Python「NameError：全局名稱」nameCheck「未定義。」

Question

我是python的新手，並且一直在練習類和方法。當我運行包含以下代碼的腳本時，出現錯誤「NameError：全局名稱」nameCheck「未定義。」我該如何解決它？提前致謝。

class game(object): 
    def play(): 
     name = input("What's your name, my friend? ") 
     check = nameCheck(name) 

     if check == 1: 
      print ("Hello %r " %(name)) 
     else: 
      print ("Sorry, I can't print your name because you don't have one!") 


    def nameCheck(name): 
     if name == "": 
      print("I can't believe you have no name!") 
      return 0 

     else: 
      print("%s is a nice name!" %name) 
      return 1 
game.play() 

蟒「NameError：全球名」 nameCheck「沒有定義」。

Answer 1

由於方法是在一個類中，你需要給那麼自我屬性：

做到這一點：

class game(object): 
    def play(self): 
     name = input("What's your name, my friend? ") 
     check = self.nameCheck(name) 

     if check == 1: 
      print ("Hello %r " %(name)) 
     else: 
      print ("Sorry, I can't print your name because you don't have one!") 


    def nameCheck(self, name): 
     if name == "": 
      print("I can't believe you have no name!") 
      return 0 

     else: 
      print("%s is a nice name!" %name) 
      return 1 
game = Game() 
game.play() 

的self是實例的佔位符所以你必須創建一個實例通過這樣做game = game()然後你可以調用任何方法

現在你可以從類的任何地方調用方法，如果你給變量的自我屬性，他們也可以可以訪問任何地方類

更多self

Answer 2

內一類，Python函數被調用的方法，並用這樣的：

class game(object): 

    def play(self): 
     self.nameCheck(name) 

    def nameCheck(self): 
     pass 

的self包含班級的目標。