B_Kc@scdZddkZddklZddkTddkTdd dYZdefdYZdS( s Read lines from the Prepositional Phrase Attachment Corpus. The PP Attachment Corpus contains several files having the format: sentence_id verb noun1 preposition noun2 attachment For example: 42960 gives authority to administration V 46742 gives inventors of microchip N The PP attachment is to the verb phrase (V) or noun phrase (N), i.e.: (VP gives (NP authority) (PP to administration)) (VP gives (NP inventors (PP of microchip))) The corpus contains the following files: training: training set devset: development test set, used for algorithm development. test: test set, used to report results bitstrings: word classes derived from Mutual Information Clustering for the Wall Street Journal. Ratnaparkhi, Adwait (1994). A Maximum Entropy Model for Prepositional Phrase Attachment. Proceedings of the ARPA Human Language Technology Conference. [http://www.cis.upenn.edu/~adwait/papers/hlt94.ps] The PP Attachment Corpus is distributed with NLTK with the permission of the author. iN(t deprecated(t*t PPAttachmentcBseZdZdZRS(cCs:||_||_||_||_||_||_dS(N(tsenttverbtnoun1tpreptnoun2t attachment(tselfRRRRRR((s1/p/zhu/06/nlp/nltk/nltk/corpus/reader/ppattach.pyt__init__1s      cCs,d|i|i|i|i|i|ifS(NsJPPAttachment(sent=%r, verb=%r, noun1=%r, prep=%r, noun2=%r, attachment=%r)(RRRRRR(R ((s1/p/zhu/06/nlp/nltk/nltk/corpus/reader/ppattach.pyt__repr__9s(t__name__t __module__R R (((s1/p/zhu/06/nlp/nltk/nltk/corpus/reader/ppattach.pyR0s tPPAttachmentCorpusReadercBsVeZdZdZdZedZdZdZe dddZ RS( s= sentence_id verb noun1 preposition noun2 attachment c CsItg}|i|tD]%\}}|t||id|q~S(Ntencoding(tconcattabspathstTruetStreamBackedCorpusViewt_read_obj_block(R tfileidst_[1]tfileidtenc((s1/p/zhu/06/nlp/nltk/nltk/corpus/reader/ppattach.pyt attachmentsCs c CsItg}|i|tD]%\}}|t||id|q~S(NR(RRRRt_read_tuple_block(R RRRR((s1/p/zhu/06/nlp/nltk/nltk/corpus/reader/ppattach.pyttuplesHs cCsk|djo |i}nt|to |g}ntg}|D]}||i|iqE~S(N(tNonet_fileidst isinstancet basestringRtopentread(R RRtf((s1/p/zhu/06/nlp/nltk/nltk/corpus/reader/ppattach.pytrawMscCs2|i}|ot|igSngSdS(N(treadlinettupletsplit(R tstreamtline((s1/p/zhu/06/nlp/nltk/nltk/corpus/reader/ppattach.pyRRs cCs2|i}|ot|igSngSdS(N(R$RR&(R R'R(((s1/p/zhu/06/nlp/nltk/nltk/corpus/reader/ppattach.pyRYs s2Use .tuples() or .raw() or .attachments() instead.R%cCsP|djo|i|Sn|djo|i|Sntd|dS(NR%R#s bad format %r(RR#t ValueError(R titemstformat((s1/p/zhu/06/nlp/nltk/nltk/corpus/reader/ppattach.pyR!as( R R t__doc__RRRR#RRRR!(((s1/p/zhu/06/nlp/nltk/nltk/corpus/reader/ppattach.pyR?s      (( R,tcodecstnltk.internalsRtutiltapiRt CorpusReaderR(((s1/p/zhu/06/nlp/nltk/nltk/corpus/reader/ppattach.pys's