diff --git a/500 - Python style/README.md b/500 - Python style/README.md
index 87dfc3e..a38e5b8 100644
--- a/500 - Python style/README.md	
+++ b/500 - Python style/README.md	
@@ -45,6 +45,8 @@ import this
 >
 > In particular: do not break backwards compatibility just to comply with this PEP!
 
+### [🎵 The PEP 8 Song 🎵]
+
 ### What is Lint?
 > In computer programming lint or lint-like tools performing static analysis of
 > source code checking for symantec discrepancies.
@@ -52,11 +54,25 @@ import this
 > “Linting” means running a basic quality tool against your code.
 > The tool will check your code syntax and provide instructions on how to clean it.
 
-Python Lint tools:
+From [What is Flake8 and why we should use it?]
+
+#### Python Lint tools:
 * [flake8]
 * [pylint]
+* [black]
+
+```shell
+# in env
+pip install flake8 pylint
+flake8 ugly_module
+# flake8 is complaining
+pylint ugly_module
+# pylint is complaining even more
+black ugly_module
+# black makes some changes
+```
+* [ugly_exercise.py](ugly_module/ugly_exercise.py)
 
-### [🎵 The PEP 8 Song 🎵]
 
 ## Exercises:
 * [enum_exercise.py](enum_exercise.py)
@@ -65,7 +81,8 @@ Python Lint tools:
 [PEP 8 - Style Guide for Python Code]: https://www.python.org/dev/peps/pep-0008/
 [PEP 20 - The Zen of Python]: https://www.python.org/dev/peps/pep-0020/
 [PEP 8 — the Style Guide for Python Code (for humans)]: https://pep8.org/
+[🎵 The PEP 8 Song 🎵]: https://www.youtube.com/watch?v=hgI0p1zf31k
 [What is Flake8 and why we should use it?]: https://medium.com/python-pandemonium/what-is-flake8-and-why-we-should-use-it-b89bd78073f2
 [flake8]:https://flake8.pycqa.org/en/latest/
 [pylint]: https://pylint.org/
-[🎵 The PEP 8 Song 🎵]: https://www.youtube.com/watch?v=hgI0p1zf31k
+[black]: https://pypi.org/project/black/
diff --git a/500 - Python style/ugly_module/__init__.py b/500 - Python style/ugly_module/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/500 - Python style/ugly_module/ugly_exercise.py b/500 - Python style/ugly_module/ugly_exercise.py
new file mode 100644
index 0000000..28c8c20
--- /dev/null
+++ b/500 - Python style/ugly_module/ugly_exercise.py	
@@ -0,0 +1,28 @@
+import os
+
+fileToDump = 'duped_class.json'
+
+from random import randint
+
+class SomeClass:
+    def __init__(self, ATTR1, attr2):
+        self.ATTR1 = ATTR1
+        self.attr2 = attr2
+
+    def printAttributes(self):
+        print(f'attrs: {self.ATTR1}, {self.attr2}')
+
+class inheritedClass(SomeClass):
+    def printAttributes(self):
+        print(f"attrs: {self.attr2}, {self.ATTR1}")
+
+def generate_int() -> str:
+    return randint(0, 10)
+
+if __name__ == '__main__':
+    Number = generate_int()
+    classInstance = SomeClass(Number, 'other attribute')
+    classInstance.printAttributes()
+
+    subclassInstance = inheritedClass(Number, "other attribute")
+    subclassInstance.printAttributes()
diff --git a/510 - Requests/README.md b/510 - Requests/README.md
index e2cebda..6cdd6be 100644
--- a/510 - Requests/README.md	
+++ b/510 - Requests/README.md	
@@ -71,9 +71,9 @@ print(curl.parse(response3))
 
 #### Result:
 ```
-curl -X POST -H 'Accept: */*' -H 'Accept-Encoding: gzip, deflate' -H 'Connection: keep-alive' -H 'Content-Type: application/x-www-form-urlencoded' -H 'User-Agent: python-requests/2.28.0' -d 'title=t&body=b&userId=1' https://jsonplaceholder.typicode.com:443/posts
-curl -X POST -H 'Accept: */*' -H 'Accept-Encoding: gzip, deflate' -H 'Connection: keep-alive' -H 'User-Agent: python-requests/2.28.0' -d '{"title": "t", "body": "b", "userId": 1}' https://jsonplaceholder.typicode.com:443/posts
-curl -X POST -H 'Accept: */*' -H 'Accept-Encoding: gzip, deflate' -H 'Connection: keep-alive' -H 'Content-Type: application/json' -H 'User-Agent: python-requests/2.28.0' -d '{"title": "t", "body": "b", "userId": 1}' https://jsonplaceholder.typicode.com:443/posts
+curl -X POST -H ... -H 'Content-Type: application/x-www-form-urlencoded' -H 'User-Agent: python-requests/2.28.0' -d 'title=t&body=b&userId=1' https://jsonplaceholder.typicode.com:443/posts
+curl -X POST -H ... -H 'User-Agent: python-requests/2.28.0' -d '{"title": "t", "body": "b", "userId": 1}' https://jsonplaceholder.typicode.com:443/posts
+curl -X POST -H ... -H 'Content-Type: application/json' -H 'User-Agent: python-requests/2.28.0' -d '{"title": "t", "body": "b", "userId": 1}' https://jsonplaceholder.typicode.com:443/posts
 ```
 
 ## Fake REST API [{JSON} Placeholder][]