参考python中英文汇总programming for beginners intermediates

PythonPythonProgrammingforByAdamCopyright©2016byAdamAllrights.Nopartofthispublicationmaybereproduced,distributed,ortransmittedinanyformorbyanymeans,includingphotocopying,recording,orotherelectronicormechanicalmethods,withoutthepriorwrittenpermissionofthepublisher,exceptinthecaseofbriefquotationsembodiedincriticalreviewsandcertainother mercialusespermittedbycopyrightlaw.TableofChapter1:LearningAboutPythonTheOriginsofPythonWhyUseChapter2:TheBenefitsandNegativesofPythonTheBenefitsofPythonTheNegativesofChapter3:CommonTermsYouShouldKnowwithPythonChapter4:GettingStartedwithPythonTextEditorChapter5:LearningtheBasicsofPythonProgrammingChapter6:ABitMoreonCommentsChapter7:VariablesandWhatTheyDoinPython欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍Gettingstartedincodingcanbetough.Youmayhavelookedatafewofthemostpopularcodinglanguages,suchasC++orJavaandbeenabitscaredbywhatyousaw.Thepagesmayhavebeenfilledtothebrimwithlettersandsymbolsthatyoujustdidn’tunderstand,andyoubecamefrustratedandjustwantedtowalkaway.Manypeoplearescaredofprogramingandfeellikeitisjusttoohardforthem.ButwiththePythonprogramminglanguage,youwillfindthatitcanbeeasierthanevertolearnaboutcodingandtoevenreaditlikeaprofessional.ThisguidebookisgoingtogiveyousomeofthebasicsthatyouneedtogetstartedwithPythonprogramming.WewillstartoutabittalkingaboutwhatPythonprogrammingisaswellassomeofthestepsthatyoushouldtakeinordertodownloadtheprogram,ifitisn’talreadypresentonyourcomputer,andgiveyousomemoreinformationtoreallyunderstandwhythisprogramissogreat.Wewillthenmoveontosome thatwillbeusefultoyouwhenstartingoutwiththeprogramandeventalkaboutthebenefitsandthedrawbacksofusingPythonforallyourcodingandprogramingneeds.Therestoftheguidebookisdevotedtotalkingaboutsomeofthe欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍thingsthatyoucandowithinthePythonprogramaswellassomeexamplesofhoweachofthesewouldwork.Wetalkaboutaddingcommentsintothecode,workingwithstringsandintegers,andevenspendsometimeworkingwithvariablessothattheywillshowuprightintheprogram.Itisagreatideatoexperimentabitwiththeprocess.PythonmakesiteasytotestoutyourstringssothatyoucanfigureoutwhatisgoingtoworkandwhatneedssomemoreGettingstartedinprogramingcanseemlikeachallenge.Youmayworrythatyouaren’tgoingtobeabletofigureitalloutandallofthosecrazyprograminglanguagesmayhavescaredyouawayinthefirstplace.ThisguidebookisgoingtospendsometimelookingatthePythonlanguageandexploringhoweasyitcanbetogetstartedwiththissimpleprogram.欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍Chapter1:LearningAboutThecomputerworldhasbroughtinmanydifferenttypesofpeople.Someareinterestedinmakingmoneycreatingtheirownprogramstoselltoothers.Somejustliketomessaroundandlearndifferentthingsabouthowthecomputerwillwork.Andstillothershavedevotedtheirlivestoprogramming,makingittheproductthatbringshometheir eeachmonthwhethertheyworkatrepairingcomputers,workinacorporationtokeepthecomputerssafe,or someotheraspectofcomputertechnology.Whenitcomestocomputertechnology,nothingisgoingtobesimple.Beforeyoucanevengetaprogramtoworkonthecomputer,itneedstoreceivetherightcodetomakeitwork.ThereareseveraloptionsforcodecreationthatcomputertechcanchooseincludingJava,C++andPython.Herewe欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍exploreabitaboutPythonandwhyitisoftenpreferredovertheothertwoprogrammingoptions.BeforeyouareabletostartusingPythontotakeoveryourprogrammingneeds,itisimportanttostartlearningmoreaboutitandallofthegreatbenefitsyouwillreceivewhenusingthisprogram.Pythonisahighlevelprogrammingtool,whichmeansthatitiseasytouseandread,evenasabeginner.Thephilosophybehindthecodeisreadabilityandithasatypeofsyntaxthatallowstheprogrammertoexpresstheirconceptswithouthavingpagesofcodealongwithit.Comparedtousingotherpopularcodes,likeJavaandC++,thiscanmakePythonmucheasiertocomplete.Thephilosophyofthiscodelanguageissimpleenoughtouse.Itbelievesthatasimpledesignissomuchbetterthanacomplexoneandthatreadabilityisimportant.Thisisagreatlanguageforbeginnerstogetstartedonbecausetheywillactuallybeabletoreadandunderstandthecodetheyareputtingin.Withotheroptions,theymayhavetospendalotoftimetryingtogetthecodejustright,addinginmanyothersymbolstogetittowork.ButwithPython,itiskeptmuchsimplerandyoumayfindthatitiseasiertoreadthroughthelinesandseewhatyouare SomeofthefeaturesthatyoumaylikewithPython欢迎加入 Python编程学习交 ，群里免费提供500+本Python书籍Anelegantsyntaxwhichwillmaketheprogramssoeasytoread.Languagethatiseasytousesothattheprogramwillworkwithoutalotofbugs.Ifyouare ngadhocprogrammingtasksorprototypedevelopmentbecauseitworkswellwithoutissueswithmaintainingtheHasalargelibrarythatwillworkwithotherprogrammingtaskssuchaschangingfiles,searchingfortext,andconnectingwithwebservers.Pythonisreallyinteractive.Thismakesiteasierforyoutotestoutsmallbitsofcodetoseeiftheywork.YoucanalsobundleitwithadevelopmentenvironmentcalledIDLE.Ifyouwouldliketoexpandtheprogramminglanguage,itiseasytoextendintoothermoduleslikeCorC++.Windows,andMacOSX.Thesoftwareisfree.Youwon’thavetopayanythingtodownloadandusePythoninyourownlife.youcanalsomakemodificationsandredistributethisproduct.Itisunderalicense,butitisanopensourcelicensesoothersareabletouseit.EventhoughPythonisasimpleprogramminglanguage,itdoescontainsomeadvancedfeatureslikelistcomprehensionsandgenerators.Errorscanbecaughtquicklyinthisprogramming.Sincedatatypesdynamicallytyped,whenyoumixtypestogetherthatdon’tmatch,it欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍raiseanexceptionforyoutoYoucangroupthecodesintopackagesandmodulesifneeded.Thereisawidevarietyofbasicdatatypesthatyoucanchoosefromincludingdictionaries,lists,strings,andnumbers.TheOriginsofThebeginningofthemodernPythonprogrammingstartedinDecemberof1989.ThecreatorofthisprogramwasGuidovanRossumwhobeganprogrammingasmoreofahobby.Atthetime,vanRossumwasworkingonaprojectwiththeDutchCWIresearchinstitute,thatwaslaterterminated.VanRossumwasabletousesomeofthebasicsofthisnewlanguage,knownastheABClanguage,inordertoworkonPython.Themainstrengthofthislanguageisthatitisreallyeasytoextendupontomakemorecomplex,orkeepsimple,anditwasabletosupportmultipleplatforms.Bothofthesewereimportantduringthedayswhen computerswere ingpopular.AndsincePythonwasdesignedtocommunicatewithdifferentfileformatsandlibraries,itbecameahitaswell.Pythonhasgrownquiteabitsinceitsinceptionandmoretoolshave欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍easytouse,vanRossumhasbeenworkingoninitiativesthatencouragetheeducationofcodingtoeveryone,notjustaselectfew.UsingPythontousecodingcanmakethingseasierandhelpstogetridofsomeofthefearsassociatedwiththecomplexcomputercodessinceitdoesn’tlooksoscary.Overtheyears,vanRossumdecidedtomakePythonopensourced.ThisallowedalltogainaccessandmakechangestoPythonsothatifsomethinghappenedtovanRossum,allwouldnotbelost.ThankstohavingPythonopensourced,Python2.0wasreleasedduring2000tomakeitmorecommunityorientedandtohaveatransparentdevelopmentprocess.ThereareafewnewerversionsofPython2.0stillbeingused,butPython3hasbeentakingtheworldbystormandmostanticipatethiswillbethenormaloneusedwithinthenextfewyears.PythonThisversionofPythonwasreleasedin2008.Itisnotsimplyanupdatetotheprogram,butacompletechangeinit.Whiletherearealotofgreatfeaturesthatcomewiththisversion,itdoesn’thaveabackwardcompatibilitysoyouwillhavetomakeachoicebetweenPython2.0andPython3.Tomakethingseasier,theprogrammersdidmakealittlemarkerwithintheprogramthatwouldshowacoderwhatneededtobechangedbetweenthetwoprograms欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍uploading.Despitethis,mosthavestuckwithPython2.0forWhyUseAsyoucanprobablyguess,thereareseveraldifferentcomputercodingprogramsthatyoucanchoosetouse.Butwhiletherearesomebenefitstousingtheseotherprograms,Pythonisoneofthebestoptionsoutthere.Itiseasytouse,hasalotofoptionsforyoutochoosefrom,anditcanevenbeusedoveravarietyofplatformswithouthavingtochangethingsup.SomeofthebenefitsthatyouwilllovewithPythoninclude:PythonisdesignedtoworkwiththeEnglishlanguage,makingiteasytoread.Therearealsostrictrulesintermsofpunctuationontheprogramsoyouaren’tjustlookingatbracketsallovertheplace.Pythonalsomakessurethattheprogrammerknowshowtoformateverythingthankstoasetofrulesthatareinplace,makingiteasyforeveryonetocreateacodethatotherscanfollow.欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍Pythonhasbeenaroundforover25yearsnowandsinceitisoneoftheeasiestcodestolearnhowtouse,therehavebeenquiteafewdifferentcodeswrittenusingthesystem.Thegoodnewsisthatthissystemisopensourcedsothatthecodeisavailableforanyprogrammertouse.YoucaninstallthePythonprograminyourownsystemanduseitforyourown aluse.Whetheryouareusingthecodestofinishoffaproductortowritesomeofyourowncodes,thelibraryofPythoniseasytouse.Thecodesthatyouwantwillbeinstalledintothelibrariesandsincetheprogramhasbeenaroundforalongtie,theyaregoingtocoverprettymuchwhateveryouwantfromautomatingyourservertomakingchangestoapicture.SincePythonissopopular,thecommunityforPythonisprettybig.Thereareconferenceswithlotsofnetworkingandworkshopsavailableforthisprogrammingproductsandlotsofplacesyoucanvisit,bothonlineandoffline,toaskquestionsortolearnmoreabouttheprogram.YoumaywanttoconsidercheckingoutafewoftheseplacesifyouareabeginnerwithPythonasitcanhelpyoutolearnmoreandeventomeetsomenewpeople.Ifyouareinterestedingettingstartedwithcoding,Pythonisoneoftheoptionsthatyoucanmake.Itissimpletogetstartedonandsinceitwill欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍onavarietyofdifferentplatforms,itissuretoworkonyour computer.Sinceitiseasytoread,youwillfindthatcodingdoesn’thavetobeachallengeandyoucancreateyourown,orlearnfromothersinnotime.欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍Chapter2:TheBenefitsandNegativesofPythonisagreatprogramtousewhetheryouareabeginnerintheprogrammingworldoryouhavebeenintoitforsometime.ManyofthosewhoarejustlookingatgettingstartedwithprogrammingwilljumprightinwithPythonandmakeittheirown.Itissimpletounderstandandcanbeusedbyanyonewhoisreadytogetstartedwithcoding.Thischapterisgoingtotakesometimetoexplainsomeofthepositives,aswellassomeofthedrawbacks,ofusingPythonforyourprogramminglanguage.TheBenefitsofPythonisprobablyoneofthebestprogramminglanguagesthatyoucantouse.Beginnersaregoingtolovehoweasyitistoturnonthisprogram欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍startwritingtheirowncodes,evenwithoutexperience,andthereisplentytoenjoywhenyouareaprofessional,oranexpert,aswell.SomeofthebenefitsthatyouwillgetwhenyougetstartedwithPythoninclude:EasytouseandWhenitcomestoprogramminglanguage,therearenonethatareaseasytouseasPython.Otherlanguagesarekindofclunkyandhardtolookat.Youmaytakealookatthemandnoticethattheyhavetonsofbracketsandevenwordsthatyouwon’tevenrecognize.Itisenoughtoscareawaysomeonewhoisn’tusedtoprogrammingatalljustbecauseallthewordslookabitintimidating.Pythonisabitdifferent.Insteadofallthecrazybrackets,itmakesuseofindentations,causinganeasiertoreadpagethatisn’tsuchamess.Insteadofwordsthatyoucan’tunderstand,itusesEnglish.Theotherspecialcharactersarekepttoaminimumsothatyoucanlookatthepageofcodeandnotfeellikeyouaregoingtobeoverwhelmedintheprocess.Thisisoneoftheeasiestprogrammingtoolsthatyoucanuse.Itlooksnicethepageandwilluseplentyofwhitespaces,whenitcan,tomakeiteasier欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍readwhatyoushouldknow.Therearealsoplentyofplaceswithcommentssoyoucangetclarificationifaprogramistooconfusingforyou.Overall,itisoneofthebestprogramminglanguagestousetoreallygetaheadoreventolearnaboutprogramming.UsesEnglishasthemainSinceEnglishisthelanguagethatthisprogramisbasedoff,itisreallyeasytoread.Therearen’talotofwordsthatyouwon’tgetandyouwon’thavetospendtimetryingtofigureoutwhatitis lingyou.TheprogramisallinEnglishandyouwilllovehowsimplethiscanmakethings.AlreadypresentonsomeInsomecases,Pythonisalreadypresentonyourcomputer.MacOSXsystemsaswellasthosewithUbuntuwillalreadyhavePythonpreloaded.Youwillsimplyneedtodownloadatextinterpretertogetstarted.IntermsofusingPythononWindowscomputers,allyouneedtodoisdownloadtheprogram.Pythonworkswithalloftheseprograms,evenifitisn’tinstalledrightfromthe欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍CanworkwithotherprogrammingInthebeginning,youwillmostlikelyonlyusePythononitsown.Itisagreatprogramtolearnwithandgrowwith.Butovertime,youmaydecidethatyouwanttotrysomethingnewthatPythoncan’tdoonitsown.Luckily,Pythonisabletoworkwithseveralotherprogramminglanguages,suchasC++andJavaScript,soyoucanmessaround,learnsomemore,andreallygetthecodethatyouarelookingfor,evenifPythonisnotabletodoallthework.CantestoutthingswiththeWhenyoudownloadPython,youaregoingtohavetodownloadatextinterpretertoo.ThiswillmakeiteasierforPythontoreadthroughyourinformation.Youcanusesimpleproductsthataresometimesalreadyonyourcomputer,suchasNotepadfromWindowsorlookforanotherinterpreterthatmaybeabiteasier.Onceyoupickouttheinterpreterthatyouwouldliketouse,itistimetogettoworkwritingthecode.Someofthosewhoarenewtocodingmayfeelabouttryingtogetthecodetowork.ThisisanotherspotwherePython欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍makethingseasier.Itwillbeabletotakethewordsthatyouaretyandspitthembackout,withthehelpoftheinterpreter,injustafewseconds.Youcantestwhatyouare ngwhileyouareworkingonit!TherearesomanybenefitsofusingthePythonprogram.Beginnersaregoingtolovehowreadilyavailablethisprogramisandhoweasyitistolearnsomeofthesimplecommandsinnotime.Eventhosewhohavebeenprogrammingforsometimewillbeimpressedbyhowthisallworks!TheNegativesofWhiletherearealotofreasonstolovePython,itisimportanttorealizethatthereareafewnegativesthatyoushouldwatchoutfor.ThesenegativesItdoesn’thavealotofForthosewhoarelookingtoworkwithaprogramthathasalotofspeed,Pythonmaynotalwaysbethebestoptionforyou.Itisaninterpretedlanguagesothiswillslowitdowncomparedtosomeoftheotheroptionsthatarecompiledlanguages.However,itdoesdependonwhatyouare欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍Therearecertainben