[Python] How do I call methods of a PyQt5 QMainWindow subclass (like go_back) from another...

I've created a simple web browser using PyQt5 in a file called browser.py. Here's a snippet of the code:

# browser.py
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtWebEngineWidgets import *

class MainWindow(QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.browser = QWebEngineView()
self.browser.setUrl(QUrl('http://google.com'))
self.setCentralWidget(self.browser)
self.showMaximized()

def go_back(self):
self.browser.back()

def go_forward(self):
self.browser.forward()


Now in another file main.py, I'm importing the MainWindow class like this:

from browser import MainWindow


My question is: how do I call methods like go_back() from main.py? I’m a bit confused about how to handle the self in those method definitions when calling them externally.

Any help is appreciated!

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