def len(obj):
    try:
        return _len(obj)
    except __HOLE__:
        try:
            # note: this is an internal undocumented API,
            # don't rely on it in your own programs
            return obj.__length_hint__()
        except AttributeError:
            raise TypeError
dataset/ETHPy150Open amrdraz/kodr/app/brython/www/src/Lib/test/test_iterlen.py/len