arkswiththePythoncodethatcanrunfasterusingPyPycomparedtoothercodes.LuckilythisissuewithaslowspeedandPythonisbeingremedied.ProgrammersareworkingtomaketheinterpretingspeedofPythonfastersothatyouwon’thavetocompareitwiththeotherssomuch.Overtime,thehopeisthatPythonwillbeabletoworkatthesamespeedasCandC++orevensomeofthenewerprogramminglanguagesthatarecomingout.NotpresentonmostmobilePythonisagreatoptiontouseifyouhavearegularcomputer.Itisavailableonmanydesktopandserverplatformstohelpyoucreatethecodethatyouarelookingfor.Butitisnotreadytogointomobilecomputing.Sincethereissuchabigincreaseinrevenueandpeoplegoingintothemobileindustry,itissadthatthisprogramminglanguagehasn’tkeptupwiththetrendslikeothers.PerhapsinthefuturePythonwilldecidetogointothefutureanddevelopaversionthatwillbeabletoworkwellwithvariousmobiledevices.Untilthen,programmerswillhavetobesatisfiedwithusingitontheirdesktopand欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍RestrictionswiththeIfyouarelookingtoworkwithaprogramthathasalotofdesignoptions,thePythonprogrammaynotbetherightoptionforyou.Thedesignlanguageisnotuptowhatyouwillfindwithsomeoftheotheroption.Sinceyouareworkingwithaprogramthatisdynamicallytyped,ittakesmoretestingandcanhavemoreerrorsthatwillonlyshowupwhenyouarerunningtheprogram.TheglobalinterpreterlockmeansthatyoucanonlyhaveonethreadaccesstheinternalsofPythonatatime.Thismaynotbeasimportantanymoresinceitiseasytospawnthetasksouttodifferentprocesses,butthedesignisnotasniceassomeoftheotheroptionsthatyouwouldlike.AgoodwaytoworkwiththedesignistorememberthatindentationisimportantwithPython.Otherprogramminglanguagesaregoingtousealotofbracketstoshowthedifferenceinlinesandinformationinsidetheprogram,butPythonisgoingtorelyonindentations.Makesuretobecarefulwithusingthistoavoidissuesanderrorsthatcancomeup.Pythoncanbeoneofthebestprogramsthatyouusetowriteyourown欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍andhavesomefun.Whiletherearealotofbenefitstousingthisprogram,especiallycomparedtosomeoftheotheronesthataren’taseasytoread,itisimportanttounderstandboththepositivesandnegativesofeachoptionbeforeyoujumpin!欢迎加入 Python编程学习交 ，群里免费提供500+本Python书籍Chapter3:CommonTermsYouShouldKnowwithBeforeyougettoofarintoyourprogrammingwithPython,itisimportanttounderstandsomeofthewordsthatcanmaketheprogrammingeasiertounderstand.ThischapterisgoingtotakesometimetolookatthedifferentwordsthatarecommoninPythonprogramming,andwhichwedotalkaboutabitinthisguidebook,tohelpavoidsomeconfusionandtohelpyougetstartedwithyourfirstcode.Class—thisisatemplatethatwasusedforcreatinguser-definedobjects.Docstring—thisisastringthatwillappearlexicallyfirstexpressioninsideamodule,function,orclassdefinition.Theobjectwillbeavailableto ationtools.Function—thisisablockofcodethatisinvokedwhenusingaprogram.Itisbestusedinordertoprovideacalculationor欢迎加入 Python编程学习交 ，群里免费提供500+本Python书籍autonomousThisisthebasicinterpreterandeditorenvironmentthatyoucanusealongwithPython.Itisgoodforthosewhoarejustbeginningwiththisandcanworkforthoseonabudget.Itisaclearexampleofcodeandwon’twastealotoftimeorspace.Immutable—thisisanobjectwithinthecodethatisassignedafixedvalue.Thiscouldincludetuples,strings,andnumbers.Youcan’taltertheobjectandyouwillneedtocreateanewobjectwithadifferentvalueandstoreitfirst.Thiscanbehelpfulinsomecases,suchasthekeysinaInteractive—onethingthatalotofbeginnerslikeaboutPythonisthatitissointeractive.Youcantryoutsomedifferentthingsintheinterpreterandseehowtheywillreactrightawayintheresults.Itisagoodwaytoimproveyourprogrammingskills,testoutanewideayouhaveandList—thisisadatatypewithinPythonthatisbuiltin.Itcontainsamutablesequenceofvaluesthataresorted.Itcanincludeimmutablevaluesofnumbersandstringsaswell.Mutable—thesearetheobjectsthatwillbeabletochangetheirvaluewithintheprogram,butwhichareabletokeeptheiroriginalid().Object—withinPython,thisisanydatawithastate,suchasavalueanattribute,aswellasadefinedbehavior,ora欢迎加入 