From 3e51f75eea83dded0361a01993d3f6fa8306cfaa Mon Sep 17 00:00:00 2001
From: KerbezOrazgaliyeva <160107140@stu.sdu.edu.kz>
Date: Fri, 9 Nov 2018 01:08:54 +0600
Subject: [PATCH 1/8] first vertion of level1

---
 context_manager/answers/write_into_file.py    | 39 ++++++++++
 context_manager/context_manager.py            | 77 -------------------
 context_manager/first.txt                     |  1 +
 context_manager/instruction.md                | 36 +++++++++
 context_manager/second.txt                    |  1 +
 context_manager/tests/context_manager_test.py |  2 +-
 context_manager/tests/tests_for_level_one.py  | 27 +++++++
 context_manager/third.txt                     |  1 +
 context_manager/write_into_file.py            | 44 +++++++++++
 9 files changed, 150 insertions(+), 78 deletions(-)
 create mode 100644 context_manager/answers/write_into_file.py
 delete mode 100644 context_manager/context_manager.py
 create mode 100644 context_manager/instruction.md
 create mode 100644 context_manager/tests/tests_for_level_one.py
 create mode 100644 context_manager/write_into_file.py

diff --git a/context_manager/answers/write_into_file.py b/context_manager/answers/write_into_file.py
new file mode 100644
index 0000000..c1fc05a
--- /dev/null
+++ b/context_manager/answers/write_into_file.py
@@ -0,0 +1,39 @@
+from contextlib import contextmanager
+
+
+def write_without_context_manager(filename):
+    f = open(filename, 'w')
+    f.write('simple open and write done!')
+    f.close()
+    if (f.closed):
+        return True
+    return False
+
+
+def write_with_context_manager(filename):
+    with open(filename, 'w') as f:
+        f.write('write with context manager done!')
+    if (f.closed):
+        return True
+    return False
+
+
+@contextmanager
+def open_file(file, mode):
+    f = open(file, mode)
+    yield f
+    f.close()
+
+
+def check_open_file(filename):
+    with open_file(filename, 'w') as f:
+        f.write('Lorem ipsum dolor sit amet, consectetur adipiscing elit.')
+    if (f.closed):
+        return True
+    return False
+
+
+def read_file(filename):
+    with open(filename, 'r') as f:
+        for line in f:
+            return format(line)
\ No newline at end of file
diff --git a/context_manager/context_manager.py b/context_manager/context_manager.py
deleted file mode 100644
index 9756c99..0000000
--- a/context_manager/context_manager.py
+++ /dev/null
@@ -1,77 +0,0 @@
-"""
-Imports.
-"""
-
-
-def simple_open_and_write_without_context_manager(filename):
-    """
-    Writes 'simple open and write done!' into first.txt.
-    """
-    if(f.closed):
-        return True
-    return False
-
-    
-def simple_open_and_write_with_context_manager(filename):
-    """
-	  Writes 'write with context manager done!' into second.txt.
-    """
-    if(f.closed):
-        return True
-    return False
-        
-@contextmanager
-def open_file(file, mode):
-    """
-  	More complicated version of context manager.
-	  open_file() replaces open() that was used before.
-    """
-        
-def check_open_file(filename):
-    """
-    Writes 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.' into third.txt with open_file().
-    """
-    if(f.closed):
-        return True
-    return False
-        
-
-
-def change_dir_without_context_manager(filename1, filename2):
-    """
-    Gives list1 the list of files in file_one.
-    Gives list2 the list of files in file_two.
-    Uses os, getcwd, chdir
-    """
-    return list1 + list2
-
-
-        
-        
-@contextmanager
-def change_dir(filename):
-    """
-    Context manager that switches between directries with try, Finally, yield.
-    """
-
-def try_change_dir(filename):
-    """
-  	Returns list of files in filename using change_dir.
-    """
-
-def read_file(filename):
-    with open(filename, 'r') as f:
-        for line in f:
-            return format(line)
-            
-simple_open_and_write_without_context_manager('first.txt')
-simple_open_and_write_with_context_manager('second.txt')
-check_open_file('third.txt')
-print(change_dir_without_context_manager('file_one','file_two'))
-print(change_dir_without_context_manager('file_one','file_one'))
-print(change_dir_without_context_manager('file_two','file_two'))
-print(try_change_dir('file_one'))
-print(try_change_dir('file_two'))
-read_file('first.txt')
-read_file('second.txt')
-read_file('third.txt')
diff --git a/context_manager/first.txt b/context_manager/first.txt
index e69de29..92251f1 100644
--- a/context_manager/first.txt
+++ b/context_manager/first.txt
@@ -0,0 +1 @@
+simple open and write done!
\ No newline at end of file
diff --git a/context_manager/instruction.md b/context_manager/instruction.md
new file mode 100644
index 0000000..47b743e
--- /dev/null
+++ b/context_manager/instruction.md
@@ -0,0 +1,36 @@
+Context managers are a way of allocating and releasing some sort of resource exactly where you need it. The most widely used example of context managers is the 'with' statement.
+
+If you forget to close the file or let's say the database, it will later lead to big consequences. But with context manager, you don’t need to remember this, it will close everything for you.
+
+We can implement context manager as generator 
+
+```
+from contextlib import contextmanager
+@contextmanager
+```
+or as class by using magic functions
+```
+__init__
+__enter__
+__exit__
+```
+### LEVEL-1.
+
+1. Look at the file write_into_file.py
+
+2. Look at the tests in tests folter 
+
+3. Run tests with command:
+
+    ```python3 -m unittest tests/tests_for_level_one.py```
+   As you see all your tests are failed
+
+4. Now, complete the functions in write_into_file.py
+
+5. Run tests and all of them should be passed.
+
+6. Compare your answer with mine located in answers/write_into_file.py
+
+7. Congratulations, you have passed first level. Commit and push your changes. 
+
+### LEVEL-2
\ No newline at end of file
diff --git a/context_manager/second.txt b/context_manager/second.txt
index e69de29..7820744 100644
--- a/context_manager/second.txt
+++ b/context_manager/second.txt
@@ -0,0 +1 @@
+write with context manager done!
\ No newline at end of file
diff --git a/context_manager/tests/context_manager_test.py b/context_manager/tests/context_manager_test.py
index 7af9339..b9b4dce 100644
--- a/context_manager/tests/context_manager_test.py
+++ b/context_manager/tests/context_manager_test.py
@@ -1,6 +1,6 @@
 from unittest import TestCase
 import os
-import cantext_manager as f
+import context_manager as f
 
 class ContextManagerTest(TestCase):
     def test_simple_without(self):
diff --git a/context_manager/tests/tests_for_level_one.py b/context_manager/tests/tests_for_level_one.py
new file mode 100644
index 0000000..2ebfd1b
--- /dev/null
+++ b/context_manager/tests/tests_for_level_one.py
@@ -0,0 +1,27 @@
+from unittest import TestCase
+import write_into_file as f
+
+class LevelOneTest(TestCase):
+    def test_write_without(self):
+        result = f.write_without_context_manager('first.txt')
+        self.assertEqual(result, True)
+
+    def test_write_with(self):
+        result = f.write_with_context_manager('second.txt')
+        self.assertEqual(result, True)
+
+    def test_check_open_file(self):
+        result = f.check_open_file('third.txt')
+        self.assertEqual(result, True)
+
+    def test_write_without1(self):
+        result = f.read_file('first.txt')
+        self.assertEqual(result, 'simple open and write done!')
+
+    def test_write_with1(self):
+        result = f.read_file('second.txt')
+        self.assertEqual(result, 'write with context manager done!')
+
+    def test_check_open_file1(self):
+        result = f.read_file('third.txt')
+        self.assertEqual(result, 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.')
\ No newline at end of file
diff --git a/context_manager/third.txt b/context_manager/third.txt
index e69de29..d863439 100644
--- a/context_manager/third.txt
+++ b/context_manager/third.txt
@@ -0,0 +1 @@
+Lorem ipsum dolor sit amet, consectetur adipiscing elit.
\ No newline at end of file
diff --git a/context_manager/write_into_file.py b/context_manager/write_into_file.py
new file mode 100644
index 0000000..b74f912
--- /dev/null
+++ b/context_manager/write_into_file.py
@@ -0,0 +1,44 @@
+from contextlib import contextmanager
+
+
+def write_without_context_manager(filename):
+    """
+    Writes 'simple open and write done!' into filename.
+    :param filename: txt file
+    :return: boolean, true if file closed
+    """
+
+
+def write_with_context_manager(filename):
+    """
+    Writes 'write with context manager done!' into filename.
+    :param filename: txt file
+    :return: boolean, true if file closed
+    """
+
+
+"""
+GeneratorContextManager object.
