filtering files using 'any()"

[perfringo]

There is also built-in mmap which can be used to search text inside file:

import mmap

with open('my_file') as f:
    mapping = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ)
    if mapping.find(b'latest') != -1:
        print("Found 'latest'")

It can be easily written as function and called on files needed.