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简单的功能错误?
原标题:python simple function error?

我有简单的数学操作功能。 如果我用进口的另一种文字来说明这一点,我就没有产出。 如果我删除<条码>f功能,所有东西都是工作罚款。 如何界定这一职能? 页: 1

def calci(a, op, b): 
    if op ==  + :
        c = a + b
    elif op ==  - :
        c = a-b
    elif op ==  * :
        c= a*b
    elif op == / :
        if(b == 0):
            print( can t divide ) 
            c = a/b
            print( value is ,c)
            return c 
result  = calci(12, + , 12)
print(result)
最佳回答

你们是否希望把结果退回到电话功能上,还是将其印刷? 通过你的节目,产生<代码>return<>/code>的唯一途径是分行,如果你这样做,你就永远不会达到<代码><>>。

如果你想这样做的话,你就应当推断:

print( value is ,c)
return c

页: 1 Don tabes去除你的测试代码(result = calci(......)等)。

原因是,一旦您的代码打上了<代码>return说明,该说明就是为了履行这一职能——其中没有任何其他内容将付诸执行(实际情况是,有一个称为的例外情况处理机制。 这是例外,但在此并非问题。

问题回答

您在职能结束时所作的推断似乎是错误的;return c只在=时发生,如果b = 0,则只重新指定至c。 目的应当是:

elif op == / :
    if(b == 0):
        print( can t divide ) # You should probably return here instead of falling through to the assignment

    c = a/b


print( value is ,c)
return c

只有在见面= / 时,你才行使职务。

从这两条线中删除两条表格,并打工。

i.e.

def calci(a, op, b): 

    ...

    print( value is ,c)
    return c

返回部分的缩减是不正确的,应当降低一级。 (这很难描述......一种 Python笑 s的law。)

这里是正确的法典:

def calci(a, op, b): 

    if op ==  + :
        c = a + b

    elif op ==  - :
        c = a-b

    elif op ==  * :
        c= a*b

    elif op == / :
        if(b == 0):
            print( can t divide )
            return 0

        c = a/b


    print( value is ,c)
    return c

result  = calci(12, + , 12)

print(result)




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