human
I wrote the below code

    if (profile is None):
        profile = snapshot_profile()
    def seq():
        for (_, ops, count) in common_pairs(profile):
            (yield ('%s:    %s\n' % (count, ops)))
    return ''.join(seq())

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

def render_common_pairs(profile=None):