如何在python中更好地组织你的代码？

我一直想知道如何清理代码以使我的代码更容易和其他人查看我的代码时更具可读性。我对python相当陌生，所以我将所有内容都写入函数而不是使用类。我应该使用更多的类来更好地理解 python 吗？我知道如果代码有效，那么你的方式并不重要，但我只想学习如何减少我的代码行数。

def paymentData():
    calculateTotal = {}
    remainingAmount = []
    balance = int(raw_input('What is the balance of your bank account? \n'))
    amount = int(raw_input('What is the amount you would like to subtract? \n'))

    calculateTotal[balance]=amount

    total = balance - amount
    print('your total is: ' + str(total))

    remainingAmount.append(total)
    while True:
        choice = raw_input('To continue press "Enter" or type "q" to exit (For options type "o"). \n')
        if choice == '':
            clearScreen()
            paymentData()
            break
        elif choice.lower() == 'q':
            clearScreen()
            menuBudget()
            break
        elif choice.lower() == 'o':
            return calculateTotal, remainingAmount
            clearScreen()
            options_menu()
            break
        else:
            print('Invalid value.')
            continue

这是我的一个程序中的一个函数，它是一个预算程序，它采用balance用户输入的值并从该amount值中减去它。

此函数调用三个不同的函数，其中之一是clearScreen()清除终端：

def clearScreen(numlines=100):
    if os.name == "posix":
        os.system('clear')
    elif os.name in ("nt", "dos", "ce"):
        os.system('CLS')
    else:
        print('\n' * numlines)

options_menu()告诉您投入的所有金额的结果的功能（这还没有完成，我也不打算完成这个项目）。

def options_menu():
    print('Do you want to see all of you total amounts?\n(Enter 1 for Yes, 2 for no.)')
    choice = int(raw_input())
    if choice == 1:
        time.sleep(3)

    elif choice == 2:
        menuBudget()
    else:
        print('Invalid Response.')

and the `menuBudget()` function that is the main menu for this script:

def menuBudget():                                                               # this is a menu for budget fast.
    menuRunning = True
    while menuRunning:
        print("""
        1. payment calculator.
        2. Comming Soon.
        3. Comming Soon.
        4. Exit/Quit.
        """)
        ans = input('Pick on the options above.\n')
        if ans == 1:
            clearScreen()
            paymentData()
            break
        elif ans == 2:
            print('Comming soon!')
            continue
        elif ans == 3:
            print('Comming soon!')
            continue
        elif ans == 4:
            break
        else:
            print('Unknown Option Seleted!')
            continue