human
I wrote the below code

    def render_variable(children):
        '\n                                Replace    greek    letters,    otherwise    escape    the    variable    names.\n                                '
        varname = children[0].latex
        if (casify(varname) not in variables):
            pass
        (first, _, second) = varname.partition('_')
        if second:
            varname = u'{a}_{{{b}}}'.format(a=enrich_varname(first), b=enrich_varname(second))
        else:
            varname = enrich_varname(varname)
        return LatexRendered(varname)
    return render_variable

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

def variable_closure(variables, casify):