human
I wrote the below code

    doclines = doc.splitlines()
    if ('Args:' in doclines):
        begin = doclines.index('Args:')
        if ('Returns:' in doclines[(begin + 1):]):
            end = doclines.index('Returns:', begin)
            args = doclines[(begin + 1):end]
        else:
            args = doclines[(begin + 1):]
        parameters = []
        pname = None
        desc = ''
        def add_param(pname, desc):
            if (pname is None):
                return
            if ('(required)' not in desc):
                pname = (pname + '=None')
            parameters.append(pname)
        for line in args:
            m = re.search('^\\s+([a-zA-Z0-9_]+):    (.*)', line)
            if (m is None):
                desc += line
                continue
            add_param(pname, desc)
            pname = m.group(1)
            desc = m.group(2)
        add_param(pname, desc)
        parameters = ',    '.join(parameters)
    else:
        parameters = ''
    return parameters

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

def method_params(doc):