human
I wrote the below code

    def find_fold_class(codon, forward_table):
        base = set(['A', 'T', 'C', 'G'])
        fold = ''
        codon_base_lst = [i for i in codon]
        for (i, b) in enumerate(codon_base_lst):
            other_base = (base - set(b))
            aa = []
            for j in other_base:
                codon_base_lst[i] = j
                try:
                    aa.append(forward_table[''.join(codon_base_lst)])
                except KeyError:
                    aa.append('stop')
            if (aa.count(forward_table[codon]) == 0):
                fold += '0'
            elif (aa.count(forward_table[codon]) in (1, 2)):
                fold += '2'
            elif (aa.count(forward_table[codon]) == 3):
                fold += '4'
            else:
                raise RuntimeError('Unknown    Error,    cannot    assign    the    position    to    a    fold')
            codon_base_lst[i] = b
        return fold
    fold_table = {}
    for codon in codon_table.forward_table:
        if ('U' not in codon):
            fold_table[codon] = find_fold_class(codon, codon_table.forward_table)
    fold_table['---'] = '---'
    return fold_table

What's a good function header?

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

def _get_codon_fold(codon_table):