PyQt5：如何使单击后的按钮关闭GUI

Question

Here is my code for the click button:

run_btn=QtWidgets.QPushButton("Run")
def main():
    print ('Starting Program')
run_btn.clicked.connect(main)

But after I click "Run", it just prints "Starting Program" again and again, and the GUI window doesn't disappear:

How can I make the button print it once and go on with the program ?

I am using PyQt5 and Python 3.4.0

Answer 1

Suppose that the QPushButton is inside the main widget (in the example QWidget ), to close the window we use the close()

from PyQt5 import QtWidgets
import sys

app = QtWidgets.QApplication(sys.argv)
w = QtWidgets.QWidget()

line1_edit = QtWidgets.QLineEdit()
line2_edit = QtWidgets.QLineEdit()

run_btn=QtWidgets.QPushButton("Run")
def main():
    print ('Starting Program')
    w.close()

run_btn.clicked.connect(main)

layout = QtWidgets.QVBoxLayout()
layout.addWidget(line1_edit)
layout.addWidget(line2_edit)
layout.addWidget(run_btn)
w.setLayout(layout)
w.show()
sys.exit(app.exec_())