Python相当于LINQ All函数？

What is the idiomatic Python way to test if all elements in a collection satisfy a condition? (The .NET All() method fills this niche nicely in C#.)

什么是惯用的Python方法来测试集合中的所有元素是否满足条件？（.NET All（）方法在C＃中很好地填补了这个空白。）

There's the obvious loop method:

有明显的循环方法：

all_match = True
for x in stuff:
    if not test(x):
        all_match = False
        break

And a list comprehension could do the trick, but seems wasteful:

列表理解可以做到这一点，但似乎很浪费：

all_match = len([ False for x in stuff if not test(x) ]) > 0

There's got to be something more elegant... What am I missing?

必须有更优雅的东西......我错过了什么？

1 个解决方案

#1

all_match = all(test(x) for x in stuff)

This short-circuits and doesn't require stuff to be a list -- anything iterable will work -- so has several nice features.

这种短路并不需要填充列表 - 任何可迭代的东西都可以工作 - 所以有几个不错的功能。

There's also the analogous

还有类似的

any_match = any(test(x) for x in stuff)

#1

all_match = all(test(x) for x in stuff)