比较if语句中的多个值 [英] Compare to multiple values in an if statement

问题描述

我将需要多个if语句来与相同的几个元素进行比较，并且想知道是否有这些方法可以使代码更简洁，更容易.

im going to need multiple if statements comparing to the same couple elements, and was wondering if there was something along these lines i could do to make the code cleaner and easier.

示例将是该功能.

def test(num): 

    a = [1, 2, 3]

    if num == a : 
        return True

    else : 
        return False

会返回

>>>test(1)
True
>>>test(2)
True
>>>test(5)
False

不必为1，2和3编写单独的if语句.

Instead of having to write the separate if statements for 1, 2, and 3.

推荐答案

使用in运算符

if num in a : 

与

def test(num): 
    a = [1, 2, 3]
    if num in a : 
        return True
    else : 
        return False

可以解决(如Padraic所建议的那样)

a work around would be (as suggested by Padraic)

 def test(num): 
        a = [1, 2, 3]
        return num in a

之所以可行，是因为in运算符比较RHS中是否存在LHS并分别返回布尔值.

This would work because, The in operator compares if the LHS is present in the RHS and returns a boolean value respectively.

这也是可能的

test = lambda x:  num in [1, 2, 3]

这一切都在一行中！

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