The program crashes while using PyQtWebEngine (original) (raw)

November 20, 2025, 1:04pm 1

Hello everyone!

My program worked flawlessly in both Windows and Ubuntu.

The platform is a Jetson Orin NX. Now the program breaks at the line:

web.page().setWebChannel(channel), without any error output.

I reinstalled the PyQt5 and PyQtPyQtWebEngine packages.

import sys
from PyQt5.QtWebEngineWidgets import *
from PyQt5.QtWidgets import QApplication
from PyQt5 import QtCore, QtWidgets, QtWebEngineWidgets, QtWebChannel

from pathlib import Path
import os


lst = [[76.8805471, 43.2201317], [76.8812433, 43.2205473], [76.8822508,43.2211566]]
k = -1

class Backend(QtCore.QObject):
    @QtCore.pyqtSlot(int, result=list)
    def getRef(self, x):
        global val, k
        print("inside getRef", x)
        k = k + 1
        if k == 2:      # 9
            k = -1
        s = lst[k]
        return s


backend = Backend()
app = QApplication(sys.argv)
channel = QtWebChannel.QWebChannel()
web = QWebEngineView()
web.page().setWebChannel(channel)                       # <------ !!!!!!!
channel.registerObject("backend", backend)

url = "test_work_3_only_map.html"
web.load(url)
web.resize(1280, 720)
web.show()
sys.exit(app.exec_())

What could be affecting the operation?

Help me please.

Thank you!

I just saw this message..

system Closed December 4, 2025, 3:01pm 5

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