python中的常量和变量代码详解

# 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