python：压缩条件或检查多个变量等于一个公共值

Question

说我想压缩下面这行代码：

if a == 10 or b == 10 or sum == 10 or diff == 10:
    # do something

有没有办法将所有这些 or 压缩为指向一个值？

类似于：

if (a or b or sum or diff) == 10:
    # do something

Answer 1

翻转过来

if 10 in {a, b, sum, diff} 应该有效

要泛化更多值，请使用：

if {val1, val2, val3} & {a, b, sum, diff}

Answer 2

if 10 in [a, b, sum, diff]:

但是请注意，这仅适用于单个公共值。如果您有两个值要与四个不同的变量进行比较，那么 "distributive law" 就不会那么容易实现。

Answer 3

它并没有短多少，但我会使用内置的 any():

any(val == x for val in (a, b, c))

你的情况：

if any(val == 10 for val in (a, b, sum, diff)):
    # do something

希望对您有所帮助！

python: condense conditional OR that check several variables equal to a common value