在Python中定義函數

Question

我有這樣的Python代碼，

def cube(n):
    n = n * n * n
    return n

    def by_three(n):
        if (n % 3 == 0):
         print "number is divisible by three"
         cube(n)
         return n
        else:
            print "number is not  divisible by three"
            return False

目前，我無法返回任何值，請讓我知道問題出在哪里？

Answer 1

您沒有在要返回的by_three函數中設置cube(n)的值。

def cube(n):
    result = n ** 3 # You can use ** for powers.
    return result

def by_three(n):
    if (n % 3 == 0):
        print "number is divisible by three"
        result = cube(n)
        return result
    else:
        print "number is not  divisible by three"
        return False

我還假設您在復制到SO時縮進了一個錯誤。 如果不是這種情況，那是您的原始縮進，那么您也需要糾正這一點。