def ask(name="ask_wzh"):

     print(name)

 class Person:

     def __init__(self):

         print("Person_wzh")

 # 函数赋值给变量

 my_fun = ask

 my_fun("王智豪")   # 王智豪

 # 类赋值给变量

 my_class = Person

 my_class()      # Person_wzh

 # 添加到集合对象之中

 obj_list = []

 obj_list.append(ask)

 obj_list.append(Person)

 for item in obj_list:

     print(item())  # ask_wzh，None，Person_wzh，<__main__.Person object at 0x033DC4C0>

 # 作为参数和返回值

 def decorator_func(fun):

     print("dec start")

     return fun

 dec_func = decorator_func(ask)  # dec start

 dec_func()  # ask_wzh

 # -*- coding: utf-8 -*-

 __author__ = 'bobby'

 a = 1

 b = "abc"

 print(type(1))  # <class 'int'>

 print(type(int))  # <class 'type'>

 print(type(b))  # <class 'str'>

 print(type(str))  # <class 'type'>

 class Student:

     pass

 stu = Student()

 print(type(stu))  # <class '__main__.Student'>

 print(type(Student))  # <class 'type'>

 print(int.__bases__)  # (<class 'object'>,)

 print(str.__bases__)  # (<class 'object'>,)

 print(Student.__bases__)  # (<class 'object'>,)

 print(type.__bases__)  # (<class 'object'>,)

 print(object.__bases__)  # ()

 print(type(object))  # <class 'type'>

 print(type(type))   # <class 'type'>

 # 所有类的类型(包括type类)都是type

 # 所有类的最上层基类是object类

 # type也是一个类，同时type也是一个对象

 # id:内存地址

 a = 1

 id(a)

 # None全局只有一个

 a = None

 b = None

 print(id(a) == id(b))   # true