Python -> Lua serialization

gistfile1.py

SPECIAL_DELIM = [("[{}[".format("="*n), "]{}]".format("="*n)) for n in range(10)]

def type_of(v, *types):
    return any(isinstance(v, t) for t in types)

def get_delim(s):
    if '"' not in s: and "\n" not in s:
        return ('"', '"')
    for op, cl in SPECIAL_DELIM:
        if op not in s and cl not in s:
            return (op, cl)
    raise ValueError("could not find delimiter for string")

def indent(s, level, prefix="  "):
    return "\n".join("{}{}".format(prefix*level, l).rstrip()
                     for l in s.split("\n"))

def to_lua(v):
    if type_of(v, str):
        od, cd = get_delim(v)
        temp = "{}{}{}".format(od, v, cd)
    elif type_of(v, float, int):
        temp = "{}".format(v)
    elif type_of(v, dict):
        kvs = []
        for k, v in v.iteritems():
            ks = "{}".format(to_lua(k))
            if ks.startswith("["):
                ks = "[ {} ]".format(ks)
            else:
                ks = "[{}]".format(ks)
            vs = to_lua(v)
            kvs.append("{} = {}".format(ks, vs))
        temp = "{{\n{}\n}}".format(indent(",\n".join(kvs), 1))
    elif type_of(v, list, tuple, set):
        kvs = []
        for i, v in enumerate(v):
            ks = "[{}]".format(i+1)
            vs = to_lua(v)
            kvs.append("{} = {}".format(ks, vs))
        temp = "{{\n{}\n}}".format(indent(",\n".join(kvs), 1))
    else:
        temp = to_lua(str(v))

    return temp

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