³ò ˈóHc@sQdZddkZddkZddkZddklZddd„ƒYZdS(sD An interface class for U{SVM light} iÿÿÿÿN(tcalltSVMLightcBsheZdZdZdZed„Zd„ZeeƒZ d„Z d„Z d„Z d„Z d „ZRS( så An interface class for U{SVM light} This class currently supports classification of binary feature vectors with default options. It calls the SVMLight binaries via the shell. Future versions should add a SWIG interface and support for use of non-default SVMlight options and non-binary feature vectors. C{SVMLight} reads sparse binary feature vectors - ordered lists of numeric feature identifiers. t svm_learnt svm_classifycCsStii|tifƒ|_tii|tifƒ|_||_d|_ t |ƒt |ƒjot dƒ‚nt iƒ|_tii|idfƒ|_tii|idfƒ|_tii|idfƒ|_tii|idfƒ|_|i|i||ƒt|i|i|ifd|iƒ}|djpt‚dS( s^ Trains a new classifier. @type svm_path: C{str} @param svm_path: The filesystem path to the SVMLight binaries @type labels: C{tuple} @param labels: A tuple of C{1} or C{-1} training set labels. @type vectors: C{tuple} @param vectors: A tuple of sparse binary feature vectors. s/labels and vectors arrays are different lengthstexampletmodeltinputtoutputtstdoutiN(tostseptjoinRt learn_binaryt _svm_learntclassify_binaryt _svm_classifyt_cleanuptNonet_devnulltlent ValueErrorttempfiletmkdtempt _directoryt_example_fnamet _model_fnamet _input_fnamet _output_fnamet_write_vectorsRtdevnulltAssertionError(tselftsvm_pathtlabelstvectorstcleanuptret((s"/Users/NUS/csit/src_d2/svmlight.pyt__init__!s    cCsS|idjo<tidjotddƒ|_qLtddƒ|_n|iS(Ntposixs /dev/nulltwsNUL:(RRR tnametopen(R((s"/Users/NUS/csit/src_d2/svmlight.pyt _get_devnull?s cCs|iiƒ}d|d<|S(NR(t__dict__tcopyR(Rtstate((s"/Users/NUS/csit/src_d2/svmlight.pyt __getstate__Js cCs¢|i|ig}|D] }|dq~|ƒt|i|i|i|ifd|iƒ}|djpt‚|iƒ}t |ƒt |ƒjpt‚|S(sì Classify feature vectors. @type vectors: C{tuple} @param vectors: A tuple of sparse binary feature vectors. @rtype: C{tuple} @return: A tuple of C{float} vector classifications. t0Ri( RRRRRRRRt_read_classificationR(RR"t_[1]tvR$tresults((s"/Users/NUS/csit/src_d2/svmlight.pytclassifyOs 1  cCsÄt|dƒ}t|ƒt|ƒjpt‚x„tdt|ƒƒD]m}dtdtit||ƒƒƒ}|did„||Dƒƒ|}|id|||fƒqEW|i ƒdS(NR'it:gð?t cssx|]}t|ƒVqWdS(N(tstr(t.0ti((s"/Users/NUS/csit/src_d2/svmlight.pys is s%s %s ( R)RRtrangeR7tmathtsqrtR twritetclose(RtfnameR!R"tfileR9tvaltfstring((s"/Users/NUS/csit/src_d2/svmlight.pyR`s '%cCsjt|idƒ}g}x'|iƒD]}|it|ƒƒq%W|iƒt|ƒdjpt‚|S(Ntri(R)Rt readlinestappendtfloatR>RR(RR@tresulttline((s"/Users/NUS/csit/src_d2/svmlight.pyR0ms  cCsa|ioSx<ti|iƒD](}titii|i|fƒƒqWti|iƒndS(N(RR tlistdirRtunlinkR R trmdir(RR?((s"/Users/NUS/csit/src_d2/svmlight.pyt__del__ws  &(t__name__t __module__t__doc__R RtFalseR%R*tpropertyRR.R4RR0RL(((s"/Users/NUS/csit/src_d2/svmlight.pyRs      ((ROR RR;t subprocessRR(((s"/Users/NUS/csit/src_d2/svmlight.pyss