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python - 使用用户输入在python中循环和求和

问题描述

我试图通过要求用户输入他们想要预算的金额并将其分解为特定金额并在每次迭代中从原始金额中减去该金额并向他们展示最后的结果来计算预算

budget = int(input("Please enter the amount you have budgeted for this month: "))

print(budget)

expensess = ['Rent','Food','Car','Gym','Phone','Travel','Savings']


balance=0
budget = budget
for i in expensess:

    added_balance = int(input('How much did you budget for '+str(i)))
    new_balance = int(budget - added_balance)
    print(new_balance)
    balance += new_balance
    budget = balance
    print("budget is "+str(budget))
    

if balance is > budget:
    print("You underbudgeted ")
else:
    print('Good Job you would have extra money to spend'+ )

当我运行这个

Python 3.9.1 (tags/v3.9.1:1e5d33e, Dec  7 2020, 17:08:21) [MSC v.1927 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license()" for more information.
>>> 
=== RESTART: C:\Users\boxfo\Desktop\Programming Challenges\Budget Analysis.py ==
Please enter the amount you have bugeted for this month: 6000
6000
How much did you budget for Rent2000
budget is 4000
How much did you budget for Food2000
budget is 6000
How much did you budget for Car3000
budget is 9000
How much did you budget for Gym

标签： pythonpython-3.xloops

解决方案

你应该减少预算变量，你可以计算你想要的所有问题：

budget -= balance

我已经从您的代码中编写了一个带有一些注释的工作版本。

代码：

budget = int(input("Please enter the amount you have budgeted for this month: "))

expensess = ["Rent", "Food", "Car"]

for i in expensess:
    added_balance = int(input("How much did you budget for {}: ".format(i)))
    budget -= added_balance  # decrease the budget variable with the spend money
    print("Current budget is {}".format(budget))

if 0 > budget:  # If the budget is a minus number then you are underbudgeted.
    print("You underbudgeted: {}".format(abs(budget)))  # Creating ABS from negative number and print the difference.
else:
    print("Good Job you would have extra money to spend: {}".format(budget))

测试：

预算不足：

>>> python3 test.py
Please enter the amount you have budgeted for this month: 6000
How much did you budget for Rent: 2000
Current budget is 4000
How much did you budget for Food: 2000
Current budget is 2000
How much did you budget for Car: 3000
Current budget is -1000
You underbudgeted: 1000

好工作：

>>> python3 test.py
Please enter the amount you have budgeted for this month: 6000
How much did you budget for Rent: 2000
Current budget is 4000
How much did you budget for Food: 1000
Current budget is 3000
How much did you budget for Car: 1000
Current budget is 2000
Good Job you would have extra money to spend: 2000

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