TypeError：intとfloatの両方

Question

class Account(object): 
    def __init__(self,holder, number, balance, credit_line = 1500): 
     self.holder = holder 
     self.number = number 
     self.balance = balance 
     self.credit_line = credit_line 

    def deposit(self, amount): 
     self.balance = amount 
    def withdraw(self, amount): 
     if(self.balance - amount < -self.credit_line): 
      return False 
     else: 
      self.balance -= amount 
      return True 

    def balance(self): 
     return self.balance 
    def holder(self): 
     return self.holder 

    def transfer(self, target, amount): 
     if(self.balance - amount < -self.credit_line): 
      #coverage insufficient 
      return False 
     else: 
      self.balance -= amount 
      target.balance += amount 
      return True 
Guido = Account("Guido", 10 ,1000.50) 
Guido.balance() 
------------------------------------------------------------------------- 


Traceback (most recent call last): 
    File "Account.py", line 31, in <module> 
    Guido.balance() 
TypeError: 'float' object is not callable 

Answer 1

__init__メソッドでは、メソッドbalanceをオーバーライドしています。フィールド名を_balanceに変更するか、balanceメソッドを削除してGuido.balanceを使用してください。

また...............すぐにありがとう

Answer 2

class Account(object): 
    def __init__(self,holder, number, balance, credit_line = 1500): 
     self.holder = holder 
     self.number = number 
     self.balance = balance 
     self.credit_line = credit_line 

    def deposit(self, amount): 
     self.balance = amount 
    def withdraw(self, amount): 
     if amount > self.balance: 
      print "Amount greater than available balance" 

     else: 
      self.balance -= amount 
      return True 

    def bala_nce(self): 
     return self.balance 
    def hold_er(self): 
     return self.holder 
    def num(self): 

     return self.number 


    def transfer(self, target, amount): 
     if(self.balance - amount < -self.credit_line): 
      #coverage insufficient 
      return False 
     else: 
      self.balance -= amount 
      target.balance += amount 
      return True 

guido = Account("Guido", 10 ,10000.100) 
guido.withdraw(2300.100) 

print "Account name: " ,guido.hold_er() 
print "available balance: $",guido.bala_nce() 

あなたは小文字（すなわちguido = Account(...)、ないGuido）で始まるあなたの変数に名前を付ける必要があることに注意その作業は