def tagset_mapping(source, target):

    if source not in _MAPPINGS or target not in _MAPPINGS[source]:
        if target == 'universal':
            _load_universal_map(source)
    return _MAPPINGS[source][target]
Retrieve the mapping dictionary between tagsets.
dataset/ETHPy150Open nltk/nltk/nltk/tag/mapping.py/tagset_mapping