def map_tag(source, target, source_tag):

    # we need a systematic approach to naming
    if target == 'universal':
        if source == 'wsj':
            source = 'en-ptb'
        if source == 'brown':
            source = 'en-brown'

    return tagset_mapping(source, target)[source_tag]
Maps the tag from the source tagset to the target tagset.
dataset/ETHPy150Open nltk/nltk/nltk/tag/mapping.py/map_tag