def startOfChunk()

in metrics/conlleval.py [0:0]

• 13 lines of code
• 23 McCabe index (conditional complexity)

def startOfChunk(prevTag, tag, prevType, type):
    """
    checks if a chunk started between the previous and current word;
    arguments:  previous and current chunk tags, previous and current types
    """
    chunkStart = ((prevTag == "B" and tag == "B") or
        (prevTag == "B" and tag == "B") or
        (prevTag == "I" and tag == "B") or
        (prevTag == "O" and tag == "B") or
        (prevTag == "O" and tag == "I") or

        (prevTag == "E" and tag == "E") or
        (prevTag == "E" and tag == "I") or
        (prevTag == "O" and tag == "E") or
        (prevTag == "O" and tag == "I") or

        (tag != "O" and tag != "." and prevType != type) or
        (tag == "]" or tag == "["))
        # corrected 1998-12-22: these chunks are assumed to have length 1

    #logging.info("startOfChunk?", prevTag, tag, prevType, type)
    #logging.info(chunkStart)
    return chunkStart