How to Sort a Dictionary by Value in Python | Career Karma

To sort a dictionary by value in Python you can use the sorted() function. Python's sorted() function can be used to sort dictionaries by ... 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HowtoChooseaCodingBootcamp BestOnlineCodingBootcampsandCourses BestFreeBootcampsandCodingTraining CodingBootcampvs.CommunityCollege CodingBootcampvs.Self-Learning Bootcampsvs.Certifications:Compared ReadStoriesfromStudents PayingforaBootcamp HowtoPayforCodingBootcamp UltimateGuidetoCodingBootcampLoans BestCodingBootcampScholarshipsandGrants EducationStipendsforCodingBootcamps GetYourCodingBootcampSponsoredbyYourEmployer GIBillandCodingBootcamps OtherTopicsinTech TechIntevriews CareerAdvice Python HTML CSS JavaScript Git Java C++ Startmyjourney Community CareerGuides Schools&Applications PrepCourses&Scholarships Resources LiveEvents Stories About Company Jobs Values Publication Press ReskillAmerica PartnerWithUs ResourceCenterPythonHowtoSortaDictionarybyValueinPython Facebook Twitter LinkedIn TosortadictionarybyvalueinPythonyoucanusethesorted()function.Python’ssorted()functioncanbeusedtosortdictionariesbykey,whichallowsforacustomsortingmethod.sorted()takesthreearguments:object,key,andreverse. Dictionariesareunordereddatastructures.Theyuseamappingstructuretostoredata.Dictionariesmapkeystovalues,creatingpairsthatholdrelateddata. UsingthePythonsorted()method,youcansortthecontentsofadictionarybyvalue.Forinstance,torankthepopularityofitemsonacoffeemenu,orlistthoseitemsinalphabeticalorder,youcanusePython’ssorted()method.Thistutorialwilldiscusshowthesorted()methodworksandhowyoucanuseittosortthecontentsofadictionary.  Pythonsorted()Refresher Python’sbuilt-insorted()functioncanbeusedtosortiterableobjectsbyakey,suchaslists,tuples,anddictionaries.Thesorted()functionsortstheitemsofthespecifiediterableobjectandcreatesanewobjectwiththenewlysortedvalues. Here’sthesyntaxforthesorted()method: sorted(object,key,reverse) Themethodtakesinthreeparameters: object:theiterableobjectthatyouwanttosort(required)key:thefunctionthatallowsyoutoperformcustomsortoperations(optional)reverse:specifieswhethertheobjectshouldbesortedindescendingorder(optional) Asyoucansee,“object”istheonlyrequiredparameter.Ifyoudecidenottousetheoptional“key”and“reverse”parameters,Pythonwillautomaticallysorttheobjectinascendingorder. 81%ofparticipantsstatedtheyfeltmoreconfidentabouttheirtechjobprospectsafterattendingabootcamp.Getmatchedtoabootcamptoday. FindYourBootcampMatch Theaveragebootcampgradspentlessthansixmonthsincareertransition,fromstartingabootcamptofindingtheirfirstjob. Startyourcareerswitchtoday Note:CareerKarmawroteafullguideonthesort()andsorted()methodsinPython.Ifyou’relookingtolearnmoreaboutthismethodandthekeyparameter,checkoutourPythonsort()tutorial. Let’swalkthroughaquickexampletoillustratehowthesorted()methodworks.  »MORE: Node.jsvsPython:DifferencesandSimilaritiesSaythatweareoperatingacoffeeshopandwewanttoretrieveanalphabeticallistofourCoffeeClub(loyalty)customers.Wealreadyhavealistofcustomers,butitisorderedbysign-update.Wecouldusethefollowingcodetosortourlist: customers=['KaleyFernandez','DariusRowland','IsaacBorthwick','AlexandriaKidd'] sorted_customers=sorted(customers) print(sorted_customers) Ourcodesortsthecustomersarrayandreturnsthefollowing: ['AlexandriaKidd','DariusRowland','IsaacBorthwick','KaleyFernandez'] Onthefirstlineofourcode,wedeclarealistthatstoresourcustomers’names;thislistiscalled:customers.Then,weusethesorted()methodtosortthelistofcustomernamesinascendingorder;thisnewlistiscalled:sorted_customers.Finally,weprintoutthenewlysortedlisttotheconsoleusingtheprint()function. SortaDictionarybyValue Let’ssaythatyouhaveadictionaryandyouwanttosortitbykey-valuepairs.Youcandothisbyusingtwofunctionstogether:items()andsorted().  FindYourBootcampMatch CareerKarmamatchesyouwithtoptechbootcamps Accessexclusivescholarshipsandprepcourses Selectyourinterest SoftwareEngineering Design DataScience DataAnalytics Sales UXDesign CyberSecurity DigitalMarketing Firstname Lastname Email Phonenumber BycontinuingyouagreetoourTermsofServiceandPrivacyPolicy,andyouconsenttoreceiveoffersandopportunitiesfromCareerKarmabytelephone,textmessage,andemail. Theitems()functionallowsyoutoretrievetheitemsinadictionary.Wecanusethisfunctionincombinationwiththesorted()functionandacustomkeyparametertosortadictionarybyvalue.Considerthefollowingtwoexamples. Example1:SortinDescendingOrder Let’sreturntothecoffeeshop.Supposewehaveadictionarythatstorestheitemsonourcoffeemenuaswellashowmanyofeachitemwereorderedinthelastmonth.Wewanttoseewhatthemostpopularcoffeewaslastmonth,sowedecidetosorttheorderdictionaryindescendingorderofvalues. Here’saprogramwecouldusetosortthecontentsofourdictionarybyvalue: orders={ 'cappuccino':54, 'latte':56, 'espresso':72, 'americano':48, 'cortado':41 } sort_orders=sorted(orders.items(),key=lambdax:x[1],reverse=True) foriinsort_orders: print(i[0],i[1]) Ourcodereturnsthefollowing: »MORE: PythonModuleNotFoundErrorSolutionespresso72 latte56 cappuccino54 americano48 cortado41 There’salotgoingoninourcode,solet’sbreakitdown.  