Install Python from: https://www.python.org/downloads/windows/
Install PyQt using pip:
pip3 install PyQt5
Create a file with the following code:
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QVBoxLayout
app = QApplication([])
window = QWidget()
layout = QVBoxLayout()
layout.addWidget(QPushButton('Top'))
layout.addWidget(QPushButton('Bottom'))
window.setLayout(layout)
window.show()
app.exec_()
Execute the code:
python file.py