human
What is a the Python code you requested given the following:
Complete the below
@_replace_by('_tifffile.decode_lzw')
def decode_lzw(encoded):

    ''''Decompress LZW (Lempel-Ziv-Welch) encoded TIFF strip (byte string).
    The strip must begin with a CLEAR code and end with an EOI code.
    This is an implementation of the LZW decoding algorithm described in (1).
    It is not compatible with old style LZW compressed files like quad-lzw.tif.'
    '''
assistant
#Here is the Python code you requested.
    len_encoded = len(encoded)
    bitcount_max = (len_encoded * 8)
    unpack = struct.unpack
    if (sys.version[0] == '2'):
        newtable = [chr(i) for i in range(256)]
    else:
        newtable = [bytes([i]) for i in range(256)]
    newtable.extend((0, 0))
    def next_code():
        "Return    integer    of    'bitw'    bits    at    'bitcount'    position    in    encoded."
        start = (bitcount // 8)
        s = encoded[start:(start + 4)]
        try:
            code = unpack('>I', s)[0]
        except Exception:
            code = unpack('>I', (s + ('\x00' * (4 - len(s)))))[0]
        code <<= (bitcount % 8)
        code &= mask
        return (code >> shr)
    switchbitch = {255: (9, 23, int(((9 * '1') + ('0' * 23)), 2)), 511: (10, 22, int(((10 * '1') + ('0' * 22)), 2)), 1023: (11, 21, int(((11 * '1') + ('0' * 21)), 2)), 2047: (12, 20, int(((12 * '1') + ('0' * 20)), 2))}
    (bitw, shr, mask) = switchbitch[255]
    bitcount = 0
    if (len_encoded < 4):
        raise ValueError('strip    must    be    at    least    4    characters    long')
    if (next_code() != 256):
        raise ValueError('strip    must    begin    with    CLEAR    code')
    code = 0
    oldcode = 0
    result = []
    result_append = result.append
    while True:
        code = next_code()
        bitcount += bitw
        if ((code == 257) or (bitcount >= bitcount_max)):
            break
        if (code == 256):
            table = newtable[:]
            table_append = table.append
            lentable = 258
            (bitw, shr, mask) = switchbitch[255]
            code = next_code()
            bitcount += bitw
            if (code == 257):
                break
            result_append(table[code])
        else:
            if (code < lentable):
                decoded = table[code]
                newcode = (table[oldcode] + decoded[:1])
            else:
                newcode = table[oldcode]
                newcode += newcode[:1]
                decoded = newcode
            result_append(decoded)
    ...