'int'對象是不可調用的錯誤python

Question

嘿傢伙，所以我得到這個「TypeError：'int'對象不可調用」錯誤當我運行此代碼時，我做了一些研究，我認爲這是與我的變量命名？有人可以向我解釋什麼是錯的？

class account(object): 
    def set(self, bal): 
     self.balance = bal 
    def balance(self): 
     return balance 

這是我的例子來看：

>>> a = account() 
>>> a.set(50) 
>>> a.balance() 
Traceback (most recent call last): 
    File "<pyshell#12>", line 1, in <module> 
    a.balance() 
TypeError: 'int' object is not callable 

Answer 1

你掩蓋你的方法balance用實例屬性balance。重命名一個或另一個。在實例王牌

def set(self, bal): 
    self._balance = bal 

def balance(self): 
    return self._balance 

這些屬性的類（除了數據描述符，認爲property S）：你可以通過未決的預將其與例如下劃線命名實例屬性。從Class definitions documentation：

Variables defined in the class definition are class attributes; they are shared by instances. Instance attributes can be set in a method with self.name = value . Both class and instance attributes are accessible through the notation 「 self.name 」, and an instance attribute hides a class attribute with the same name when accessed in this way.