+"""
+
+
+@contextmanager
+def open_file(file, mode):
+    """
+    :param file: txt file
+    :param mode: w for write
+    """
+
+
+def check_open_file(filename):
+    """
+    Writes 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.' into filename using open_file().
+    :param filename: txt file
+    :return: boolean, true is file closed
+    """
+
+
+def read_file(filename):
+    with open(filename, 'r') as f:
+        for line in f:
+            return format(line)
\ No newline at end of file

From 0b346a960b606cf8b94b8a7782e27976c2f4348c Mon Sep 17 00:00:00 2001
From: KerbezOrazgaliyeva <160107140@stu.sdu.edu.kz>
Date: Fri, 9 Nov 2018 01:13:31 +0600
Subject: [PATCH 2/8] readme.txt removed

---
 context_manager/readme.txt | 62 --------------------------------------
 1 file changed, 62 deletions(-)
 delete mode 100644 context_manager/readme.txt

diff --git a/context_manager/readme.txt b/context_manager/readme.txt
deleted file mode 100644
index 80a3193..0000000
--- a/context_manager/readme.txt
+++ /dev/null
@@ -1,62 +0,0 @@
-Context managers allow us to properly manage resources, so that we can specify exactly what we want to set up and tear down, when working with certain objects. We can understand that is the Context Manager by keyword-'with'. Context Manager great for files, but it`s useful also for so many different resources. For example, we could use this, to connect and close database. 
-
-There are 2 options to work with methods. One of this by usig a class, second one is by using function with decorater.
-1)Create Context Manager that opens the file for us.
-
-We`re opening the file using function with decorater. In our case we`re writing some text. We have to remember to close the file, after we`re done working with it.   
- 
-from contextlib import context     #We use this context manager decorator to decorate a generator function.
-
-#Code without Context Manager
-
-    f = open(filename ,'w')                       #Open the file for write
-    f.write('simple open and write done!')        #We can just work with this in any way. We write some text into the file
-    f.close()
-
-
-# Code with Context Manager
-
-    with open(filename, 'w') as f:                      #Here we are open the file and pass in the filename, f is a file object. 
-       	f.write('write with context manager done!')     #We can just work with this in any way. We decide to write some text into the file
-
-
-#2 Same example
-
-@contextmanager                #decorater
-def open_file(file, mode):
-    f = open(file, mode)
-    yield f                                               
-    f.close()
-
-def check_open_file(filename):
-    with open_file(filename, 'w') as f:      # We can refer to opened file as f due to yield f in context manager.
-        f.write('Lorem ipsum dolor sit amet, consectetur adipiscing elit.')
-    print(f.closed)
-
-
-2)So let's say that we are using Python to do some work in a lot of different directories. We're seeding into those directories doing some work and then seeding back to, where we started. For that, we initially  import os  and from contextlib import contextmanager   
-     
-cwd = os.getcwd()         #then we are setting CWD variable to our current working directory
-os.chdir(filename).       #  Now we are changing to the directory where we want to do some work 
-print(os.listdir())       #  Then we are listing out everything in that directory and just print it
-os.chdir(cwd)             # we're changing directory back to our original current working(cwd) by chdir method
- 
-We're doing this multiple times whenever we want to do this again.So, if we run the code we can see, that this works fine, it displays all files that are located in the directory. But this is a little inconvenient to save our current directory, switch directories and then switch back to the original after we're done doing what we need to do. So these are things that we don't want to have to remember to do each time. So let's create context manager with a generator function that does this. First:
- 
-@contextmanager.                  #We use the context manager decorator
-
-We are getting our current working directory, and then we want to change directory to this destination, so we create this function that takes destination as a parameter 
-
-def change_directory(destination)
-In order to catch errors we put our setup in a try and a our tear down in a finally.  
-cwd = os.getcwd().                   #With setup we will save the current directory that we are in into that CWD variable
-os.chdir(destination).               #Now we change directory to our destination
-yield                                #We are done with our setup, so now we can just yield.   
-
-In the finally block we just change directory back  to the original:
-finally:
-   os.chdir(cwd)
-)
-And now we just call function and print out. We can do it multiple times with directories that we want.
-with change_directory(filename):    
-    print(os.listdir()

From 87c7d64debcdef05d120f034e5823d69476b4a2e Mon Sep 17 00:00:00 2001
From: KerbezOrazgaliyeva <160107140@stu.sdu.edu.kz>
Date: Fri, 9 Nov 2018 01:15:59 +0600
Subject: [PATCH 3/8] to see instructions

---
 context_manager/instruction.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/context_manager/instruction.md b/context_manager/instruction.md
index 47b743e..f2a6d24 100644
--- a/context_manager/instruction.md
+++ b/context_manager/instruction.md
@@ -23,6 +23,7 @@ __exit__
 3. Run tests with command:
 
     ```python3 -m unittest tests/tests_for_level_one.py```
+    
    As you see all your tests are failed
 
 4. Now, complete the functions in write_into_file.py

From fe6d172838f150cfc29d04869b018b48d477dc04 Mon Sep 17 00:00:00 2001
From: KerbezOrazgaliyeva <160107140@stu.sdu.edu.kz>
Date: Fri, 9 Nov 2018 16:04:38 +0600
Subject: [PATCH 4/8] fix level one and first rst

---
 context_manager/first.txt                     |   1 -
 context_manager/second.txt                    |   1 -
 context_manager/tests/tests_for_level_one.py  |  19 +-
 context_manager/third.txt                     |   1 -
 docs/build/doctrees/context_manager.doctree   | Bin 0 -> 10501 bytes
 docs/build/doctrees/environment.pickle        | Bin 16916 -> 18528 bytes
 docs/build/doctrees/index.doctree             | Bin 3105 -> 3133 bytes
 .../html/_sources/context_manager.rst.txt     |  52 ++++
 docs/build/html/_sources/index.rst.txt        |   1 +
 docs/build/html/context_manager.html          | 259 ++++++++++++++++++
 docs/build/html/genindex.html                 |   1 +
 docs/build/html/index.html                    |   6 +
 docs/build/html/objects.inv                   |   4 +-
 docs/build/html/search.html                   |   1 +
 docs/build/html/searchindex.js                |   2 +-
 docs/source/context_manager.rst               |  52 ++++
 docs/source/index.rst                         |   1 +
 17 files changed, 387 insertions(+), 14 deletions(-)
 create mode 100644 docs/build/doctrees/context_manager.doctree
 create mode 100644 docs/build/html/_sources/context_manager.rst.txt
 create mode 100644 docs/build/html/context_manager.html
 create mode 100644 docs/source/context_manager.rst

diff --git a/context_manager/first.txt b/context_manager/first.txt
index 92251f1..e69de29 100644
--- a/context_manager/first.txt
+++ b/context_manager/first.txt
@@ -1 +0,0 @@
-simple open and write done!
\ No newline at end of file
diff --git a/context_manager/second.txt b/context_manager/second.txt
index 7820744..e69de29 100644
--- a/context_manager/second.txt
+++ b/context_manager/second.txt
@@ -1 +0,0 @@
-write with context manager done!
\ No newline at end of file
diff --git a/context_manager/tests/tests_for_level_one.py b/context_manager/tests/tests_for_level_one.py
index 2ebfd1b..20890e2 100644
--- a/context_manager/tests/tests_for_level_one.py
+++ b/context_manager/tests/tests_for_level_one.py
@@ -1,27 +1,32 @@
 from unittest import TestCase
-import write_into_file as f
+from write_into_file import (
+    write_without_context_manager,
+    write_with_context_manager,
+    check_open_file,
+    read_file
+)
 
 class LevelOneTest(TestCase):
     def test_write_without(self):
-        result = f.write_without_context_manager('first.txt')
+        result = write_without_context_manager('first.txt')
         self.assertEqual(result, True)
 
     def test_write_with(self):
-        result = f.write_with_context_manager('second.txt')
+        result = write_with_context_manager('second.txt')
         self.assertEqual(result, True)
 
     def test_check_open_file(self):
-        result = f.check_open_file('third.txt')
+        result = check_open_file('third.txt')
         self.assertEqual(result, True)
 
     def test_write_without1(self):
-        result = f.read_file('first.txt')
+        result = read_file('first.txt')
         self.assertEqual(result, 'simple open and write done!')
 
     def test_write_with1(self):
-        result = f.read_file('second.txt')
+        result = read_file('second.txt')
         self.assertEqual(result, 'write with context manager done!')
 
     def test_check_open_file1(self):
-        result = f.read_file('third.txt')
+        result = read_file('third.txt')
         self.assertEqual(result, 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.')
