Type Error: QApplication(List[str]): not enough arguments

Question

Disclaimer: I am relatively new to programming, and especially new to Python. I am trying to learn to build a GUI with PyQt5 and I keep receiving the error "Type Error: QApplication(List[str]): not enough arguments" when trying to launch my application... I don't see any arguments that would make sense to use, and the ones that I have tried(that would be valid) then cause it to say " module.init() takes at most 2 arguments (3 given)"

import sys
from PyQt5 import QtWidgets, QtGui

class Main(QtWidgets.QApplication):
    def __init__(self):
        super(Main, self).__init__()
        self.setGeometry(100, 100, 300, 500)
        self.setWindowTitle('HelloWorld')
        self.setWindowIcon(QtWidget.QIcon('Image.png'))
        self.show()

app = QtWidgets.QApplication(sys.argv)
gui = Main()
sys.exit(app.exec_())

Answer 1

Viewing your code I noticed that you are confusing QApplication with some Widget.

The QApplication class manages the GUI application's control flow and main settings. It's Not a Widget.

In your case you could use a widget, for example:

import sys
from PyQt5 import QtWidgets, QtGui

class Main(QtWidgets.QWidget):
    def __init__(self):
        super(Main, self).__init__()
        self.setGeometry(100, 100, 300, 500)
        self.setWindowTitle('HelloWorld')
        self.setWindowIcon(QtGui.QIcon('Image.png'))
        self.show()

app = QtWidgets.QApplication(sys.argv)
gui = Main()
sys.exit(app.exec_())

Note: I have changed self.setWindowIcon(QtWidget.QIcon('Image.png')) to self.setWindowIcon(QtGui.QIcon('Image.png'))