python data analysis environments outside

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1、EnvironmentsOutsidethePythonEcosystemandCloudComputingOutsidethePythonecosystem,programminglanguagessuchasR,C,Java,andFortranarefairlypopular.Inthischapter,wewilldelveintotheparticularsofexchanginginformationwiththeseenvironments.CloudcomputingaimstodelivercomputingpowerasautilityovertheInternet.Th

2、ismeansthatwedon'tneedtohavealotofpowerfulhardwarelocally.Instead,wepayaswego—dependingonourcurrentneeds.WewillalsotalkabouthowtogetourPythoncodeintheCloud.Thisisarapidlyevolvingindustryinafast-pacedworld.Wehavemanyoptionsavailable,ofwhichwewillcoverGoogleAppEngineandPythonAnywhere.AmazonWebService

3、s(AWS)isdeliberatelynotdiscussedinthisbook,sinceotherbookssuchasBuildingMachineLearningSystemswithPython,WilliRichertandLuisPedroCoelho,PacktPublishing,mentionedinthePreface,coverthetopicingreatdetail.WeshouldalsobeawareoftheDataScienceToolboxathttp://datasciencetoolbox.org/.Thisisavirtualenvironme

4、ntfordataanalysisbasedonLinux,whichcanberunlocallyoronAWS.TheinstructionsgivenontheDataScienceToolboxwebsiteareveryclearandshouldhelpyousetupanenvironmentwithlotsofPythonpackagesthatwehavealreadyinstalled.Thetopicsthatwillbecoveredinthischapterareasfollows:•ExchanginginformationwithMATLAB/Octave•In

5、stallingrpy2•InterfacingwithREnvironmentsOutsidethePythonEcosystemandCloudComputing•SendingNumPyarraystoJava•IntegratingSWIGandNumPy•IntegratingBoostandPython•UsingFortrancodethroughf2py•SettingupGoogleAppEngine•RunningprogramsonPythonAnywhere•WorkingwithWakariExchanginginformationwithMATLAB/Octave

6、MATLABanditsopensourcealternativeOctavearepopularnumericalprogramsandprogramminglanguages.OctaveandMATLABhavesyntaxverysimilartoPython's.Infact,youcanfindwebsitesthatcomparetheirsyntax(forinstance,seehttp://wiki.scipy.org/NumPy_for_Matlab_Users).DownloadOctavefromhttp://www.gnu.org/software/octave/

7、download.html.ThemostrecentOctaveversionatthetimeofwritingwas3.8.0.Thescipy.io.savemat()functionsavesanarrayinafilecomplianttotheOctaveandMATLABformat.Thefunctionacceptsasparametersthenameofthefileandadicti