我正在尝试制作一个程序(针对家庭作业问题),该程序使用不同的帐户,并允许您进行存款/提款。当Account.totalAllBalance提示时,我还应该显示所有帐户的余额。一切都很好,但是我试图找出如何将起始余额添加到我的totalAllBalance总计中。我不断收到此错误,我不确定为什么。我是编程新手,应该使用课堂上做的非常基本的编程。我的问题是为什么我会收到此错误以及如何解决?
错误在第20行,提示
在初始化中 Account.totalAllBalance = Account.totalAllBalance +数值 TypeError:+不支持的操作数类型:“方法”和“整数”
这是我到目前为止的尝试:
class Account:
totalAllBalance = 0
totalAccounts = 0
def __init__(self, name, startBalance):
self.name = name
self.startBalance = startBalance
num = startBalance
if self.startBalance < .01:
print("You may not start an account with that balance.")
else :
self.deposits = 0
self.withdraws = 0
Account.totalAccounts += 1
if Account.totalAccounts is 1:
Account.totalBalance = 0
else:
Account.totalAllBalance = Account.totalAllBalance + num
def deposit(self, num):
self.deposits += num
print(self.name, "has deposited", num, "dollars.")
Account.totalAllBalance = Account.totalAllBalance + num
return(self.totalBalance())
def withdraw(self, num):
self.withdraws += num
if num > self.startBalance + -1*(self.withdraws-num) + self.deposits:
print("You may not withdraw more than your balance.")
self.withdraws -= num
else:
num2= -1 * num
print(self.name, "has withdrawn", num,"dollars.")
return(self.totalBalance())
Account.totalAllBalance = Account.totalAllBalance + num2
def totalBalance(self):
if self.withdraws is None:
W = 0
if self.deposits is None:
D = 0
S = self.startBalance
W = self.withdraws * -1
D = self.deposits
num = S + W + D
print(self.name,"has", S + W + D , "dollars in their account.")
@classmethod
def totalAllBalance(cls):
print(cls.totalAllBalance)
@classmethod
def amtAccounts(cls):
print("There is", cls.totalAccounts, "account(s).")
答案 0 :(得分:0)
原因是因为您同时拥有totalAllBalance
作为类方法和类属性。除此之外,您访问Account.totalAllBalance
的方式使编译器解释是方法而不是属性。我建议改用self.totalAllBalance
,并为您的类方法使用其他名称(例如printTotalAllBalance
)
def deposit(self, num):
self.deposits += num
print(self.name, "has deposited", num, "dollars.")
self.totalAllBalance = self.totalAllBalance + num
return(self.totalBalance())
@classmethod
def printTotalAllBalance(cls):
print(cls.totalAllBalance)