\ No newline at end of file
diff --git a/context_manager/third.txt b/context_manager/third.txt
index d863439..e69de29 100644
--- a/context_manager/third.txt
+++ b/context_manager/third.txt
@@ -1 +0,0 @@
-Lorem ipsum dolor sit amet, consectetur adipiscing elit.
\ No newline at end of file
diff --git a/docs/build/doctrees/context_manager.doctree b/docs/build/doctrees/context_manager.doctree
new file mode 100644
index 0000000000000000000000000000000000000000..305a9a53715b1d01416d4b05786748a619f0fcae
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diff --git a/docs/build/doctrees/environment.pickle b/docs/build/doctrees/environment.pickle
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diff --git a/docs/build/html/_sources/context_manager.rst.txt b/docs/build/html/_sources/context_manager.rst.txt
new file mode 100644
index 0000000..829d996
--- /dev/null
+++ b/docs/build/html/_sources/context_manager.rst.txt
@@ -0,0 +1,52 @@
+Context manager
+^^^^^^^^^^^^^^^^^
+
+**ToDo:** Read about context manager. Pass three levels for a better understanding.
+
+**Learn:** Context manager
+
+**Working directory:**  `**context_manager** <https://github.com/An4ik/Python-TDD/tree/master/context_manager>`_
+
+**Context managers** are a way of allocating and releasing some sort of resource exactly where you need it. The most widely used example of context managers is the 'with' statement.
+
+If you forget to close the file or let's say the database, it will later lead to big consequences. But with context manager, you don’t need to remember this, it will close everything for you.
+
+We can implement context manager as generator::
+
+    from contextlib import contextmanager
+    @contextmanager
+
+or as class by using magic functions::
+
+    __init__
+    __enter__
+    __exit__
+
+We want you to pass three levels for a better understanding of **context manager**
+
+
+
+LEVEL-1
+-------
+
+1. Look at the file write_into_file.py
+
+2. Look at the tests in tests folter
+
+3. Run tests with command::
+
+    python3 -m unittest tests/tests_for_level_one.py
+
+   As you see all your tests are failed
+
+4. Now, complete the functions in write_into_file.py
+
+5. Run tests and all of them should be passed.
+
+6. Compare your answer with mine located in answers/write_into_file.py
+
+7. Congratulations, you have passed first level. Commit and push your changes.
+
+LEVEL-2
+-------
+
diff --git a/docs/build/html/_sources/index.rst.txt b/docs/build/html/_sources/index.rst.txt
index 9f85396..73553d0 100644
--- a/docs/build/html/_sources/index.rst.txt
+++ b/docs/build/html/_sources/index.rst.txt
@@ -11,6 +11,7 @@ Modulus
    magic_functions
    fibonacci_numbers
    decorators
+   context_manager
 
 
 
diff --git a/docs/build/html/context_manager.html b/docs/build/html/context_manager.html
new file mode 100644
index 0000000..7228de1
--- /dev/null
+++ b/docs/build/html/context_manager.html
@@ -0,0 +1,259 @@
+
+
+<!DOCTYPE html>
+<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
+<!--[if gt IE 8]><!--> <html class="no-js" lang="en" > <!--<![endif]-->
+<head>
+  <meta charset="utf-8">
+  
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  
+  <title>Context manager &mdash; Python-TDD 0.0.1 documentation</title>
+  
+
+  
+  
+  
+  
+
+  
+
+  
+  
+    
+
+  
+
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+<li class="toctree-l1"><a class="reference internal" href="magic_functions.html">Magic functions</a></li>
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+<li class="toctree-l1"><a class="reference internal" href="decorators.html">Decorators</a></li>
+<li class="toctree-l1 current"><a class="current reference internal" href="#">Context manager</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="#level-1">LEVEL-1</a></li>
+<li class="toctree-l2"><a class="reference internal" href="#level-2">LEVEL-2</a></li>
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+</div>
+          <div role="main" class="document" itemscope="itemscope" itemtype="http://schema.org/Article">
+           <div itemprop="articleBody">
+            
+  <div class="section" id="context-manager">
+<h1>Context manager<a class="headerlink" href="#context-manager" title="Permalink to this headline">¶</a></h1>
+<p><strong>ToDo:</strong> Read about context manager. Pass three levels for a better understanding.</p>
+<p><strong>Learn:</strong> Context manager</p>
+<p><strong>Working directory:</strong>  <a class="reference external" href="https://github.com/An4ik/Python-TDD/tree/master/context_manager">**context_manager**</a></p>
+<p><strong>Context managers</strong> are a way of allocating and releasing some sort of resource exactly where you need it. The most widely used example of context managers is the ‘with’ statement.</p>
+<p>If you forget to close the file or let’s say the database, it will later lead to big consequences. But with context manager, you don’t need to remember this, it will close everything for you.</p>
+<p>We can implement context manager as generator:</p>
+<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">contextlib</span> <span class="k">import</span> <span class="n">contextmanager</span>
+<span class="nd">@contextmanager</span>
+</pre></div>
+</div>
+<p>or as class by using magic functions:</p>
+<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="fm">__init__</span>
+<span class="fm">__enter__</span>
+<span class="fm">__exit__</span>
+</pre></div>
+</div>
+<p>We want you to pass three levels for a better understanding of <strong>context manager</strong></p>
+<div class="section" id="level-1">
+<h2>LEVEL-1<a class="headerlink" href="#level-1" title="Permalink to this headline">¶</a></h2>
+<ol class="arabic">
+<li><p class="first">Look at the file write_into_file.py</p>
+</li>
+<li><p class="first">Look at the tests in tests folter</p>
+</li>
+<li><p class="first">Run tests with command:</p>
+<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python3</span> <span class="o">-</span><span class="n">m</span> <span class="n">unittest</span> <span class="n">tests</span><span class="o">/</span><span class="n">tests_for_level_one</span><span class="o">.</span><span class="n">py</span>
+</pre></div>
+</div>
+<p>As you see all your tests are failed</p>
+</li>
+<li><p class="first">Now, complete the functions in write_into_file.py</p>
+</li>
+<li><p class="first">Run tests and all of them should be passed.</p>
+</li>
+<li><p class="first">Compare your answer with mine located in answers/write_into_file.py</p>
+</li>
+<li><p class="first">Congratulations, you have passed first level. Commit and push your changes.</p>
+</li>
+</ol>
+</div>
+<div class="section" id="level-2">
+<h2>LEVEL-2<a class="headerlink" href="#level-2" title="Permalink to this headline">¶</a></h2>
+</div>
+</div>
+
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+
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\ No newline at end of file
diff --git a/docs/build/html/genindex.html b/docs/build/html/genindex.html
index 5f27bea..d220fbe 100644
--- a/docs/build/html/genindex.html
+++ b/docs/build/html/genindex.html
@@ -83,6 +83,7 @@
 <li class="toctree-l1"><a class="reference internal" href="magic_functions.html">Magic functions</a></li>
 <li class="toctree-l1"><a class="reference internal" href="fibonacci_numbers.html">Fibonacci numbers</a></li>
 <li class="toctree-l1"><a class="reference internal" href="decorators.html">Decorators</a></li>
+<li class="toctree-l1"><a class="reference internal" href="context_manager.html">Context manager</a></li>
 </ul>
 
             
diff --git a/docs/build/html/index.html b/docs/build/html/index.html
index 2c16b3a..779126e 100644
--- a/docs/build/html/index.html
+++ b/docs/build/html/index.html
@@ -83,6 +83,7 @@
 <li class="toctree-l1"><a class="reference internal" href="magic_functions.html">Magic functions</a></li>
 <li class="toctree-l1"><a class="reference internal" href="fibonacci_numbers.html">Fibonacci numbers</a></li>
 <li class="toctree-l1"><a class="reference internal" href="decorators.html">Decorators</a></li>
+<li class="toctree-l1"><a class="reference internal" href="context_manager.html">Context manager</a></li>
 </ul>
 
             
@@ -168,6 +169,11 @@ <h1>Modulus<a class="headerlink" href="#modulus" title="Permalink to this headli
 </li>
 <li class="toctree-l1"><a class="reference internal" href="fibonacci_numbers.html">Fibonacci numbers</a></li>
 <li class="toctree-l1"><a class="reference internal" href="decorators.html">Decorators</a></li>
+<li class="toctree-l1"><a class="reference internal" href="context_manager.html">Context manager</a><ul>
+<li class="toctree-l2"><a class="reference internal" href="context_manager.html#level-1">LEVEL-1</a></li>
+<li class="toctree-l2"><a class="reference internal" href="context_manager.html#level-2">LEVEL-2</a></li>
+</ul>
+</li>
 </ul>
 </div>
 </div>
diff --git a/docs/build/html/objects.inv b/docs/build/html/objects.inv
index 8e01cf9..e243fa4 100644
--- a/docs/build/html/objects.inv
+++ b/docs/build/html/objects.inv
@@ -2,6 +2,4 @@
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hF}��:�O���M�B�3]:�O5����d���k[r;8i�W���Ѳ~tnj�Ey�a�̒��g�����b�+ ��-��R������/��D
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diff --git a/docs/build/html/search.html b/docs/build/html/search.html
index 7fee20d..d0f26c1 100644
--- a/docs/build/html/search.html
+++ b/docs/build/html/search.html
@@ -82,6 +82,7 @@
 <li class="toctree-l1"><a class="reference internal" href="magic_functions.html">Magic functions</a></li>
 <li class="toctree-l1"><a class="reference internal" href="fibonacci_numbers.html">Fibonacci numbers</a></li>
 <li class="toctree-l1"><a class="reference internal" href="decorators.html">Decorators</a></li>
+<li class="toctree-l1"><a class="reference internal" href="context_manager.html">Context manager</a></li>
 </ul>
 
             
diff --git a/docs/build/html/searchindex.js b/docs/build/html/searchindex.js
index 3959845..8c0219d 100644
--- a/docs/build/html/searchindex.js
+++ b/docs/build/html/searchindex.js
@@ -1 +1 @@
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\ No newline at end of file
diff --git a/docs/source/context_manager.rst b/docs/source/context_manager.rst
new file mode 100644
index 0000000..829d996
--- /dev/null
+++ b/docs/source/context_manager.rst
@@ -0,0 +1,52 @@
+Context manager
+^^^^^^^^^^^^^^^^^
+
+**ToDo:** Read about context manager. Pass three levels for a better understanding.