Python编程学习交 ，群里免费提供500+本Python书籍Python3000—Python2andPython3arethemaintwotypesofPythonthatareavailable.ManypeoplehavestuckwithPython2sincePython3doesnothaveanybackwardscapabilitiesandtheylikeusingthedatabasesontheolderversion.Python3000isamythicaloptionofPythonthatdoesallowthisbackwardcapabilitysoyoucanuseitandthePython2.String—thisisoneofthemostbasictypesthatyouwillfindinPythonthatwillstorethetext.InPython2,thestringswillstoretextsothatthestringtypecanthenbeusedtoholdontobinarydata.Triplequotedstring—thisisastringthathasthreeinstancesofeitherthesinglequoteorthedoublequote.Itcouldhavesomethinglike‘’Ilovetacos’.Theyareusedformanyreasons.Theycanhelpyoutohavedoubleandsinglequotesinastringandtheymakeiteasiertogooverafewlinesofcodewithoutissues.Tuple—thisisadatatypethathasbeenbuiltintoPython.Thisdatatypeisanimmutableorderedsequenceofvalues.Thesequenceistheonlypartthatisimmutable.Itcancontainsomemutablevalues,suchashavingadictionaryinsideit,wherethevalue’scanchange.Type—thisisacategoryorsortofdatathatisrepresentedintheprogramminglanguages.Thesetypesaregoingtodifferintheirproperties,theyincludingimmutableandmutableoptions,aswellasintheirfunctionsandmethods.Pythonincludesafewoftheseincludingdictionarytypes,tuple,list,floatingpoint,long,integer,and欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍Chapter4:GettingStartedwithNowthatweknowsomeofthebenefitsofchoosingthisprogram,itistimetogetstartedwithit.Beforeyouareabletolearnsomeofthegreatstepsthatareneededtomakethisprogramcreatecodeforyou,itistimetosetuptheenvironment.ForthosewhohaveacomputerwithMacOSXorUbuntu,youwillalreadyhavePythoninstalledonthesystemThiscanmakethingseasiertogetstartedasyouwilljustneedtoclickontheicontogetstarted.WindowscomputerswillneedtoinstallPython.WhilePythonworksjustfineonWindowscomputers,itdoesn’tcomepreinstalledsoyouwillneedtodothis.ThefollowingstepsworkforWindows7to10:DownloadPython—youcanchoosebetweenPython2orPython3.Botharefantasticoptions;itjustdependsonwhichonewillgetthejobdonefor欢迎加入 Python编程学习交 ，群里免费提供500+本Python书籍ClicktorunthePythonInstaller.Whenyougettotheoptions,choosetoCustomizeInstallation.Youwillseeaboxpopup.ClickoneveryboxthatisunderOptionalFeaturesandthencontinue.Onthenextscreen,lookfortheAdvancedOptionsandthenchoosewhereyouwouldliketohavePythoninstall.Onceyouhavegottenthisfar,thenextpartistosetupyourPATHvariable.Thisisgoingtoallowtheusertoincludedirectoriesforallthecomponentsandpackagesthatareneeded.Todothisstep:OpenuptheControlPanelontheWindowscomputer.LookupEnvironment.UnderSystemEnvironmentVariable,clickonEdit.ThenclickonEnvironmentVariables.Youmayhavetolookabitforthenextpart,butlookforUserVariables.Youcantheneithercreateanewoneoreditanexistingpath.Tocreateanewpath,selectPATHasthenameandaddittothedirectoriesthatarethere.MakesurethateachVariableValuesisseparatedwithasemicolon.Ifyouwanttoedityourexistingpath,youneedtomakesureeachvalueisonadifferentline.ClickonNewandthenput欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍directoriesondifferentNowyoucanopenyourcommandprompt.TodothisclickonStartthenWindowsSystemandthenCommandPrompt.Whenthecommandpromptopens,youcantypein“Python.”ThiswillloadupthePythoninterpreter.YoucanthentypeinExitandhitEntertogetbacktothecommandprompt.YouwillnotbeabletoprogramPythonwithouthavingthetexteditorinplaceonyourcomputer.IfyouareusingWindows,theNotepadfunctionwillwork.MakesurethatyouarenotusingWordthough,itisnotconsideredaneditorandyourcodeisnotgoingtosaveonthesystemproperly.IfyouareconsideringgettingaversionofNotepad,youwillnoticethatNotepad++isthebestonetouseonaWindowscomputerandTextWrangleristhebesttouseforMac.Tosetthemup,dothefollowing:DownloadandtheninstallNotepadOnceitisdownloaded,openupthesettingsandclickon Tab

欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍TicktheboxthatisbesideExpandTabsMakesurethatthevalueisat4.ClickagaintoDownloadandtheninstallTextYouwon’tneedtoregistertoinstallthesoftware,justclickCancelifthereisaboxthatcomesupaskingforthis.Otherwise,followtheotherinstructionsthatcomeonthescreentosetthiseditorup.OncetheprogramisonyourcomputeritistimetolearnmoreaboutthecodingandfunctionsthatyoucanenjoyonPython.WhileyouaresettingupPython,makesurethatyoudownloadtheIDLEor欢迎加入非Python编程学习交 ，群里免费提供500+本Python书籍IntegratedDevelopmentandLearningEnvironment.ThisshoulddownloadalongwithPythonifyouaresettingitup,butmakesuretocheckintothiswhileyouaregoingthroughtheprocess.ThisistheenvironmentthatyouaregoingtoworkwithwhenyouareonPythonanditcanmakethingseasy.Ifyoudon’twanttomessaroundwithfindinganotherenvironmentoryouwanttomaketheprocessaseasyaspossibleforyouasabeginner,thisistheoptionforyou.Integrateddebuggerwithpersistentbreakpoints,callstackvisibility,andsteptomakethingseasierPython andcompletingthecode.Now,youcanchoosetouseanotherenvironment,likethosethatwediscussedaboveifneeded,butsincethisoneoftencomesasanoptionwithPythonanditisdesignedtoworkwellwiththissystem,therearemanypeoplewhochoosetogowiththisoption.Thatbeingsaid,therehavebeensomeissuesinthepastwithIDLEhavingtroublefocusing,won’tcopysomethings,andsomeclientsdon’tliketheinterfacedesign.Youmaywanttotryoutthisprogramaheadtimeandseeifitistherightoneforyouorifyouwouldliketouseoneoftheoptionsabove.GettingPythonsetuponyourcomputerisaprettyeasyprocess.Therearealreadyseveraltypesofcomputersthathavetheprogramminglanguagealreadypresentsoyouwon’thavetodoanyworkandtherestofthemsimplyneedaquickdownloadtocomplete.YoucanwaitjustashortamountoftimetogetPythononyourcomputerandthenyouaregoodtogoandtryoutsomeofthecodesyouwanttomake.Chapter5:LearningtheBasicsofPythonNowitistimetogettoknowabitmoreaboutPythonprogrammingandhowyoucanmakeitworkforyou.Youwillneedtolearnabitmoreaboutthe andthevariablesthatcomewithPythonsoyouareabletowritethewordsthatyouwantandmaketheprogramperforminacertainway.Let’stakealookatsomeofthesebasicsofPythonprogrammingsoyoucangetstartedwithyournewcoderightaway.Whenyouareworkingonanewcomputercodingprogram,youaregoingtonoticethateachcomputerlanguagewillhavecertain .Thesearethewordsthataremeantforaspecificcommandorpurposeinthelanguageandyoushouldtrytoavoidusingthemanywhereelse.Ifyoudousethesewordsinotherpartsofyourcode,youmayendupwithanerroralertortheprogramnotworkingproperly.The thatare forPythoninclude:IdentifierWhenyouarecreatinganewprograminPython,youaregoingtoworkoncreatingquiteafewentities,acombinationoffunctions,classes,andvariables.Allothesewillbegivenanamethatisalsoknownasanidentifier.ThereareafewrulesthatyouneedtofollowwhenforminganidentifierinPythonItshouldcontainletters,eitheruppercaseorlowercaseoraofthetwo,numbers,andtheunderscore.YoushouldnotseeanyspacesTheidentifiercan’tstartwithaTheidentifiercan’tbeakeywordanditshouldn’tincludeoneoftheIfyoubreakoneoftheserules,theprogramwillcloseonyouandwillshowasyntaxerror.Inaddition,youneedtoworkonmakingidentifi