[FIXED] Closing opened Selenium Browser closes PyQt Main Window too

Issue

The code provided opens a PyQt5 Window in which the user can start a selenium browser. The problem is that when I close the browser, the main window will close too.

test.py

from PyQt5 import QtWidgets
from selenium import webdriver
import sys, json


def isRunning(driver):
    try:
        driver.window_handles
        return True
    except Exception:
        return False


def handleButton2():
    print("test")


app = QtWidgets.QApplication(sys.argv)


def handleButton():
    profile = webdriver.FirefoxProfile('selenium')
    driver = webdriver.Firefox(profile)
    driver.get('https://duckduckgo.com/')
    logs = []
    curr = ''
    while isRunning(driver):
        if curr != driver.current_url:
            logs = []
            curr = driver.current_url
        log = driver.execute_script(
            "return window.performance.getEntries();")
        for x in log:
            if x not in logs:
                logs.append(x)
                s = str(x).replace("'", '"')
                s = s.replace(': "', ': ').replace('", ', ', ')
                s = s.replace(': ', ': "').replace(', ', '", ')
                s = s.replace('"}', '}').replace('}', '"}')
                s = s.replace(': "[', ': [').replace(': "{', ': {')
                s = s.replace(']"', ']').replace('}"', '}')
                print(s)
                url = json.loads(s)['name']
                if url.startswith('http'):
                    print(url)
        app.processEvents()  # VERY important


class Window(QtWidgets.QWidget):
    def __init__(self):
        super().__init__()
        self.button = QtWidgets.QPushButton('Test')
        self.button.clicked.connect(handleButton)
        self.button2 = QtWidgets.QPushButton('Test2')
        self.button2.clicked.connect(handleButton2)
        layout = QtWidgets.QVBoxLayout(self)
        layout.addWidget(self.button)
        layout.addWidget(self.button2)


def mainGUI():
    window = Window()
    window.show()
    sys.exit(app.exec_())


if __name__ == '__main__':
    mainGUI()

I know that the while loop stopping is causing this but i don't know how to fix it. I've tried to re-open the window after the loop stops but that didn't work.

Solution

Avoid blocking the main event loop caused by the while loop in handleButton. Instead, use Qt's QTimer to periodically check if the browser window is open. Customize the timer interval to suit your application's needs.

Answered By - aazizzailani