diff --git a/examples/aiohttp_fetch.py b/examples/aiohttp_fetch.py
index 7de9e44..78eb029 100644
--- a/examples/aiohttp_fetch.py
+++ b/examples/aiohttp_fetch.py
@@ -1,22 +1,28 @@
-import sys
 import asyncio
 
 import aiohttp
-from qasync import run, asyncSlot, asyncClose
 
 # from PyQt5.QtWidgets import (
 from PySide2.QtWidgets import (
-    QWidget, QLabel, QLineEdit, QTextEdit, QPushButton,
-    QVBoxLayout)
+    QWidget,
+    QLabel,
+    QLineEdit,
+    QTextEdit,
+    QPushButton,
+    QVBoxLayout,
+)
+
+import qasync
+from qasync import asyncSlot, asyncClose
 
 
 class MainWindow(QWidget):
     """Main window."""
 
-    _DEF_URL = 'https://jsonplaceholder.typicode.com/todos/1'
+    _DEF_URL = "https://jsonplaceholder.typicode.com/todos/1"
     """str: Default URL."""
 
-    _SESSION_TIMEOUT = 1.
+    _SESSION_TIMEOUT = 1.0
     """float: Session timeout."""
 
     def __init__(self):
@@ -24,22 +30,23 @@ def __init__(self):
 
         self.setLayout(QVBoxLayout())
 
-        self.lblStatus = QLabel('Idle', self)
+        self.lblStatus = QLabel("Idle", self)
         self.layout().addWidget(self.lblStatus)
 
         self.editUrl = QLineEdit(self._DEF_URL, self)
         self.layout().addWidget(self.editUrl)
 
-        self.editResponse = QTextEdit('', self)
+        self.editResponse = QTextEdit("", self)
         self.layout().addWidget(self.editResponse)
 
-        self.btnFetch = QPushButton('Fetch', self)
+        self.btnFetch = QPushButton("Fetch", self)
         self.btnFetch.clicked.connect(self.on_btnFetch_clicked)
         self.layout().addWidget(self.btnFetch)
 
         self.session = aiohttp.ClientSession(
             loop=asyncio.get_event_loop(),
-            timeout=aiohttp.ClientTimeout(total=self._SESSION_TIMEOUT))
+            timeout=aiohttp.ClientTimeout(total=self._SESSION_TIMEOUT),
+        )
 
     @asyncClose
     async def closeEvent(self, event):
@@ -48,15 +55,15 @@ async def closeEvent(self, event):
     @asyncSlot()
     async def on_btnFetch_clicked(self):
         self.btnFetch.setEnabled(False)
-        self.lblStatus.setText('Fetching...')
+        self.lblStatus.setText("Fetching...")
 
         try:
             async with self.session.get(self.editUrl.text()) as r:
                 self.editResponse.setText(await r.text())
         except Exception as exc:
-            self.lblStatus.setText('Error: {}'.format(exc))
+            self.lblStatus.setText("Error: {}".format(exc))
         else:
-            self.lblStatus.setText('Finished!')
+            self.lblStatus.setText("Finished!")
         finally:
             self.btnFetch.setEnabled(True)
 
diff --git a/examples/executor_example.py b/examples/executor_example.py
index 6ca6f92..9e242a2 100644
--- a/examples/executor_example.py
+++ b/examples/executor_example.py
@@ -1,10 +1,11 @@
+import functools
 import sys
 import asyncio
 import time
+import qasync
 
 # from PyQt5.QtWidgets import (
-from PySide2.QtWidgets import (
-    QApplication, QProgressBar)
+from PySide2.QtWidgets import QApplication, QProgressBar
 from qasync import QEventLoop, QThreadExecutor
 
 
@@ -13,22 +14,22 @@ async def master():
     progress.setRange(0, 99)
     progress.show()
 
-    await first_50()
+    await first_50(progress)
     loop = asyncio.get_running_loop()
     with QThreadExecutor(1) as exec:
-        await loop.run_in_executor(exec, last_50, loop)
+        await loop.run_in_executor(exec, functools.partial(last_50, progress), loop)
 
 
-async def first_50():
+async def first_50(progress):
     for i in range(50):
         progress.setValue(i)
-        await asyncio.sleep(.1)
+        await asyncio.sleep(0.1)
 
 
-def last_50(loop):
+def last_50(progress, loop):
     for i in range(50, 100):
         loop.call_soon_threadsafe(progress.setValue, i)
-        time.sleep(.1)
+        time.sleep(0.1)
 
 
 qasync.run(master())