python变量和常量_python中的常量和变量代码详解

局部和全局变量：

# name='lhf'

# def change_name():

# # global name

# name='帅了一比'

# print('change_name',name)

#

#

# change_name()

# print(name)

# name='lhf'

#

# def change_name():

# name1='帅了一比'

# name2='帅了一比'

# name3='帅了一比'

# print('change_name',name)

#

# change_name()

# globals

# NAME = "杠娘"

#

# def yangjian():

# # NAME = "史正文"

# global NAME

# NAME = "小东北"

# print('我要搞', NAME)

#

# def qupengfei():

# NAME = "基"

# print('我要搞', NAME)

#

# yangjian()

# qupengfei()

# NAME = "产品经理"

# def yangjian():

# # NAME = "史正文"

# global NAME # 已经声明，ＮＡＭＥ就是全局的的那个变量

# print('我要搞', NAME)

# NAME = "小东北" # 修改 全局的变量

# print('我要搞', NAME)

# def qupengfei():

# NAME = "基"

# print('我要搞', NAME)

# 如果函数的内容无global关键字，

# - 有声明局部变量

# NAME = ["产品经理","廖波湿"]

# def qupengfei():

# NAME = "自己"

# print('我要搞', NAME)

# qupengfei()

# - 无声明局部变量

# NAME = ["产品经理","廖波湿"]

# def qupengfei():

# NAME.append('XXOO')

# print('我要搞', NAME)

# qupengfei()

# 如果函数的内容有global关键字

# - 有声明局部变量

# NAME = ["产品经理","廖波湿"]

# def qupengfei():

# global NAME

# NAME = "自己"

# print('我要搞', NAME)

# qupengfei()

# 错误示例

# NAME = ["产品经理","廖波湿"]

# def qupengfei():

# NAME = "自己"

# global NAME

# print('我要搞', NAME)

# qupengfei()

# - 无声明局部变量

# NAME = ["产品经理","廖波湿"]

# def qupengfei():

# global NAME

# NAME = ["阿毛"]

# NAME.append('XXOO')

# print('我要搞', NAME)

# qupengfei()

######## 全局变量变量名大写

######## 局部变量变量名小写

# 优先读取局部变量，能读取全局变量，无法对全局变量重新赋值 NAME=“fff”，

# 但是对于可变类型，可以对内部元素进行操作

# 如果函数中有global关键字，变量本质上就是全局的那个变量，可读取可赋值 NAME=“fff”

# qupengfei()

# yangjian()

NAME = ["产品经理","廖波湿"]

# def yangjian():

# # NAME = "史正文"

# global NAME # 已经声明，ＮＡＭＥ就是全局的的那个变量

# print('我要搞', NAME)

# NAME = "小东北" # 修改 全局的变量

# print('我要搞', NAME)

# def qupengfei():

# # NAME = "aS"

# NAME.append('天扎龙')

# print('我要搞', NAME)

#

# qupengfei()

# NAME = ["产品经理","廖波湿"]

# def qupengfei():

# name = "自己"

# global NAME

# print('我要搞', NAME)

# qupengfei()

# NAME = '海风'

#

# def huangwei():

# name = "黄伟"

# print(name)

# def liuyang():

# name = "刘洋"

# print(name)

# def nulige():

# name = '沪指花'

# print(name)

# print(name)

# nulige()

# liuyang()

# print(name)

#

# huangwei()

# name = "刚娘"

#

# def weihou():

# name = "陈卓"

# def weiweihou():

# nonlocal name # nonlocal，指定上一级变量，如果没有就继续往上直到找到为止

# name = "冷静"

#

# weiweihou()

# print(name)

#

# print(name)

# weihou()

# print(name)

# 刚娘

# 冷静

# 刚娘

总结

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本文标题: python中的常量和变量代码详解

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