Python代码中total_costs自定义函数无法正常运行求助

• 变量作用域不匹配：你在get_input()函数内部定义的e1~e5都是局部变量，仅在get_input()函数的执行生命周期内有效，total_costs()函数没有权限直接访问另一个函数内部的局部变量，执行求和操作时会直接报变量未定义错误。
• 函数调用逻辑错误：你全程没有主动调用过total_costs()函数，哪怕作用域规则允许，get_input()里用到的monthly和yearly变量也不存在，执行get_input()时同样会触发变量未定义报错。

采用参数传值的规范写法，将采集到的支出数据传入计算函数：

def get_input():
    e1 = float(input("What is the monthly expense for House Payment. "))
    e2 = float(input("What is the monthly expense for Homeowners Insurance. "))
    e3 = float(input("What is the monthly expense for Car Payments. "))
    e4 = float(input("What is the monthly expense for Car Insurance. "))
    e5 = float(input("What is the monthly expense for Utilities. "))
    # 调用计算函数传入参数，接收返回的计算结果
    monthly, yearly = total_costs(e1, e2, e3, e4, e5)
    print("The monthly expenses total to",format(monthly, ',.2f'))
    print("The yearly expenses total to",format(yearly, ',.2f'))
    

def total_costs(e1, e2, e3, e4, e5):
    monthly = e1 + e2 + e3 + e4 + e5
    yearly = monthly * 12
    return monthly, yearly
    
    
get_input()

内容的提问来源于stack exchange，提问作者LastCheck