Python QT findChildren does not find any children from UI file

Question

I have a UI file like this

 RoverPlanner
 

        

Answer 1

I ever encountered a similar problem and the cause was that the library used some wrapper like python_qt_binding but another part of the code used PyQt5 or PySide2. Why does that happen? because wrappers create new classes that use the same code base but in the end they are different classes.

My recommendation is that if you are going to use python_qt_binding then no longer use pyqt5 or pyside2 directly but rather the wrapper, in your case you should use the following:

import os

from argparse import ArgumentParser

import rospy
import rospkg

from qt_gui.plugin import Plugin

from python_qt_binding.QtWidgets import QWidget, QTreeView, QPushButton, QFileDialog
from python_qt_binding import loadUi

# ....