什么是命名空间 == 对一个名字起作用的范围

# def test():
# print("----test----")

# import test
# test.test()

# from test import *

# LEGB规则 locals > enclosing function > globals > builtins(内件)# 查看内件 dir(__builtins__)
# L局部变量
# enclosing 闭包

a = 100 #全局变量

def test():
b = 200 #局部变量
print(locals)

# globals 查看全局变量
# locals 查看局部变量

# num = 100
# def test():
# num = 200
# print(num)

# test() #200

# 闭包
# num = 100
# def test1():
# num = 200
# def test2():
# # num = 300
# print(num)
# return test2

# ret = test1()
# ret()