'int'对象在python中不可调用
我得到了这个,我期望它在打印x.withdraw()时能打印410。
Kyle 12345 500
Traceback (most recent call last):
File "bank.py", line 21, in <module>
print x.withdraw()
TypeError: 'int' object is not callable
这是我的代码:
class Bank:
def __init__(self, name, id, balance, withdraw):
self.name = name
self.id = id
self.balance = balance
self.withdraw = withdraw
def print_info(self):
return "%s %d %d" % (self.name, self.id, self.balance)
def withdraw(self):
if self.withdraw > self.balance:
return "ERROR: Not enough funds for this transfer"
elif self.withdraw < self.balance and self.withdraw >= 0:
self.balance = self.balace - self.withdraw
return self.balance
else:
return "Not a legitimate amount of funds"
x = Bank("Kyle", 12345, 500, 90)
print x.print_info()
print x.withdraw()
我是否需要在类本身中修复某些问题,或者我的方法调用有问题?
-
您在实例上设置具有相同名称的属性:
self.withdraw = withdraw
您正在尝试调用的是该属性,而不是方法。Python不会区分方法和属性,它们也不位于单独的命名空间中。
为属性使用其他名称;
withdrawn
(退出的过去时)作为更好的属性名称浮现在脑海:class Bank: def __init__(self, name, id, balance, withdrawn): self.name = name self.id = id self.balance = balance self.withdrawn = withdrawn def print_info(self): return "%s %d %d" % (self.name, self.id, self.balance) def withdraw(self): if self.withdrawn > self.balance: return "ERROR: Not enough funds for this transfer" elif self.withdrawn < self.balance and self.withdrawn >= 0: self.balance = self.balance - self.withdrawn return self.balance else: return "Not a legitimate amount of funds"
(我也纠正了一个错字;您曾
balace
在打算使用的位置使用过balance
)。