+
+**Learn:** Context manager
+
+**Working directory:**  `**context_manager** <https://github.com/An4ik/Python-TDD/tree/master/context_manager>`_
+
+**Context managers** are a way of allocating and releasing some sort of resource exactly where you need it. The most widely used example of context managers is the 'with' statement.
+
+If you forget to close the file or let's say the database, it will later lead to big consequences. But with context manager, you don’t need to remember this, it will close everything for you.
+
+We can implement context manager as generator::
+
+    from contextlib import contextmanager
+    @contextmanager
+
+or as class by using magic functions::
+
+    __init__
+    __enter__
+    __exit__
+
+We want you to pass three levels for a better understanding of **context manager**
+
+
+
+LEVEL-1
+-------
+
+1. Look at the file write_into_file.py
+
+2. Look at the tests in tests folter
+
+3. Run tests with command::
+
+    python3 -m unittest tests/tests_for_level_one.py
+
+   As you see all your tests are failed
+
+4. Now, complete the functions in write_into_file.py
+
+5. Run tests and all of them should be passed.
+
+6. Compare your answer with mine located in answers/write_into_file.py
+
+7. Congratulations, you have passed first level. Commit and push your changes.
+
+LEVEL-2
+-------
+
diff --git a/docs/source/index.rst b/docs/source/index.rst
index 9f85396..73553d0 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -11,6 +11,7 @@ Modulus
    magic_functions
    fibonacci_numbers
    decorators
+   context_manager
 
 
 

From abdd77b7a76e4034b6f65b4b1d07ba425e42af1d Mon Sep 17 00:00:00 2001
From: KerbezOrazgaliyeva <160107140@stu.sdu.edu.kz>
Date: Fri, 9 Nov 2018 16:07:37 +0600
Subject: [PATCH 5/8] instructions fix

---
 context_manager/instruction.md | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/context_manager/instruction.md b/context_manager/instruction.md
index f2a6d24..f4a9111 100644
--- a/context_manager/instruction.md
+++ b/context_manager/instruction.md
@@ -1,19 +1,3 @@
-Context managers are a way of allocating and releasing some sort of resource exactly where you need it. The most widely used example of context managers is the 'with' statement.
-
-If you forget to close the file or let's say the database, it will later lead to big consequences. But with context manager, you don’t need to remember this, it will close everything for you.
-
-We can implement context manager as generator 
-
-```
-from contextlib import contextmanager
-@contextmanager
-```
-or as class by using magic functions
-```
-__init__
-__enter__
-__exit__
-```
 ### LEVEL-1.
 
 1. Look at the file write_into_file.py

From 8f6e7f0f3718a9ba251ceeba8068e0864661ebb9 Mon Sep 17 00:00:00 2001
From: KerbezOrazgaliyeva <160107140@stu.sdu.edu.kz>
Date: Fri, 9 Nov 2018 17:47:24 +0600
Subject: [PATCH 6/8] test name change

---
 context_manager/instruction.md                                  | 2 +-
 .../tests/{tests_for_level_one.py => test_write_into_file.py}   | 0
 2 files changed, 1 insertion(+), 1 deletion(-)
 rename context_manager/tests/{tests_for_level_one.py => test_write_into_file.py} (100%)

diff --git a/context_manager/instruction.md b/context_manager/instruction.md
index f4a9111..234b424 100644
--- a/context_manager/instruction.md
+++ b/context_manager/instruction.md
@@ -6,7 +6,7 @@
 
 3. Run tests with command:
 
-    ```python3 -m unittest tests/tests_for_level_one.py```
+    ```python3 -m unittest tests/test_write_into_file.py```
     
    As you see all your tests are failed
 
diff --git a/context_manager/tests/tests_for_level_one.py b/context_manager/tests/test_write_into_file.py
similarity index 100%
rename from context_manager/tests/tests_for_level_one.py
rename to context_manager/tests/test_write_into_file.py

From 891a6239f0ad9d443d190db66910b142cd7ee714 Mon Sep 17 00:00:00 2001
From: KerbezOrazgaliyeva <160107140@stu.sdu.edu.kz>
Date: Sat, 10 Nov 2018 21:40:17 +0600
Subject: [PATCH 7/8] level2

---
 context_manager/answers/change_directory.py   | 30 +++++++++++++
 context_manager/change_directory.py           | 33 ++++++++++++++
 context_manager/instruction.md                | 44 ++++++++++++++++++-
 .../tests/test_change_directory.py            | 27 ++++++++++++
 4 files changed, 132 insertions(+), 2 deletions(-)
 create mode 100644 context_manager/answers/change_directory.py
 create mode 100644 context_manager/change_directory.py
 create mode 100644 context_manager/tests/test_change_directory.py

diff --git a/context_manager/answers/change_directory.py b/context_manager/answers/change_directory.py
new file mode 100644
index 0000000..8c8ac62
--- /dev/null
+++ b/context_manager/answers/change_directory.py
@@ -0,0 +1,30 @@
+import os
+from contextlib import contextmanager
+
+
+def change_dir_without_context_manager(filename1, filename2):
+    cwd = os.getcwd()
+    os.chdir(filename1)
+    a = os.listdir()
+    os.chdir(cwd)
+
+    cwd = os.getcwd()
+    os.chdir(filename2)
+    b = os.listdir()
+    os.chdir(cwd)
+    return a + b
+
+
+@contextmanager
+def change_dir(filename):
+    try:
+        cwd = os.getcwd()
+        os.chdir(filename)
+        yield
+    finally:
+        os.chdir(cwd)
+
+
+def try_change_dir(filename):
+    with change_dir(filename):
+        return os.listdir()
diff --git a/context_manager/change_directory.py b/context_manager/change_directory.py
new file mode 100644
index 0000000..293fd34
--- /dev/null
+++ b/context_manager/change_directory.py
@@ -0,0 +1,33 @@
+import os
+from contextlib import contextmanager
+
+
+def change_dir_without_context_manager(filename1, filename2):
+   """
+   Changes directory from pwd to pwd/filename.
+   :param filename1: name of first folder
+   :param filename2: name of second folder
+   :return: list if files in filename1 and filename2
+   """
+
+
+"""
+With context manager.
+"""
+
+
+@contextmanager
+def change_dir(filename):
+   """
+   Changes directory from pwd to pwd/filename.
+   :param filename: name of folder
+   """
+
+
+def try_change_dir(filename):
+    """
+    Uses change_dir().
+    :param filename: name of folder
+    :return: list of files in folder
+    """
+
diff --git a/context_manager/instruction.md b/context_manager/instruction.md
index 234b424..c8be33f 100644
--- a/context_manager/instruction.md
+++ b/context_manager/instruction.md
@@ -2,7 +2,7 @@
 
 1. Look at the file write_into_file.py
 
-2. Look at the tests in tests folter 
+2. Look at the tests in tests folder 
 
 3. Run tests with command:
 
@@ -18,4 +18,44 @@
 
 7. Congratulations, you have passed first level. Commit and push your changes. 
 
-### LEVEL-2
\ No newline at end of file
+### LEVEL-2
+
+1. Look at the file change_directory.py
+
+2. Look at the test_change_directory.py in tests folder 
+
+3. Run tests with command:
+
+    ```python3 -m unittest tests/test_change_directory.py```
+    
+   As you see all your tests are failed
+
+4. Now, complete the functions in change_directory.py
+
+5. Run tests and all of them should be passed.
