Question

下面是一个简单的银行账户，我使用Tkinter在Python中编码，问题是在撤销和存款函数中使用条件语句，代码总是与else语句一起使用，尽管在标准和兴趣函数中它应该更改TypeOfAccount的值。提供你的见解。

import tkinter
from tkinter import *
from random import randint

class BankAccount(object):
    def __init__(self, initial_balance=0):
        self.balance = initial_balance
    def deposit(self, amount):
        self.balance += amount
    def withdraw(self, amount):
        self.balance -= amount       
    def get_balance(self, initial_balance, rate):
        return self.get_balance() * self._rate

class BankAccountWithInterest(BankAccount):
  def __init__(self, initial_balance=0, rate=0.1):
     BankAccount.__init__(self, initial_balance)
     self._rate = rate           
  def interest(self):
     return self.balance * self._rate

balance = (randint(100, 500))
my_account = BankAccount(balance)
my_interest = BankAccountWithInterest(balance)
interest = my_interest.balance + my_interest.interest()
print(interest)

class GUI:
    def __init__(self, master):
        frame = Frame(master)
        frame.pack()

        #Toolbar#

        toolbar = Frame(root)
        toolbar.pack(side=TOP, fill=X)

        #Button#

        button1 = Button(toolbar, text="Deposit", width = 13, command=self.depositBalance)
        button2 = Button(toolbar, text="Withdraw",width = 13, command=self.depositWithdraw)
        button1.pack(side=LEFT)
        button2.pack(side=RIGHT)

        #Menu#

        subMenu = Menu(menu)
        menu.add_cascade(label="Type of Account", menu=subMenu)
        subMenu.add_command(label="Standard", command= self.standard)
        subMenu.add_command(label="Interest", command= self.interest)

        #Textbox#

        self.text = Entry(root)
        self.text.pack()

    def standard(self):
        typeOfAcc = "standard"
        w1.config(text=my_account.balance)
        w1.pack()

    def interest(self):
        typeOfAccount = "interest"
        w1.config(text=interest)
        w1.pack()

    def depositBalance(self): 
        if typeOfAccount == "interest":
            a = int(self.text.get())
            interest = interest + a
            w1.config(text=interest)
        elif typeOfAccount == "standard":
            a = int(self.text.get())
            my_account.balance = my_account.balance + a
            print(my_account.balance)
            w1.config(text=my_account.balance)
        else:
            w1.config(text="Error: Select account type")


    def depositWithdraw(self):
        if typeOfAccount == 1:
            a = int(self.text.get())
            interest = interest - a
            w1.config(text=interest)
        elif typeOfAccount == 0:
            a = int(self.text.get())
            my_account.balance = my_account.balance - a
            print(my_account.balance)
            w1.config(text=my_account.balance)
        else:
            w1.config(text="Error: Select account type")

typeOfAccount = 0
root = Tk()
menu = Menu(root)
root.config(menu=menu)
root.title("Bank Account")
root.minsize(width=250, height=100)
root.maxsize(width=300, height=150)

#Labels#
w = Label(root, text="Current Balance:")
w.pack()
w1 = Label(root, text="0")
w1.pack()

GUI(root)
root.mainloop()

Answer 1

部分问题在于，在您的deposit函数中，您正在检查typeOfAccount是'standard'还是'interest'，而在withdraw函数中，您正在检查typeOfAccount是1还是0。这种不一致将导致错误和意外行为。

我还强烈建议您放置这两个代码块：

balance = (randint(100, 500))
my_account = BankAccount(balance)
my_interest = BankAccountWithInterest(balance)
interest = my_interest.balance + my_interest.interest()
print(interest)

typeOfAccount = 0
root = Tk()
menu = Menu(root)
root.config(menu=menu)
root.title("Bank Account")
root.minsize(width=250, height=100)
root.maxsize(width=300, height=150)

#Labels#
w = Label(root, text="Current Balance:")
w.pack()
w1 = Label(root, text="0")
w1.pack()

在您的主GUI课程中。

class Account:
    def __init__(self, init_balance=0):
        self.balance = init_balance
    def deposit(self, amount):
        self.balance += amount
    def withdraw(self, amount):
        self.balance -= amount
    def get_balance(self, init_balance, rate):
        return self.get_balance() * self._rate

class InterestAccount(Account):
    def __init__(self, init_balance=0, rate=0.1):
        super().__init__(init_balance)
        self._rate = rate
    def interest(self):
        return self.balance * self._rate

class GUI(Tk):
    def __init__(self):
        Tk.__init__(self)
        self.title('Bank Account')

        #Menu#
        menu = Menu(self)
        acct_type_menu = Menu(menu)
        menu.add_cascade(label='Account Type', menu=acct_type_menu)
        acct_type_menu.add_command(label='Standard', command=self.set_type_standard)
        acct_type_menu.add_command(label='Interest', command=self.set_type_interest)
        self.config(menu=menu)

        #Account#
        start_balance = randint(100, 500)
        self.acct = Account(start_balance)
        self.my_interest = InterestAccount(start_balance)
        self.interest = self.my_interest.balance + self.my_interest.interest()

        #Labels#
        Label(self, text='Current Balance:').pack()
        self.balance_label = Label(self, text='Error: Select account type')
        self.balance_label.pack()

        #Button#
        btns_frame = Frame(self)
        btns_frame.pack(side=TOP, fill=X)

        Button(btns_frame, text='Deposit', width=13, command=self.deposit).pack(side=LEFT)
        Button(btns_frame, text='Withdraw', width=13, command=self.withdraw).pack(side=RIGHT)

        #Textbox#
        self.text = Entry(self)
        self.text.pack()

    def set_type_standard(self):
        self.acct_type = 'standard'
        self.balance_label.config(text=self.acct.balance)

    def set_type_interest(self):
        self.acct_type = 'interest'
        self.balance_label.config(text=self.interest)

    def clear_entry(self):
        self.text.delete(0, END)

    def deposit(self): 
        if self.acct_type == 'interest':
            a = int(self.text.get())
            interest = interest + a
            self.balance_label.config(text=self.interest)
        elif self.acct_type == 'standard':
            a = int(self.text.get())
            self.acct.balance += a
            self.balance_label.config(text=self.acct.balance)
        else:
            self.balance_label.config(text='Error: Select account type')
        self.clear_entry()

    def withdraw(self):
        if self.acct_type == 'interest':
            a = int(self.text.get())
            self.interest -= a
            self.balance_label.config(text=self.interest)
        elif self.acct_type == 'standard':
            a = int(self.text.get())
            self.acct.balance -= a
            self.balance_label.config(text=self.acct.balance)
        else:
            self.balance_label.config(text='Error: Select account type')
        self.clear_entry()

if __name__ == '__main__':
    GUI().mainloop()

主要变化：

使GUI继承自Tk
将更多代码移入GUI类
修改了主要deposit和withdraw方法以使用deposit类

withdraw

Account

将初始余额设为Error: Select account type

次要变更：

删除了什么都没做的代码
点击Deposit或Withdraw按钮时的明确输入
缩短了2个帐号类名称
使方法和变量名称更合适

编辑：由于您使用的Entry小部件用于存款和提款金额，因此您可能希望将Entry的输入限制为仅限数字和期限：

class GUI:
    def __init__(self):
        ...

        vcmd = (self.register(self.onValidate), '%S')
        self.text = Entry(self, validate='key', vcmd=vcmd)
        self.text.pack()

        ...

    def onValidate(self, S):
        if S in '0123456789.':
            return True
        return False

    ...

Tkinter银行账户中的条件语句错误

1 个答案:

主要变化：

次要变更：