how class attributes created in python code example

Example: 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