[Python.Cookbook(3rd,2013.5)].David.Beazley.文字版

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1、THIRDEDITIONPythonCookbookDavidBeazleyandBrianK.JonesPythonCookbook,ThirdEditionbyDavidBeazleyandBrianK.JonesCopyright©2013DavidBeazleyandBrianJones.Allrightsreserved.PrintedintheUnitedStatesofAmerica.PublishedbyO’ReillyMedia,Inc.,1005GravensteinHighwayNorth,Sebastopol,CA95472.O’Reillybooksmayb

2、epurchasedforeducational,business,orsalespromotionaluse.Onlineeditionsarealsoavailableformosttitles(http://my.safaribooksonline.com).Formoreinformation,contactourcorporate/institutionalsalesdepartment:800-998-9938orcorporate@oreilly.com.Editors:MeghanBlanchetteandRachelRoumeliotisIndexer:WordCo

3、IndexingServicesProductionEditor:KristenBorgCoverDesigner:KarenMontgomeryCopyeditor:JasmineKwitynInteriorDesigner:DavidFutatoProofreader:BIMProofreadingServicesIllustrator:RobertRomanoMay2013:ThirdEditionRevisionHistoryfortheThirdEdition:2013-05-08:FirstreleaseSeehttp://oreilly.com/catalog/erra

4、ta.csp?isbn=9781449340377forreleasedetails.NutshellHandbook,theNutshellHandbooklogo,andtheO’ReillylogoareregisteredtrademarksofO’ReillyMedia,Inc.PythonCookbook,theimageofaspringhaas,andrelatedtradedressaretrademarksofO’ReillyMedia,Inc.Manyofthedesignationsusedbymanufacturersandsellerstodistingu

5、ishtheirproductsareclaimedastrademarks.Wherethosedesignationsappearinthisbook,andO’ReillyMedia,Inc.,wasawareofatrade‐markclaim,thedesignationshavebeenprintedincapsorinitialcaps.Whileeveryprecautionhasbeentakeninthepreparationofthisbook,thepublisherandauthorsassumenoresponsibilityforerrorsoromis

6、sions,orfordamagesresultingfromtheuseoftheinformationcontainedherein.ISBN:978-1-449-34037-7[LSI]TableofContentsPreface.......................................................................xi1.DataStructuresandAlgorithms...............................................11.1.UnpackingaSequenceintoS

7、eparateVariables11.2.UnpackingElementsfromIterablesofArbitraryLength31.3.KeepingtheLastNItems51.4.FindingtheLargestorSmallestNItems71.5.ImplementingaPriorityQueue81.6.MappingKeystoMultipleValuesinaDictionary111.7.KeepingDictionari