Question

我试图在课堂上为一个项目编写一个计算器，但一直遇到错误：

追踪（最近一次通话）：文件＆＃34; C：\ Users \ shane \ PythonPrograms \ louie.py＆＃34;，第56行，in tax_percent =（价格*税） TypeError：不能将序列乘以非int类型＆＃39; float＆＃39;

我的代码如下。任何人都可以帮我调试吗？

size_types = {'mini',
              'regular',
              'large'
}

meat_types = {'pork',
              'beef',
              'chicken'
}

def price_pork_meal(size):
    if size == 'mini':
        return 3.00
    if size == 'regurlar':
        return 4.00
    if size == 'large':
        return 6.00
    else:
        return (input('Please try again:'))
    return size

def price_beef_meal(size):
    if size == 'mini':
        return 4.00
    if size == 'regular':
        return 7.00
    if size == 'large':
        return 9.00
    else:
        return (input('Please try again:'))
    return size

def price_chicken_meal(size):
    if size == 'mini':
        return 3.50
    if size == 'regular':
        return 6.00
    if size == 'large':
        return 8.00
    else:
        return (input('Please try again:'))
    return size

def final_price(price, tax_percent):
    price = size
    total_price = price + tax_percent
    return total_price


size = (input('Please enter mini, regular, or large:\n'))

price = size

tax = 0.825

tax_percent = (price * tax)

print(final_price(price, tax_percent))

Answer 1

您的方法在python中无效。您不能将序列与浮点值相乘，如错误中所写。

这不会起作用：

a = (1,2,3)
b = a * 0.25

您可以使用支持此功能的numpy（以及更多功能）或自行实现：

a = (1,2,3)
b = list(map(lambda x: x*0.2, a))  # or many other approaches; outer list needed in python3 to make it a list instead of an generator-expression

不能将序列乘以非int类型＆＃39; float＆＃39 ;?

1 个答案: