如何在PyQt5中从头开始制作按钮？

from PyQt5.QtWidgets import QApplication, QWidget, QPushButton
from PyQt5.QtCore import Qt

app = QApplication([])
window = QWidget()
window.setWindowTitle("Button Example")

button = QPushButton("Click me", window)
button.setGeometry(100, 50, 200, 50)  # 设置按钮的位置和大小
button.setToolTip("This is a button")  # 设置鼠标悬停时的提示信息

def on_button_clicked():
    print("Button clicked!")

button.clicked.connect(on_button_clicked)  # 将按钮的点击事件与处理函数关联

window.show()
app.exec_()