Sync pyqt-calculator-tutorial with the updated tutorial

pyqt-calculator-tutorial/README.md

@@ -1,6 +1,6 @@
 # Python and PyQt: Building a GUI Desktop Calculator
 
-This folder provides the code examples for the article [Python and PyQt: Building a GUI Desktop Calculator](https://realpython.com/python-and-pyqt-building-a-gui-desktop-calculator/).
+This folder provides the code examples for the article [Python and PyQt: Building a GUI Desktop Calculator](https://realpython.com/python-pyqt-gui-calculator/).
 
 ## Folder Content
 

pyqt-calculator-tutorial/examples/main_window.py

@@ -26,8 +26,8 @@ def _createMenu(self):
 
     def _createToolBar(self):
         tools = QToolBar()
-        self.addToolBar(tools)
         tools.addAction("Exit", self.close)
+        self.addToolBar(tools)
 
     def _createStatusBar(self):
         status = QStatusBar()

pyqt-calculator-tutorial/examples/signal_slots.py

@@ -15,7 +15,7 @@ def greet():
     if msgLabel.text():
         msgLabel.setText("")
     else:
-        msgLabel.setText("Hello World!")
+        msgLabel.setText("Hello, World!")
 
 
 app = QApplication([])

pyqt-calculator-tutorial/pycalc/README.md

@@ -10,12 +10,12 @@ PyCalc is intended to be a demonstrative example of how to build a Python + PyQt
 
 ## Requirements
 
-For PyCalc to work, you need to have [Python](https://www.python.org) >= 3.6.1. Then you need to install the PyQt6 library. You can do this by using `pip` in a Python virtual environment:
+For PyCalc to work, you need to have [Python](https://www.python.org) 3.10 or later. Then you need to install the PyQt6 library. You can do this by using `pip` in a Python virtual environment:
 
 ```console
 $ python -m venv venv
 $ source venv/bin/activate
-$ python -m pip install pyqt6
+$ python -m pip install pyqt6==6.12.0
 ```
 
 After these commands have finished, you can run PyCalc as described in the next section.

pyqt-calculator-tutorial/pycalc/requirements.txt

@@ -1 +1 @@
-PyQt6>=6.3.1
+PyQt6==6.12.0