Q:

What is the purpose of using python `super() `, inside `__init__ ` other than the inheritance?

I found this simple program in a Youtube tutorial which is used QtSide modules with python. Basically what it does is connect QLineEdit to a QTextBrowser. As you can see below, the entire program handled by single class. I have basic idea of super() function which is used in multiple inheritance. So here, I don't understand what super(Form, self).__init__(parent) statement does. I tried running the same program after commenting that statement which produced below error message.
Error:
Traceback (most recent call last):
  File "/home/dazz/Projects/PycharmProjects/FirstTutorial/a2_gui.py", line 35, in <module>
    form = Form()
  File "/home/dazz/Projects/PycharmProjects/FirstTutorial/a2_gui.py", line 17, in __init__
    self.setLayout(layout)
RuntimeError: '__init__' method of object's base class (Form) not called.

Program code:
import sys
from PySide.QtCore import *
from PySide.QtGui import *

class Form(QDialog):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        self.browser = QTextBrowser()
        self.lineEdit = QLineEdit()

        layout = QVBoxLayout()
        layout.addWidget(self.browser)
        layout.addWidget(self.lineEdit)
        self.setLayout(layout)

        self.lineEdit.returnPressed.connect(self.update_ui)
        self.setWindowTitle('Calculate')

    def update_ui(self):
        try:
            text = self.lineEdit.text()
            self.browser.append('%s = %s' % (text, eval(text)))
            self.lineEdit.selectAll()

        except:
            self.browser.append('%s is invalid!' % text)

app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

Here, what is the use of super()?
I found a question which may related to this. But it's not clear to me.

A:

super() is used is inheritance, multiple or otherwise, to call methods that may have been overridden in the current class.
Here super() is used to call the original __init__ method defined for QDialog or a parent class of that. Not calling the original probably will have consequences as that original method does work you don't want to have to replicate in your own __init__ method.
super() makes multiple inheritance easier and more flexible to deal with, but it is not just for multiple inheritance.