+
+6. Compare your answer with mine located in answers/change_directory.py
+
+7. Congratulations, you have passed second level. Commit and push your changes. 
+
+### LEVEL-3
+
+1. Look at the file change_directory.py
+
+2. Look at the test_change_directory.py in tests folder 
+
+3. Run tests with command:
+
+    ```python3 -m unittest tests/test_change_directory.py```
+    
+   As you see all your tests are failed
+
+4. Now, complete the functions in change_directory.py
+
+5. Run tests and all of them should be passed.
+
+6. Compare your answer with mine located in answers/change_directory.py
+
+7. Congratulations, you have passed second level. Commit and push your changes. 
+
+
diff --git a/context_manager/tests/test_change_directory.py b/context_manager/tests/test_change_directory.py
new file mode 100644
index 0000000..10f96d2
--- /dev/null
+++ b/context_manager/tests/test_change_directory.py
@@ -0,0 +1,27 @@
+from unittest import TestCase
+from change_directory import (
+    change_dir_without_context_manager,
+    try_change_dir
+)
+
+class ContextManagerTest(TestCase):
+    def test_change_dir_without(self):
+        result = change_dir_without_context_manager('file_one','file_two')
+        self.assertEqual(result, ['love.txt', 'context.txt', 'I.txt', 'manager.txt', 'love.txt', 'and.txt', 'I.txt', 'beshbarmak.txt'])
+
+    def test_change_dir_without1(self):
+        result = change_dir_without_context_manager('file_one', 'file_one')
+        self.assertEqual(result, ['love.txt', 'context.txt', 'I.txt', 'manager.txt', 'love.txt', 'context.txt', 'I.txt', 'manager.txt'])
+
+    def test_change_dir_without2(self):
+        result = change_dir_without_context_manager('file_two', 'file_two')
+        self.assertEqual(result, ['love.txt', 'and.txt', 'I.txt', 'beshbarmak.txt', 'love.txt', 'and.txt', 'I.txt', 'beshbarmak.txt'])
+
+
+    def test_change_dir_with(self):
+        result = try_change_dir('file_one')
+        self.assertEqual(result, ['love.txt', 'context.txt', 'I.txt', 'manager.txt'])
+
+    def test_change_dir_with1(self):
+        result = try_change_dir('file_two')
+        self.assertEqual(result,['love.txt', 'and.txt', 'I.txt', 'beshbarmak.txt'])
\ No newline at end of file

From cdb42cc1efb71900fdcfa9b0e9831c25313b30ee Mon Sep 17 00:00:00 2001
From: KerbezOrazgaliyeva <160107140@stu.sdu.edu.kz>
Date: Mon, 10 Dec 2018 05:06:41 +0600
Subject: [PATCH 8/8] added test 1, changed test2=test1 test3=test2 test1=new
 test

---
 context_manager/answers/context_manager.py    |  77 ------------------
 .../answers/context_manager_as_class.py       |  17 ++++
 context_manager/context_manager_as_class.py   |  16 ++++
 context_manager/first.txt                     |   0
 context_manager/instruction.md                |  23 +++---
 context_manager/second.txt                    |   0
 context_manager/tests/context_manager_test.py |  49 -----------
 .../tests/test_context_manager_as_class.py    |  11 +++
 context_manager/tests/test_write_into_file.py |   2 +-
 context_manager/third.txt                     |   0
 docs/build/doctrees/context_manager.doctree   | Bin 10501 -> 17179 bytes
 docs/build/doctrees/environment.pickle        | Bin 18528 -> 18963 bytes
 docs/build/doctrees/index.doctree             | Bin 3133 -> 3135 bytes
 .../html/_sources/context_manager.rst.txt     |  45 ++++++++--
 docs/build/html/context_manager.html          |  58 +++++++++++--
 docs/build/html/index.html                    |   5 +-
 docs/build/html/searchindex.js                |   2 +-
 docs/source/context_manager.rst               |  45 ++++++++--
 18 files changed, 191 insertions(+), 159 deletions(-)
 delete mode 100644 context_manager/answers/context_manager.py
 create mode 100644 context_manager/answers/context_manager_as_class.py
 create mode 100644 context_manager/context_manager_as_class.py
 delete mode 100644 context_manager/first.txt
 delete mode 100644 context_manager/second.txt
 delete mode 100644 context_manager/tests/context_manager_test.py
 create mode 100644 context_manager/tests/test_context_manager_as_class.py
 delete mode 100644 context_manager/third.txt

diff --git a/context_manager/answers/context_manager.py b/context_manager/answers/context_manager.py
deleted file mode 100644
index 45115fd..0000000
--- a/context_manager/answers/context_manager.py
+++ /dev/null
@@ -1,77 +0,0 @@
-import os
-from contextlib import contextmanager
-
-def simple_open_and_write_without_context_manager(filename):
-    f = open(filename ,'w')
-    f.write('simple open and write done!')
-    f.close()
-    if(f.closed):
-        return True
-    else:
-        return False
-
-def simple_open_and_write_with_context_manager(filename):
-    with open(filename, 'w') as f:
-        f.write('write with context manager done!')
-    if(f.closed):
-        return True
-    else:
-        return False
-        
-
-@contextmanager
-def open_file(file, mode):
-    f = open(file, mode)
-    yield f
-    f.close()
-        
-def check_open_file(filename):
-    with open_file(filename, 'w') as f:
-        f.write('Lorem ipsum dolor sit amet, consectetur adipiscing elit.')
-    if(f.closed):
-        return True
-    else:
-        return False
-        
-
-def change_dir_without_context_manager(filename1, filename2):
-    cwd = os.getcwd()
-    os.chdir(filename1)
-    a = os.listdir()
-    os.chdir(cwd)
-    
-    cwd = os.getcwd()
-    os.chdir(filename2)
-    b = os.listdir()
-    os.chdir(cwd)
-    return a + b
-
-@contextmanager
-def change_dir(filename):
-    try:
-        cwd = os.getcwd()
-        os.chdir(filename)
-        yield
-    finally:
-        os.chdir(cwd)
-
-def try_change_dir(filename):
-    with change_dir(filename):
-        return os.listdir()
-
-def read_file(filename):
-    with open(filename, 'r') as f:
-        for line in f:
-            return format(line)
-            
-simple_open_and_write_without_context_manager('first.txt')
-simple_open_and_write_with_context_manager('second.txt')
-check_open_file('third.txt')
-print(change_dir_without_context_manager('file_one','file_two'))
-print(change_dir_without_context_manager('file_one','file_one'))
-print(change_dir_without_context_manager('file_two','file_two'))
-print(try_change_dir('file_one'))
-print(try_change_dir('file_two'))
-read_file('first.txt')
-read_file('second.txt')
-read_file('third.txt')
diff --git a/context_manager/answers/context_manager_as_class.py b/context_manager/answers/context_manager_as_class.py
new file mode 100644
index 0000000..9058cc9
--- /dev/null
+++ b/context_manager/answers/context_manager_as_class.py
@@ -0,0 +1,17 @@
+class File(object):
+    def __init__(self, file_name, method):
+        self.file_obj = open(file_name, method)
+    def __enter__(self):
+        return self.file_obj
+    def __exit__(self, type, value, traceback):
+        self.file_obj.close()
+
+def check(filename):
+    with File(filename, 'w') as opened_file:
+        opened_file.write('Yeah! You can write context manager as class)')
+
+
+def read_file(filename):
+    with open(filename, 'r') as f:
+        for line in f:
+            return format(line)
\ No newline at end of file
diff --git a/context_manager/context_manager_as_class.py b/context_manager/context_manager_as_class.py
new file mode 100644
index 0000000..8759b18
--- /dev/null
+++ b/context_manager/context_manager_as_class.py
@@ -0,0 +1,16 @@
+class File(object):
+    """
+    Context manager class with '__init__', '__enter__', '__exit__' methods that opens and closes file.
+    """
+
+def check(filename):
+    """
+    Writes 'Yeah! You can write context manager as class)') into filename with File class.
+    :param filename: txt file
+    """
+
+
+def read_file(filename):
+    with open(filename, 'r') as f:
+        for line in f:
+            return format(line)
\ No newline at end of file
diff --git a/context_manager/first.txt b/context_manager/first.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/context_manager/instruction.md b/context_manager/instruction.md
index c8be33f..4e4811a 100644
--- a/context_manager/instruction.md
+++ b/context_manager/instruction.md
@@ -1,42 +1,42 @@
 ### LEVEL-1.
 
-1. Look at the file write_into_file.py
+1. Look at the file context_manager_as_class.py
 
-2. Look at the tests in tests folder 
+2. Look at the test_context_manager_as_class.py in tests folder 
 
 3. Run tests with command:
 
-    ```python3 -m unittest tests/test_write_into_file.py```
+    ```python3 -m unittest tests/test_context_manager_as_class.py```
     
    As you see all your tests are failed
 
-4. Now, complete the functions in write_into_file.py
+4. Now, complete the functions in context_manager_as_class.py
 
 5. Run tests and all of them should be passed.
 
-6. Compare your answer with mine located in answers/write_into_file.py
+6. Compare your answer with mine located in answers/change_directory.py
 
 7. Congratulations, you have passed first level. Commit and push your changes. 
 
 ### LEVEL-2
 
-1. Look at the file change_directory.py
+1. Look at the file write_into_file.py
 
-2. Look at the test_change_directory.py in tests folder 
+2. Look at the tests in tests folder 
 
 3. Run tests with command:
 
-    ```python3 -m unittest tests/test_change_directory.py```
+    ```python3 -m unittest tests/test_write_into_file.py```
     
    As you see all your tests are failed
 
-4. Now, complete the functions in change_directory.py
+4. Now, complete the functions in write_into_file.py
 
 5. Run tests and all of them should be passed.
 
-6. Compare your answer with mine located in answers/change_directory.py
+6. Compare your answer with mine located in answers/write_into_file.py
 
-7. Congratulations, you have passed second level. Commit and push your changes. 
+7. Congratulations, you have passed first level. Commit and push your changes. 
 
 ### LEVEL-3
 
@@ -58,4 +58,3 @@
 
 7. Congratulations, you have passed second level. Commit and push your changes. 
 
-
diff --git a/context_manager/second.txt b/context_manager/second.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/context_manager/tests/context_manager_test.py b/context_manager/tests/context_manager_test.py
deleted file mode 100644
index b9b4dce..0000000
--- a/context_manager/tests/context_manager_test.py
+++ /dev/null
@@ -1,49 +0,0 @@
-from unittest import TestCase
-import os
-import context_manager as f
-
-class ContextManagerTest(TestCase):
-    def test_simple_without(self):
-        result = f.simple_open_and_write_without_context_manager('first.txt')
-        self.assertEqual(result, True)
-
-    def test_simple_with(self):
-        result = f.simple_open_and_write_with_context_manager('second.txt')
-        self.assertEqual(result, True)
-
-    def test_check_open_file(self):
-        result = f.check_open_file('third.txt')
-        self.assertEqual(result, True)
-
-    def test_simple_without1(self):
-        result = f.read_file('first.txt')
-        self.assertEqual(result, 'simple open and write done!')
-
-    def test_simple_with1(self):
-        result = f.read_file('second.txt')
-        self.assertEqual(result, 'write with context manager done!')
-
-    def test_check_open_file1(self):
-        result = f.read_file('third.txt')
-        self.assertEqual(result, 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.')
-
-    def test_change_dir_without(self):
-        result = f.change_dir_without_context_manager('file_one','file_two')
-        self.assertEqual(result, ['love.txt', 'context.txt', 'I.txt', 'manager.txt', 'love.txt', 'and.txt', 'I.txt', 'beshbarmak.txt'])
-
-    def test_change_dir_without1(self):
-        result = f.change_dir_without_context_manager('file_one', 'file_one')
-        self.assertEqual(result, ['love.txt', 'context.txt', 'I.txt', 'manager.txt', 'love.txt', 'context.txt', 'I.txt', 'manager.txt'])
-
-    def test_change_dir_without2(self):
-        result = f.change_dir_without_context_manager('file_two', 'file_two')
-        self.assertEqual(result, ['love.txt', 'and.txt', 'I.txt', 'beshbarmak.txt', 'love.txt', 'and.txt', 'I.txt', 'beshbarmak.txt'])
-
-
-    def test_change_dir_with(self):
-        result = f.try_change_dir('file_one')
-        self.assertEqual(result, ['love.txt', 'context.txt', 'I.txt', 'manager.txt'])
-
-    def test_change_dir_with1(self):
-        result = f.try_change_dir('file_two')
-        self.assertEqual(result,['love.txt', 'and.txt', 'I.txt', 'beshbarmak.txt'])
diff --git a/context_manager/tests/test_context_manager_as_class.py b/context_manager/tests/test_context_manager_as_class.py
new file mode 100644
index 0000000..9ee9031
--- /dev/null
+++ b/context_manager/tests/test_context_manager_as_class.py
@@ -0,0 +1,11 @@
+from unittest import TestCase
+from context_manager_as_class import (
+    check,
+    read_file
+)
+
+class LevelOneTest(TestCase):
+    def test_write_with1(self):
+        check('first.txt')
+        result = read_file('first.txt')
+        self.assertEqual(result, 'Yeah! You can write context manager as class)')
\ No newline at end of file
diff --git a/context_manager/tests/test_write_into_file.py b/context_manager/tests/test_write_into_file.py
index 20890e2..96e3f55 100644
--- a/context_manager/tests/test_write_into_file.py
+++ b/context_manager/tests/test_write_into_file.py
@@ -6,7 +6,7 @@
     read_file
 )
 
-class LevelOneTest(TestCase):
+class LevelTwoTest(TestCase):
     def test_write_without(self):
         result = write_without_context_manager('first.txt')
         self.assertEqual(result, True)
diff --git a/context_manager/third.txt b/context_manager/third.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/docs/build/doctrees/context_manager.doctree b/docs/build/doctrees/context_manager.doctree
index 305a9a53715b1d01416d4b05786748a619f0fcae..0d95fae07afda2b5888b0e4c6bda53f36d3ef5b0 100644
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diff --git a/docs/build/doctrees/environment.pickle b/docs/build/doctrees/environment.pickle
index c4df5667f7aa15dc301c71ab80687944be19346e..55e42bb3257dad52ab7f11d07ddd2e467a95e74e 100644
GIT binary patch
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diff --git a/docs/build/doctrees/index.doctree b/docs/build/doctrees/index.doctree
index 284c6852f5e26ee6a96ba66b82ab24c3c98dab63..31a49b2ee313da3029228c09facc2795b9fec08c 100644
GIT binary patch
delta 129
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delta 104
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diff --git a/docs/build/html/_sources/context_manager.rst.txt b/docs/build/html/_sources/context_manager.rst.txt
index 829d996..3a63868 100644
--- a/docs/build/html/_sources/context_manager.rst.txt
+++ b/docs/build/html/_sources/context_manager.rst.txt
@@ -24,10 +24,29 @@ or as class by using magic functions::
 
 We want you to pass three levels for a better understanding of **context manager**
 
+Context manager as class
+------------------------
 
+1. Look at the file context_manager_as_class.py
 
-LEVEL-1
--------
+2. Look at the test_context_manager_as_class.py in tests folder
+
+3. Run tests with command::
+
+    python3 -m unittest tests/test_context_manager_as_class.py
+
+   As you see all your tests are failed
+
+4. Now, complete the functions in context_manager_as_class.py
+
+5. Run tests and all of them should be passed.
+
+6. Compare your answer with mine located in answers/change_directory.py
+
+7. Congratulations, you have passed first level. Commit and push your changes.
+
+Write into file
+---------------
 
 1. Look at the file write_into_file.py
 
@@ -35,7 +54,7 @@ LEVEL-1
 
 3. Run tests with command::
 
-    python3 -m unittest tests/tests_for_level_one.py
+    python3 -m unittest tests/tests_write_into_file.py
 
    As you see all your tests are failed
 
@@ -47,6 +66,22 @@ LEVEL-1
 
 7. Congratulations, you have passed first level. Commit and push your changes.
 
-LEVEL-2
--------
+Change directory
+----------------
+1. Look at the file change_directory.py
+
+2. Look at the test_change_directory.py in tests folder
+
+3. Run tests with command::
+
+    python3 -m unittest tests/test_change_directory.py
+
+   As you see all your tests are failed
+
+4. Now, complete the functions in change_directory.py
+
+5. Run tests and all of them should be passed.
