Object oriented programming

Source: Corey Schafer, Youtube, GitHub code

• Everything is an ‘Object’ in python
• We can create own objects, ‘classes’
• In class:
  • function -> method
  • variable -> attribute
• Class <-> instance of a class is not the same.
  • The class itself is a blueprint, a template for generating instances.
  • class variable vs. instance variable
• ‘self’ argument:
  • The instance itself
  • passed automatically
• __init__(self)
  • super() Detailed video on super

Part 2

Python docs: Special methods

Text representation

When we call the print statement, Python first looks for the __str__ method defined in your class before falling back on the __repr__ method.

• __repr__
• __str__

Math

Python docs: Numeric types

• __add__
• __sub__
• __mul__
• __truediv__
• …

Context manager

RealPython article

Alternative constructor

Getter_setter

@property decorator