错误：返回功能之外。不知道为什么

Question

我不确定我在这里做错了什么，有人可以帮忙吗？我正在尝试编写一个汇总数字列表的函数，并且还有一个用于测试它的测试函数。不幸的是，返回功能无法正常工作，我不确定为什么。

from cLibrary import test

def mysum(xs):
    """ Sum all the numbers in the list xs, and return the total. """
running_total = 0
for x in xs:
    running_total = running_total + x
return running_total

# Add tests like these to your test suite ...
test(mysum([1, 2, 3, 4]) == 10)
test(mysum([1.25, 2.5, 1.75]) == 5.5)
test(mysum([1, -2, 3]) == 2)
test(mysum([ ]) == 0)
test(mysum(range(11)) == 55) # 11 is not included in the list.

Answer 1

正如@Barmar所指出的，您需要适当地缩进它：

from cLibrary import test

def mysum(xs):
    """ Sum all the numbers in the list xs, and return the total. """
    running_total = 0
    for x in xs:
        running_total = running_total + x
    return running_total

# Add tests like these to your test suite ...
test(mysum([1, 2, 3, 4]) == 10)
test(mysum([1.25, 2.5, 1.75]) == 5.5)
test(mysum([1, -2, 3]) == 2)
test(mysum([ ]) == 0)
test(mysum(range(11)) == 55) # 11 is not included in the list.