OOP in Python

Question 1

What are the two main things every class has?

Answer 1

Attributes and Methods

Question 2

What is the syntax of creating a class in Python

Answer 2

class <name>:</name>

Question 3

What is a constructor? How is it written?

Answer 3

A constructor is a method that is called when an object is created

def __init__(self):
you can add more parameters

Question 4

How do I make an attribute of the class?
How do I make it private?

Answer 4

self.variable
self.\_\_variable

Question 5

What happens when you try to access private attributes?

Answer 5

AttributeError

Question 6

What is a crucial parameter that all methods of a class must have (unless it is static)?

Answer 6

def <func> (self)
the 'self' parameter</func>

Question 7

What is a static method?

Answer 7

It is a method that can be called with the need of an object, mainly used for class utilities:
@staticmethod
def <func_name>():</func_name>

called using class name

<class>.<func>()
</func></class>

Question 8

What if I want the parameters to be unchangeable (read-only)?

Answer 8

@property
def <var>(self):
return self.\_\_<var></var></var>

Question 9

How to override the string representation method?

Answer 9

def __str__(self):
output = ‘ ‘
return output