+
+6. Compare your answer with mine located in answers/change_directory.py
 
+7. Congratulations, you have passed second level. Commit and push your changes.
diff --git a/docs/build/html/context_manager.html b/docs/build/html/context_manager.html
index 7228de1..ef0bf60 100644
--- a/docs/build/html/context_manager.html
+++ b/docs/build/html/context_manager.html
@@ -84,8 +84,9 @@
 <li class="toctree-l1"><a class="reference internal" href="fibonacci_numbers.html">Fibonacci numbers</a></li>
 <li class="toctree-l1"><a class="reference internal" href="decorators.html">Decorators</a></li>
 <li class="toctree-l1 current"><a class="current reference internal" href="#">Context manager</a><ul>
-<li class="toctree-l2"><a class="reference internal" href="#level-1">LEVEL-1</a></li>
-<li class="toctree-l2"><a class="reference internal" href="#level-2">LEVEL-2</a></li>
+<li class="toctree-l2"><a class="reference internal" href="#context-manager-as-class">Context manager as class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="#write-into-file">Write into file</a></li>
+<li class="toctree-l2"><a class="reference internal" href="#change-directory">Change directory</a></li>
 </ul>
 </li>
 </ul>
@@ -171,15 +172,38 @@ <h1>Context manager<a class="headerlink" href="#context-manager" title="Permalin
 </pre></div>
 </div>
 <p>We want you to pass three levels for a better understanding of <strong>context manager</strong></p>
-<div class="section" id="level-1">
-<h2>LEVEL-1<a class="headerlink" href="#level-1" title="Permalink to this headline">¶</a></h2>
+<div class="section" id="context-manager-as-class">
+<h2>Context manager as class<a class="headerlink" href="#context-manager-as-class" title="Permalink to this headline">¶</a></h2>
+<ol class="arabic">
+<li><p class="first">Look at the file context_manager_as_class.py</p>
+</li>
+<li><p class="first">Look at the test_context_manager_as_class.py in tests folder</p>
+</li>
+<li><p class="first">Run tests with command:</p>
+<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python3</span> <span class="o">-</span><span class="n">m</span> <span class="n">unittest</span> <span class="n">tests</span><span class="o">/</span><span class="n">test_context_manager_as_class</span><span class="o">.</span><span class="n">py</span>
+</pre></div>
+</div>
+<p>As you see all your tests are failed</p>
+</li>
+<li><p class="first">Now, complete the functions in context_manager_as_class.py</p>
+</li>
+<li><p class="first">Run tests and all of them should be passed.</p>
+</li>
+<li><p class="first">Compare your answer with mine located in answers/change_directory.py</p>
+</li>
+<li><p class="first">Congratulations, you have passed first level. Commit and push your changes.</p>
+</li>
+</ol>
+</div>
+<div class="section" id="write-into-file">
+<h2>Write into file<a class="headerlink" href="#write-into-file" title="Permalink to this headline">¶</a></h2>
 <ol class="arabic">
 <li><p class="first">Look at the file write_into_file.py</p>
 </li>
 <li><p class="first">Look at the tests in tests folter</p>
 </li>
 <li><p class="first">Run tests with command:</p>
-<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python3</span> <span class="o">-</span><span class="n">m</span> <span class="n">unittest</span> <span class="n">tests</span><span class="o">/</span><span class="n">tests_for_level_one</span><span class="o">.</span><span class="n">py</span>
+<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python3</span> <span class="o">-</span><span class="n">m</span> <span class="n">unittest</span> <span class="n">tests</span><span class="o">/</span><span class="n">tests_write_into_file</span><span class="o">.</span><span class="n">py</span>
 </pre></div>
 </div>
 <p>As you see all your tests are failed</p>
@@ -194,8 +218,28 @@ <h2>LEVEL-1<a class="headerlink" href="#level-1" title="Permalink to this headli
 </li>
 </ol>
 </div>
-<div class="section" id="level-2">
-<h2>LEVEL-2<a class="headerlink" href="#level-2" title="Permalink to this headline">¶</a></h2>
+<div class="section" id="change-directory">
+<h2>Change directory<a class="headerlink" href="#change-directory" title="Permalink to this headline">¶</a></h2>
+<ol class="arabic">
+<li><p class="first">Look at the file change_directory.py</p>
+</li>
+<li><p class="first">Look at the test_change_directory.py in tests folder</p>
+</li>
+<li><p class="first">Run tests with command:</p>
+<div class="highlight-default notranslate"><div class="highlight"><pre><span></span><span class="n">python3</span> <span class="o">-</span><span class="n">m</span> <span class="n">unittest</span> <span class="n">tests</span><span class="o">/</span><span class="n">test_change_directory</span><span class="o">.</span><span class="n">py</span>
+</pre></div>
+</div>
+<p>As you see all your tests are failed</p>
+</li>
+<li><p class="first">Now, complete the functions in change_directory.py</p>
+</li>
+<li><p class="first">Run tests and all of them should be passed.</p>
+</li>
+<li><p class="first">Compare your answer with mine located in answers/change_directory.py</p>
+</li>
+<li><p class="first">Congratulations, you have passed second level. Commit and push your changes.</p>
+</li>
+</ol>
 </div>
 </div>
 
diff --git a/docs/build/html/index.html b/docs/build/html/index.html
index 779126e..c77ddc9 100644
--- a/docs/build/html/index.html
+++ b/docs/build/html/index.html
@@ -170,8 +170,9 @@ <h1>Modulus<a class="headerlink" href="#modulus" title="Permalink to this headli
 <li class="toctree-l1"><a class="reference internal" href="fibonacci_numbers.html">Fibonacci numbers</a></li>
 <li class="toctree-l1"><a class="reference internal" href="decorators.html">Decorators</a></li>
 <li class="toctree-l1"><a class="reference internal" href="context_manager.html">Context manager</a><ul>
-<li class="toctree-l2"><a class="reference internal" href="context_manager.html#level-1">LEVEL-1</a></li>
-<li class="toctree-l2"><a class="reference internal" href="context_manager.html#level-2">LEVEL-2</a></li>
+<li class="toctree-l2"><a class="reference internal" href="context_manager.html#context-manager-as-class">Context manager as class</a></li>
+<li class="toctree-l2"><a class="reference internal" href="context_manager.html#write-into-file">Write into file</a></li>
+<li class="toctree-l2"><a class="reference internal" href="context_manager.html#change-directory">Change directory</a></li>
 </ul>
 </li>
 </ul>
diff --git a/docs/build/html/searchindex.js b/docs/build/html/searchindex.js
index 8c0219d..a72738a 100644
--- a/docs/build/html/searchindex.js
+++ b/docs/build/html/searchindex.js
@@ -1 +1 @@
