human
I wrote the below code

    def replace_double_character(match):
        search = u'\u0398    \u03a7    \u03a8    \u03b8    \u03c7    \u03c8    \u039f\u03a5    \u0391\u03a5    \u0395\u03a5    \u039f\u03c5    \u0391\u03c5    \u0395\u03c5    \u03bf\u03c5    \u03b1\u03c5    \u03b5\u03c5'.split()
        replace = u'TH    CH    PS    th    ch    ps    OU    AU    EU    Ou    Au    Eu    ou    au    eu'.split()
        matched = match.group(0)
        if (matched in search):
            return replace[search.index(matched)]
        return matched
    search = u'\u0391\u0392\u0393\u0394\u0395\u0396\u0397\u0399\u039a\u039b\u039c\u039d\u039e\u039f\u03a0\u03a1\u03a3\u03a3\u03a4\u03a5\u03a6\u03a9\u03b1\u03b2\u03b3\u03b4\u03b5\u03b6\u03b7\u03b9\u03ba\u03bb\u03bc\u03bd\u03be\u03bf\u03c0\u03c1\u03c3\u03c2\u03c4\u03c5\u03c6\u03c9'
    replace = u'AVGDEZIIKLMNXOPRSSTUFOavgdeziiklmnxoprsstyfo'
    def replace_greek_character(match):
        matched = list(match.group(0))
        value = map((lambda l: replace[search.find(l)]), matched)
        return u''.join(value)
    return re.sub(u'[{0}]+'.format(search), replace_greek_character, re.sub(u'([\u0398\u03a7\u03a8\u03b8\u03c7\u03c8]+|\u039f\u03a5|\u0391\u03a5|\u0395\u03a5|\u039f\u03c5|\u0391\u03c5|\u0395\u03c5|\u03bf\u03c5|\u03b1\u03c5|\u03b5\u03c5)', replace_double_character, remove_accents(value)))

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

def latinize(value):