Как установить pyqt5 в Windows
pip install PyQt5
pip install pyqt-tools
# if PyQt5 Designer not installed
pip install PyQt5Designer
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pip install PyQt5
pip install pyqt-tools
# if PyQt5 Designer not installed
pip install PyQt5Designerfrom PyQt5 import QtWidgets
from PyQt5.QtWidgets import QApplication, QMainWindow, QLabel
import sys
def main():
app = QApplication(sys.argv)
win = QMainWindow()
win.setGeometry(200,200,300,300)
win.setWindowTitle("My first window!")
label = QLabel(win)
label.setText("my first label")
label.move(50, 50)
win.show()
sys.exit(app.exec_())
main() # make sure to call the functionpip install PyQt5
pip install pyqt5-tools