python之常量和变量

时间：2022-09-05 16:56:41

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

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