将我的生成器转换为生成器理解

Question

函数式编程忍者的问题.这是我的发电机:

def get_interesting_line(file,*searches):
    with open(file,'r') as f:
        for line in f:
            if all(search in line for search in searches):
                yield line

我怀疑这可能会变成一个生成器表达式.不过,当我尝试制作时,我的头往往会受伤.可能吗？

编辑:这是我的尝试,它没有工作(产生一个生成器对象):

def test(file, *searches):
    with open(file) as f:
        yield (line for line in f if all(search in line for search in searches))

lines = test('myfile')
next(lines)

Answer 1

你的代码不起作用,因为

yield (line for line in f if all(search in line for search in searches))

将您的函数转换为生成器,生成另一个生成器(由生成器表达式形成).

你需要的是yield from(Python 3.3+):

yield from (line for line in f if all(search in line for search in searches))