ķ ų`]c@s:ddlmZddlmZdefd„ƒYZdS(i˙˙˙˙(tParserI(t ChunkScoret ChunkParserIcBs eZdZd„Zd„ZRS(s; A processing interface for identifying non-overlapping groups in unrestricted text. Typically, chunk parsers are used to find base syntactic constituents, such as base noun phrases. Unlike ``ParserI``, ``ChunkParserI`` guarantees that the ``parse()`` method will always generate a parse. cCs tƒ‚dS(sŪ Return the best chunk structure for the given tokens and return a tree. :param tokens: The list of (word, tag) tokens to be chunked. :type tokens: list(tuple) :rtype: Tree N(tNotImplementedError(tselfttokens((s-lib/python2.7/site-packages/nltk/chunk/api.pytparses cCs=tƒ}x-|D]%}|j||j|jƒƒƒqW|S(sŒ Score the accuracy of the chunker against the gold standard. Remove the chunking the gold standard text, rechunk it using the chunker, and return a ``ChunkScore`` object reflecting the performance of this chunk peraser. :type gold: list(Tree) :param gold: The list of chunked sentences to score the chunker on. :rtype: ChunkScore (RtscoreRtleaves(Rtgoldt chunkscoretcorrect((s-lib/python2.7/site-packages/nltk/chunk/api.pytevaluate&s  #(t__name__t __module__t__doc__RR (((s-lib/python2.7/site-packages/nltk/chunk/api.pyRs N(t nltk.parseRtnltk.chunk.utilRR(((s-lib/python2.7/site-packages/nltk/chunk/api.pyt s