Classes

Python is an object oriented programming language.

class MyClass:
  x = 5

  def __init__(self, name, age):
    self.name = name
    self.age = age

  def myfunc(self):
    print("Hello my name is " + self.name)

p1 = MyClass()
print(p1.x)

Note

The self parameter is a reference to the current instance of the class, and is used to access variables that belong to the class.

It does not have to be named self , you can call it whatever you like, but it has to be the first parameter of any function in the class:

init()

executed when the class is being initiated

str()

controls what should be returned when the class object is represented as a string

Modify Props

You can modify properties on objects like this:

p1.age = 40

Delete prop

del p1.age

Delete Object

del p1

pass Statement

Inheritance

Parent class is the class being inherited from, also called base class.

Child class is the class that inherits from another class, also called derived class

Create Child

class Student(Person):
  def __init__(self, fname, lname):
    super().__init__(fname, lname)  # or use can call directly Person.__init__(self, fname, lname)
    self.graduationyear = 2019