how to use pyqt5 properly code example

Example 1: install pyqt5

pip install PyQt5

Example 2: Python PyQt5

# pip install PyQt5==5.15.2
from PyQt5.QtWidgets import QApplication,QMainWindow,QLabel
import sys
app=QApplication(sys.argv)
app.setStyle('Fusion')
app.setApplicationName('PyQt5 App')
win=QMainWindow()
label=QLabel()
label.setText('An App')
win.setCentralWidget(label)
win.show()
sys.exit(app.exec_())