This question already has answers here:
Understanding Python super() with __init__() methods [duplicate]
(7 answers)
Closed 11 months ago.
Here is the screenshot of our code
This a constructor for webdriver.Chrome
Please go and see in your webdriver.Chrome class we have constructor called __init__(self) magic method,
Now whenever you create an object for the Booking Class it will automatically invoke the child class constructor and parent class constructor
Note: Here super is a keyword for the invoking parent class constructor
So that's why you're using super(Booking, self).init()
Related
This question already has answers here:
using super without inheritance class in python3
(3 answers)
Closed 2 years ago.
I was looking at a code which a Parent class calls super:
class ParentClass:
def __init__(self):
super(ParentClass, self).__init__()
I don't understand why would someone call super on itself and how does this not get stuck on a recursive loop. Is there something in the background of Python mechanisms that I'm missing?
In python, all classes are implicitly a subclass of object. super will always follow a Method Resolution Order (mro) to determine which function to call. This is explained well in the super docs.
So, for a class like-
class ParentClass:
def __init__(self):
super(ParentClass, self).__init__()
The mro follows - ParentClass -> object
Which means super(ParentClass, self) (or the shorthand, super()) translates to object and object.__init__() is indeed a very valid call.
This question already has answers here:
Making functions non override-able
(6 answers)
Prevent function overriding in Python [duplicate]
(3 answers)
How to prevent a function from being overridden in Python [duplicate]
(4 answers)
Closed 3 years ago.
With python abstract classes, is there a way to require that a class instance does not override a particular method?
Using the #abstractmethod decorator on a method requires the child class to define the method. Skipping the #abstractmethod decorator allows the child to skip defining the method and "silently inherent" the abstract method. What I'd like is something like a #onlyabstractmethod to decorate a method that I want to ensure the child does not override.
This question already has answers here:
Python - Why call methods during __init__()
(3 answers)
Closed 6 years ago.
I wanted to call class member functions to initialize the class members completely in init. items_left and rat_initialize are the member functions I am using to initialize all the members of the class instance correctly. Is it alright to do so?
class Maze:
""" A 2D maze. """
# Write your Maze methods here.
def __init__(self,maze,rat_1,rat_2):
self.maze = maze
self.rat_1 = rat_1
self.rat_2 = rat_2
self.num_sprouts_left = 0
self.items_left(maze)
self.rat_initialize(maze,rat_1,rat_2)
Yes you can do it. When __init__ is called, the object is already instantiated by this point all the methods are available.
Actual object instantitation takes place in __new__ and __init__ is only called after it. You have accesss to other functions from inside __init__.
This question already has answers here:
What does object's __init__() method do in python? [duplicate]
(3 answers)
Closed 9 years ago.
class subclass(superclass):
def __init__(self, arg1, arg2):
superclass.__init__(self, blah1, blah2)
What is the purpose of using superclass.__init__(self, blah1, blah2)?
I am a little confused regarding whether to use the last line or not while inheriting a superclass.
superclass.__init__(self,*args,**kwargs)
is essentially equivelent to
super(Myclass,self).__init__(*args,**kwargs)
that is it calls the supers constructor. but it skips the rest of the inheritance stack (I think super() bubbles or something... most of the time i use the first method)
**this is probably an over simplification
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
python class inherits object
In Python 2.7, what is the difference between:
class MyClass(Object):
and
class MyClass:
What does the Object do?
The Object in this case the base class of MyClass, meaning that it 'inherits' the methods and variables of Object unless overwritten. Inheriting from object, however, creates a 'new-style class' as opposed to an 'old-style class'. For more information, see jozzas' comment
See this tutorial for information about inheritance.