human
I wrote the below code

    import bz2
    with open(__file__, 'rb') as f:
        arg = (f.read(3000) * 2)
    def compress(s):
        bz2.compress(s)
    return (compress, (arg,))

What's a good function header?
 ... Here's a good function header?
assistant
#Here's a good function header.

def task_compress_bz2():