Code examples are as follows:
import types # use MethodType method requires introduction package
class test (object): # define a test class, comprising a name attribute and f () method
def __init__(self, name):
self.name = name
def f(self):
print("test")
#__slots__ = ( 'name') # phrase fixing the test properties of an object class is only name ,
# Is not allowed to have other properties
def test2 (self): # define a function, ready to add to the test object class
print("name:%s"%self.name)
a = test ( " Wang ")
a.f()
a.age = 18 # moving as a target attribute is added, if the setting __slots__ property, these words being given
print ( ' Age: % D' a.age%)
a.test2 = types.MethodType (test2, a) # dynamically add method, test2 bound method to a on the object
a.test2 ()