mò 0á¸Ec@sxdZdklZdefd„ƒYZdefd„ƒYZdefd„ƒYZdefd „ƒYZd „Zd S( snBatch class, for iterating over a sequence in batches $Id: Batch.py 40218 2005-11-18 14:39:19Z andreasjung $ (sBaset LazyPrevBatchcBstZd„ZRS(NcCs6t|i|i|i|i|id|i|iƒS(Ni(tBatchtparentt _sequencet_sizetfirsttoverlaptorphan(tselfR((t,/data/zmath/zope/lib/python/ZTUtils/Batch.pyt__of__s(t__name__t __module__R (((R Rst LazyNextBatchcBstZd„ZRS(NcCs[y|i|iWntj o dSnXt|i|i|i|id|i|iƒS(Ni( RRtendt IndexErrortNoneRRRR(RR((R R s (R R R (((R R stLazySequenceLengthcBstZd„ZRS(NcCst|iƒ|_}|S(N(tlenRRtsequence_lengthtl(RRR((R R "s(R R R (((R R!sRcBsVtZdZdZeƒZeƒZeƒZ ddddd„Z d„Z d„Z RS(sCreate a sequence batchiicCs´|d}t|||||ƒ\}}}||_||_||_ ||_||_||_||_ t |ddƒ|_ |i|i |_ |i djo d|_ndS(sÚEncapsulate "sequence" in batches of "size". Arguments: "start" and "end" are 0-based indexes into the sequence. If the next batch would contain no more than "orphan" elements, it is combined with the current batch. "overlap" is the number of elements shared by adjacent batches. If "size" is not specified, it is computed from "start" and "end". Failing that, it is 7. Attributes: Note that the "start" attribute, unlike the argument, is a 1-based index (I know, lame). "first" is the 0-based index. "length" is the actual number of elements in the batch. "sequence_length" is the length of the original, unbatched, sequence iiN(tstarttoptRtsizeRtsequencetszRRRRtmaxRtlengthRtprevious(RRRRRRRR((R t__init__.s !       cCsv|djo:||i|ijo t|‚n|i||iSn||ijo t|‚n|i||iS(Ni(tindexRRRRRR(RR((R t __getitem__Rs   cCs|iS(N(RR(R((R t__len__Zs( R R t__doc__t*__allow_access_to_unprotected_subobjects__RRR tnextRRRRR (((R R&s    $ cCs¾|djoC|djo,|djo||jo|d|}qPd}n|djožy||dWntj ot|ƒ}nX|djo||jo |}q÷q±||d}y|||Wq±tj ot|ƒ}q±Xn·|djo_y||dWntj ot|ƒ}nX|d|}|d|jo d}q±nKd}||d}y|||dWntj ot|ƒ}nX|||fS(Niii(RRRRRRR(RRRRR((R R]s@ '     N(R!tExtensionClasstBaseRR RRR(RR RR%RR((R t?s  7