human
Here's a good function header given the following:
I wrote the below code

    def decorate(f):
        'Store    f    in    HANDLERS[vcs][method].'
        if (vcs not in HANDLERS):
            HANDLERS[vcs] = {}
        HANDLERS[vcs][method] = f
        return f
    return decorate

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

def register_vcs_handler(vcs, method):