³ò 3ÒÇIc@s*ddklZdefd„ƒYZdS(iÿÿÿÿ(tParserIt ChunkParserIcBseZdZd„ZRS(s6 A processing interface for identifying non-overlapping groups in unrestricted text. Typically, chunk parsers are used to find base syntactic constituants, such as base noun phrases. Unlike L{ParserI}, C{ChunkParserI} guarantees that the C{parse} method will always generate a parse. cCsdp td‚dS(só @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: C{list} of L{tuple} @rtype: L{Tree} is%ChunkParserI is an abstract interfaceN(tAssertionError(tselfttokens((s$/p/zhu/06/nlp/nltk/nltk/chunk/api.pytparses (t__name__t __module__t__doc__R(((s$/p/zhu/06/nlp/nltk/nltk/chunk/api.pyRsN(t nltk.parseRR(((s$/p/zhu/06/nlp/nltk/nltk/chunk/api.pys s