python中的常量和變量代碼詳解
更新時間:2018年07月25日 10:03:34 作者:有猿人
這篇文章主要介紹了python中的常量和變量,通過實例代碼給大家介紹了局部和全局變量,需要的朋友參考下吧
局部和全局變量:
# name='lhf' # def change_name(): # # global name # name='帥了一比' # print('change_name',name) # # # change_name() # print(name) # name='lhf' # # def change_name(): # name1='帥了一比' # name2='帥了一比' # name3='帥了一比' # print('change_name',name) # # change_name() # globals # NAME = "杠娘" # # def yangjian(): # # NAME = "史正文" # global NAME # NAME = "小東北" # print('我要搞', NAME) # # def qupengfei(): # NAME = "基" # print('我要搞', NAME) # # yangjian() # qupengfei() # NAME = "產(chǎn)品經(jīng)理" # def yangjian(): # # NAME = "史正文" # global NAME # 已經(jīng)聲明,NAME就是全局的的那個變量 # print('我要搞', NAME) # NAME = "小東北" # 修改 全局的變量 # print('我要搞', NAME) # def qupengfei(): # NAME = "基" # print('我要搞', NAME) # 如果函數(shù)的內(nèi)容無global關(guān)鍵字, # - 有聲明局部變量 # NAME = ["產(chǎn)品經(jīng)理","廖波濕"] # def qupengfei(): # NAME = "自己" # print('我要搞', NAME) # qupengfei() # - 無聲明局部變量 # NAME = ["產(chǎn)品經(jīng)理","廖波濕"] # def qupengfei(): # NAME.append('XXOO') # print('我要搞', NAME) # qupengfei() # 如果函數(shù)的內(nèi)容有g(shù)lobal關(guān)鍵字 # - 有聲明局部變量 # NAME = ["產(chǎn)品經(jīng)理","廖波濕"] # def qupengfei(): # global NAME # NAME = "自己" # print('我要搞', NAME) # qupengfei() # 錯誤示例 # NAME = ["產(chǎn)品經(jīng)理","廖波濕"] # def qupengfei(): # NAME = "自己" # global NAME # print('我要搞', NAME) # qupengfei() # - 無聲明局部變量 # NAME = ["產(chǎn)品經(jīng)理","廖波濕"] # def qupengfei(): # global NAME # NAME = ["阿毛"] # NAME.append('XXOO') # print('我要搞', NAME) # qupengfei() ######## 全局變量變量名大寫 ######## 局部變量變量名小寫 # 優(yōu)先讀取局部變量,能讀取全局變量,無法對全局變量重新賦值 NAME=“fff”, # 但是對于可變類型,可以對內(nèi)部元素進行操作 # 如果函數(shù)中有g(shù)lobal關(guān)鍵字,變量本質(zhì)上就是全局的那個變量,可讀取可賦值 NAME=“fff” # qupengfei() # yangjian() NAME = ["產(chǎn)品經(jīng)理","廖波濕"] # def yangjian(): # # NAME = "史正文" # global NAME # 已經(jīng)聲明,NAME就是全局的的那個變量 # print('我要搞', NAME) # NAME = "小東北" # 修改 全局的變量 # print('我要搞', NAME) # def qupengfei(): # # NAME = "aS" # NAME.append('天扎龍') # print('我要搞', NAME) # # qupengfei() # NAME = ["產(chǎn)品經(jīng)理","廖波濕"] # def qupengfei(): # name = "自己" # global NAME # print('我要搞', NAME) # qupengfei() # NAME = '海風(fēng)' # # def huangwei(): # name = "黃偉" # print(name) # def liuyang(): # name = "劉洋" # print(name) # def nulige(): # name = '滬指花' # print(name) # print(name) # nulige() # liuyang() # print(name) # # huangwei() # name = "剛娘" # # def weihou(): # name = "陳卓" # def weiweihou(): # nonlocal name # nonlocal,指定上一級變量,如果沒有就繼續(xù)往上直到找到為止 # name = "冷靜" # # weiweihou() # print(name) # # print(name) # weihou() # print(name) # 剛娘 # 冷靜 # 剛娘
總結(jié)
以上所述是小編給大家介紹的python中的常量和變量代碼詳解,希望對大家有所幫助,如果大家有任何疑問請給我留言,小編會及時回復(fù)大家的。在此也非常感謝大家對腳本之家網(wǎng)站的支持!