-Search.setIndex({docnames:["baby_steps","context_manager","decorators","fibonacci_numbers","index","introduction","magic_functions"],envversion:{"sphinx.domains.c":1,"sphinx.domains.changeset":1,"sphinx.domains.cpp":1,"sphinx.domains.javascript":1,"sphinx.domains.math":1,"sphinx.domains.python":1,"sphinx.domains.rst":1,"sphinx.domains.std":1,sphinx:54},filenames:["baby_steps.rst","context_manager.rst","decorators.rst","fibonacci_numbers.rst","index.rst","introduction.rst","magic_functions.rst"],objects:{},objnames:{},objtypes:{},terms:{"case":5,"class":[0,1,3],"function":[0,1,4],"goto":5,"import":1,"new":5,"short":5,But:1,For:3,The:[1,3],__enter__:1,__exit__:1,__init__:1,about:1,advanc:5,after:3,all:[0,1,3,5,6],alloc:1,alreadi:0,answer:[0,1,3,5,6],approach:0,babi:4,baby_step:0,basic:5,befor:5,better:1,big:1,bla:[0,6],brute_forc:3,brute_force_fibonacci:3,brute_force_fibonacci_test:3,can:[0,1,5,6],chang:[0,1,6],character:3,close:1,code:5,command:1,commit:[0,1,6],compar:[0,1,3,5,6],complet:[0,1,3,6],congratul:1,consequ:1,context:[4,5],context_manag:1,contextlib:1,contextmanag:1,creat:0,custom:5,cycl:5,databas:1,decor:[4,5],descript:[0,5,6],develop:5,directori:[0,1,5,6],don:1,done:0,driven:5,dynam:3,dynamic_fibonacci:3,dynamic_fibonacci_test:3,enjoi:5,enough:5,etc:5,everi:[3,5],everyth:1,exactli:1,exampl:[1,3,5],experi:5,fact:3,factor:5,fail:[0,1,3,5,6],failur:[0,5,6],fibonacci:4,file:[0,1,3,5,6],find:4,find_max:0,find_min:0,first:[0,1,3,6],folder:5,follow:[0,3],folter:1,forget:1,fortun:[0,5],four:5,from:[1,5],gener:1,given:0,going:0,gonna:5,good:0,have:[0,1,5,6],heart:5,hello:4,here:[0,3,5,6],hope:5,implement:[0,1,3,5,6],improv:5,instruct:5,integ:3,introduct:4,iter:5,job:0,kerbez:3,languag:5,later:1,lead:1,learn:[0,1,5,6],let:1,level:4,locat:[0,1,3,6],look:[0,1,3,6],magic:[1,4],magic_funct:6,make:[0,6],manag:[4,5],maximum:4,mean:5,method:3,mine:[0,1,3,6],minimum:4,modul:4,more:5,most:1,must:5,need:1,next:5,now:[0,1,3,6],number:[0,4],one:5,ones:3,onli:5,our:5,out:0,part:3,pass:[0,1,3,5,6],practic:5,preced:3,process:5,product:5,program:5,push:1,python3:[0,1,3,6],python:4,read:1,realiz:3,recurs:3,releas:1,reli:5,rememb:[1,5],repeat:[0,6],repetit:5,requir:5,resourc:1,root:5,run:[0,1,3,5,6],sai:1,second:5,see:[1,3],sequenc:3,should:[1,3,5],simpl:[0,6],smile:0,softwar:5,some:1,sort:1,specif:5,statement:1,step:[4,5,6],structur:4,sum:3,sure:[0,6],task:5,tdd:[0,4],test:[0,1,3,5,6],test_:5,test_find_max:0,test_find_min:0,test_numb:6,test_program:5,tests_for_level_on:1,them:[0,1,3,6],thi:[1,5],thing:0,those:5,three:1,todo:[0,1,6],turn:5,tutori:5,two:3,understand:1,unittest:[0,1,3,6],until:[0,6],use:0,used:1,using:1,veri:5,wai:1,want:[1,3],welcom:5,what:4,where:[1,5],which:5,wide:1,without:5,work:[0,1,6],write:[0,3,5],write_into_fil:1,written:5,you:[0,1,3,6],your:[0,1,3,5,6]},titles:["Baby steps","Context manager","Decorators","Fibonacci numbers","Modulus","Hello Python, Hi TDD!","Magic functions"],titleterms:{"function":6,babi:0,context:1,decor:2,fibonacci:3,find:0,hello:5,how:5,introduct:5,level:1,lucki:5,magic:6,manag:1,maximum:0,minimum:0,modul:5,modulu:4,number:[3,6],python:5,start:5,step:0,structur:5,tdd:5,what:5,you:5}})
\ No newline at end of file
+Search.setIndex({docnames:["baby_steps","context_manager","decorators","fibonacci_numbers","index","introduction","magic_functions"],envversion:{"sphinx.domains.c":1,"sphinx.domains.changeset":1,"sphinx.domains.cpp":1,"sphinx.domains.javascript":1,"sphinx.domains.math":1,"sphinx.domains.python":1,"sphinx.domains.rst":1,"sphinx.domains.std":1,sphinx:54},filenames:["baby_steps.rst","context_manager.rst","decorators.rst","fibonacci_numbers.rst","index.rst","introduction.rst","magic_functions.rst"],objects:{},objnames:{},objtypes:{},terms:{"case":5,"class":[0,3,4],"function":[0,1,4],"goto":5,"import":1,"new":5,"short":5,But:1,For:3,INTO:[],The:[1,3],__enter__:1,__exit__:1,__init__:1,about:1,advanc:5,after:3,all:[0,1,3,5,6],alloc:1,alreadi:0,answer:[0,1,3,5,6],approach:0,babi:4,baby_step:0,basic:5,befor:5,better:1,big:1,bla:[0,6],brute_forc:3,brute_force_fibonacci:3,brute_force_fibonacci_test:3,can:[0,1,5,6],chang:[0,4,6],change_directori:1,character:3,close:1,code:5,command:1,commit:[0,1,6],compar:[0,1,3,5,6],complet:[0,1,3,6],congratul:1,consequ:1,context:[4,5],context_manag:1,context_manager_as_class:1,contextlib:1,contextmanag:1,creat:0,custom:5,cycl:5,databas:1,decor:[4,5],descript:[0,5,6],develop:5,directori:[0,4,5,6],don:1,done:0,driven:5,dynam:3,dynamic_fibonacci:3,dynamic_fibonacci_test:3,enjoi:5,enough:5,etc:5,everi:[3,5],everyth:1,exactli:1,exampl:[1,3,5],experi:5,fact:3,factor:5,fail:[0,1,3,5,6],failur:[0,5,6],fibonacci:4,file:[0,3,4,5,6],find:4,find_max:0,find_min:0,first:[0,1,3,6],folder:[1,5],follow:[0,3],folter:1,forget:1,fortun:[0,5],four:5,from:[1,5],gener:1,given:0,going:0,gonna:5,good:0,have:[0,1,5,6],heart:5,hello:4,here:[0,3,5,6],hope:5,implement:[0,1,3,5,6],improv:5,instruct:5,integ:3,introduct:4,iter:5,job:0,kerbez:3,languag:5,later:1,lead:1,learn:[0,1,5,6],let:1,level:1,locat:[0,1,3,6],look:[0,1,3,6],magic:[1,4],magic_funct:6,make:[0,6],manag:[4,5],maximum:4,mean:5,method:3,mine:[0,1,3,6],minimum:4,modul:4,more:5,most:1,must:5,need:1,next:5,now:[0,1,3,6],number:[0,4],one:5,ones:3,onli:5,our:5,out:0,part:3,pass:[0,1,3,5,6],practic:5,preced:3,process:5,product:5,program:5,push:1,python3:[0,1,3,6],python:4,read:1,realiz:3,recurs:3,releas:1,reli:5,rememb:[1,5],repeat:[0,6],repetit:5,requir:5,resourc:1,root:5,run:[0,1,3,5,6],sai:1,second:[1,5],see:[1,3],sequenc:3,should:[1,3,5],simpl:[0,6],smile:0,softwar:5,some:1,sort:1,specif:5,statement:1,step:[4,5,6],structur:4,sum:3,sure:[0,6],task:5,tdd:[0,4],test:[0,1,3,5,6],test_:5,test_change_directori:1,test_context_manager_as_class:1,test_find_max:0,test_find_min:0,test_numb:6,test_program:5,tests_for_level_on:[],tests_write_into_fil:1,them:[0,1,3,6],thi:[1,5],thing:0,those:5,three:1,todo:[0,1,6],turn:5,tutori:5,two:3,understand:1,unittest:[0,1,3,6],until:[0,6],use:0,used:1,using:1,veri:5,wai:1,want:[1,3],welcom:5,what:4,where:[1,5],which:5,wide:1,without:5,work:[0,1,6],write:[0,3,4,5],write_into_fil:1,written:5,you:[0,1,3,6],your:[0,1,3,5,6]},titles:["Baby steps","Context manager","Decorators","Fibonacci numbers","Modulus","Hello Python, Hi TDD!","Magic functions"],titleterms:{"class":1,"function":6,INTO:[],babi:0,chang:1,context:1,decor:2,directori:1,fibonacci:3,file:1,find:0,hello:5,how:5,introduct:5,level:[],lucki:5,magic:6,manag:1,maximum:0,minimum:0,modul:5,modulu:4,number:[3,6],python:5,start:5,step:0,structur:5,tdd:5,what:5,write:1,you:5}})
\ No newline at end of file
diff --git a/docs/source/context_manager.rst b/docs/source/context_manager.rst
index 829d996..3a63868 100644
--- a/docs/source/context_manager.rst
+++ b/docs/source/context_manager.rst
@@ -24,10 +24,29 @@ or as class by using magic functions::
 
 We want you to pass three levels for a better understanding of **context manager**
 
+Context manager as class
+------------------------
 
+1. Look at the file context_manager_as_class.py
 
-LEVEL-1
--------
+2. Look at the test_context_manager_as_class.py in tests folder
+
+3. Run tests with command::
+
+    python3 -m unittest tests/test_context_manager_as_class.py
+
+   As you see all your tests are failed
+
+4. Now, complete the functions in context_manager_as_class.py
+
+5. Run tests and all of them should be passed.
+
+6. Compare your answer with mine located in answers/change_directory.py
+
+7. Congratulations, you have passed first level. Commit and push your changes.
+
+Write into file
+---------------
 
 1. Look at the file write_into_file.py
 
@@ -35,7 +54,7 @@ LEVEL-1
 
 3. Run tests with command::
 
-    python3 -m unittest tests/tests_for_level_one.py
+    python3 -m unittest tests/tests_write_into_file.py
 
    As you see all your tests are failed
 
@@ -47,6 +66,22 @@ LEVEL-1
 
 7. Congratulations, you have passed first level. Commit and push your changes.
 
-LEVEL-2
--------
+Change directory
+----------------
+1. Look at the file change_directory.py
+
+2. Look at the test_change_directory.py in tests folder
+
+3. Run tests with command::
+
+    python3 -m unittest tests/test_change_directory.py
+
+   As you see all your tests are failed
+
+4. Now, complete the functions in change_directory.py
+
+5. Run tests and all of them should be passed.
+
+6. Compare your answer with mine located in answers/change_directory.py
 
+7. Congratulations, you have passed second level. Commit and push your changes.