Python“NameError：全局名称”nameCheck“未定义。”

Question

我是python的新手，并且一直在练习类和方法。当我运行包含以下代码的脚本时，出现错误“NameError：全局名称”nameCheck“未定义。”我该如何解决它？提前致谢。

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“没有定义”。

Answer 1

由于方法是在一个类中，你需要给那么自我属性：

做到这一点：

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是实例的占位符所以你必须创建一个实例通过这样做game = game()然后你可以调用任何方法

现在你可以从类的任何地方调用方法，如果你给变量的自我属性，他们也可以可以访问任何地方类

更多self

Answer 2

内一类，Python函数被调用的方法，并用这样的：

class game(object): 

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

    def nameCheck(self): 
     pass 

的self包含班级的目标。