python class objects and instance objects dynamically add method of share

Examples are as follows:

class Person():
 def __init__(self, name):
  self.name = name

def print_name(self):
 print(self.name)
p = Person('Li')
import types
p.print_name = types.MethodType(print_name, p) #  Bind a function to an object 
p.print_name()

@staticmethod
def print_abc():
 print('abc')
Person.print_abc = print_abc
Person.print_abc()

@classmethod
def print_123(cls):
 print('123')
Person.print_123 = print_123
Person.print_123()