Atthestartofourcode,wedefineadictionarycalledordersthatstoresthenamesofcoffeesaskeysandthenumbersoldasvalues. "CareerKarmaenteredmylifewhenIneededitmostandquicklyhelpedmematchwithabootcamp.Twomonthsaftergraduating,Ifoundmydreamjobthatalignedwithmyvaluesandgoalsinlife!" Venus,SoftwareEngineeratRockbot FindYourBootcampMatch Then,weusethesorted()methodtosorttheordersdictionarybyvalue.Here’sabreakdownofhowweusedthesorted()method: ParameterTextDescriptionobjectorders.items() Referstoallvaluesinour“orders”dictionary.Ifweweretousejust“orders”,wewouldhavetoreferencetheindexpositionoftheitemtogetitsindividualvalue.Whereasifweuseorders.items(),aniterablelistwiththeitemsinalistiscreated.keykey=lambdax:x[1]Asortingmechanismthatallowsustosortourdictionarybyvalue.ThisisanexampleofaLambdafunction,whichisafunctionwithoutaname.reversereverse=TrueStatesthatwewantourdatatobesortedindescendingorder. Finally,wecreateaforloopthatloopsthrougheachitemcreatedinoursort_ordermethodandprintsoutbothitskeynameanditsvalue,sortedintheorderwespecifiedinthesort_orderfunction. Example2:SortinAscendingOrder Similarly,ifwewantedtofindouttheleastpopulardrinksoldatourcoffeeshop,wecouldusethesamecodeasabovebutwithoutthereverse=Trueparameter.Here’sanexampleofthecodeforthis: orders={ 'cappuccino':54, 'latte':56, 'espresso':72, 'americano':48, 'cortado':41 } sort_orders=sorted(orders.items(),key=lambdax:x[1]) foriinsort_orders: print(i[0],i[1]) Whenwerunourcode,thefollowingvaluesarereturned: cortado41 americano48 cappuccino54 latte56 espresso72 Asyoucansee,ourcodereturnedalistofitemsarrangedinascendingorder,basedonthenumberofeachitemorderedinthelastmonth. »MORE: PythonCollections:AStep-By-StepGuideListComprehension Inaddition,wecanuselistcomprehensiontosortdictionarycontentsbyvalue.ListcomprehensionisaconcisetechniquetocreatelistsinPythonandcansavespaceifyouarecreatingmorecomplexsortmethods. Here’sthecodewewouldusetosortourcoffeeordersinascendingorderbythenumberofeachcoffeethatwasorderedusinglistcomprehension: orders={ 'cappuccino':54, 'latte':56, 'espresso':72, 'americano':48, 'cortado':41 } [print(key,value)for(key,value)insorted(orders.items(),key=lambdax:x[1]) Whenwerunourcode,thefollowingresponseisreturned: cortado41 americano48 cappuccino54 latte56 espresso72 Theresultofourcodewasthesameasouraboveexamplewherewesortedthecontentsoftheorderslistinascendingorder.Butinsteadofdefiningasort_ordersvariableandcreatingaseparateforlooptoiteratethroughthesortedlist,wecreatedalistusingthelistcomprehensiontechnique. Thelistcomprehensionwecreatedabovesortsthrougheachiteminourlistinascendingorder,thenprintsoutthekeyandvalueofeachdictionaryitemtotheconsole. Conclusion Whenyou’reworkingwithdictionariesinPython,sortingadictionarybyvalueisacommonoperation.Thesorted()methodallowsyoutosortasetofdatabasedonyourneeds. Thistutorialdiscussed,providingexamples,howtousethesorted()methodtosortadictionarybyvalueinPython,includinghowtousethekeyandreverseparameters.  Nowyou’rereadytostartsortingdictionariesbyvaluelikeaPythonpro! 5Ratings Aboutus:CareerKarmaisaplatformdesignedtohelpjobseekersfind,research,andconnectwithjobtrainingprogramstoadvancetheircareers.LearnabouttheCKpublication. What'sNext? Wanttotakeaction? Getmatchedwithtopbootcamps Wanttodivedeeper? Askaquestiontoourcommunity Wanttoexploretechcareers? Takeourcareersquiz JamesGallagher JamesGallagherisaself-taughtprogrammerandthetechnicalcontentmanageratCareerKarma.HehasexperienceinrangeofprogramminglanguagesandextensiveexpertiseinPython,HTML,CSS,andJavaScript.Jameshaswrittenhundredsofprogrammingtutorials,andhefrequentlycontributestopublicationslikeCodecademy,Treehouse,Repl.it,Afrotech,andothers.He...readmore ReadmorebyJamesGallagher ShareThis PreviousArticleHowtoCodetheFibonacciSequenceinPython NextArticlePython'str'objectdoesnotsupportitemassignmentsolution Jul28,2020 Comments(1) Yokisays: Jun16,2020at3:30pm Thanksfortheexplanation,ithelpedmetosolvemyassignment!! 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