Level 2: PyQt Lab 4

In this tutorial, we will be covering PyQt and building a simple application using PyQt with two levels. We will be creating a simple lab4 example. PyQt is a set of Python bindings for the Qt application framework and runs on all platforms supported by Qt including Windows, macOS, and Linux.

Level 1:
First, let’s start by installing PyQt if you haven’t already. You can install PyQt using pip by running the following command:

pip install PyQt5

Now, let’s create a simple application with a window that displays a label.

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel

app = QApplication(sys.argv)

widget = QWidget()
widget.setWindowTitle("Lab4 Example")
widget.setGeometry(100, 100, 400, 200)

label = QLabel("Level 1", widget)
label.move(100, 100)

widget.show()

sys.exit(app.exec_())

This code creates a simple PyQt application with a window displaying a label saying "Level 1".

Level 2:
Now, let’s add another level to our application. We will add a button that when clicked changes the label text.

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QPushButton

def on_button_click():
    label.setText("Level 2")

app = QApplication(sys.argv)

widget = QWidget()
widget.setWindowTitle("Lab4 Example")
widget.setGeometry(100, 100, 400, 200)

label = QLabel("Level 1", widget)
label.move(100, 100)

button = QPushButton("Change Level", widget)
button.move(100, 150)
button.clicked.connect(on_button_click)

widget.show()

sys.exit(app.exec_())

In this code, we added a button to the window. When the button is clicked, it calls the on_button_click function which changes the label text to "Level 2".

This is a simple example of creating a two-level PyQt application. You can customize and add more functionality to this application by implementing more complex logic and adding more widgets. PyQt provides a wide range of widgets and tools to create powerful and user-friendly applications.

I hope this tutorial has helped you understand how to create a two-level PyQt application. Feel free to experiment and customize the code to create your own PyQt applications.