python class atribute code example

Example 1: class python

class MyClass(object):
  def __init__(self, x):
    self.x = x

Example 2: class attributes in python

class MyClass:
  # Class attributes are defined outside of constructor
  class_attr = 0
  
  def __init__(self, inst):
    # Instance attributes are defined in the constructor
    self.instance_attr = inst
    
obj = MyClass(1)
print(obj.class_attr) # outputs 0
print(obj.instance_attr) # outputs 1
print(MyClass.class_attr) # outputs 0
print(MyClass.instance_attr) # raises AttributeError

Example 3: python class

class Dog(object):
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def speak(self):
        print("Hi I'm ", self.name, 'and I am', self.age, 'Years Old')

JUB0T = Dog('JUB0T', 55)
Friend = Dog('Doge', 10)
JUB0T.speak()
Friend.speak()

Example 4: python classmethod

# classmethod example
In [20]: class MyClass:
    ...:     @classmethod
    ...:     def set_att(cls, value):
    ...:         cls.att = value
    ...:

In [21]: MyClass.set_att(1)

In [22]: MyClass.att
Out[22]: 1

In [23]: obj = MyClass()

In [24]: obj.att
Out[24]: 1

In [25]: obj.set_att(3)

In [26]: obj.att
Out[26]: 3

In [27]: MyClass.att
Out[27]: 3

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