def has_key(key):
:return: a corpus view that acts as a list of all noun lemmas
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/zope/zope/interface/common/mapping.py/IExtendedReadMapping.has_key--crossover with--dataset/ETHPy150Open nltk/nltk/nltk/corpus/reader/nombank.py/NombankCorpusReader.nouns