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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _bit_list_to_bytes(bit_list):
 """Converts an iterable of 1s and 0s to bytes. Combines the list 8 at a time, treating each group of 8 bits as a single byte. Args: bit_list (Sequence):
 Sequence of 1s and 0s. Returns: bytes: The decoded bytes. """

    num_bits = len(bit_list)
    byte_vals = bytearray()
    for start in six.moves.xrange(0, num_bits, 8):
        curr_bits = bit_list[start:start + 8]
        char_val = sum(
            val * digit for val, digit in six.moves.zip(_POW2, curr_bits))
        byte_vals.append(char_val)
    return bytes(byte_vals)