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100+Pythonchallengingprogrammingexercises

1. LeveldescriptionLevel DescriptionLevel1BeginnermeanssomeonewhohasjustgonethroughanintroductoryPythoncourse.Hecansolvesomeproblemswith1or2Pythonclassesorfunctions.Normally,theanswerscoulddirectlybefoundinthetextbooks.Level2IntermediatemeanssomeonewhohasjustlearnedPython,butalreadyhasarelativelystrongprogrammingbackgroundfrombefore.Heshouldbeabletosolveproblemswhichmayinvolve3or3Pythonclassesorfunctions.Theanswerscannotbedirectlybefoundinthetextbooks.Level3Advanced.HeshouldusePythontosolvemorecomplexproblemusingmorerichlibrariesfunctionsanddatastructuresandalgorithms.HeissupposedtosolvetheproblemusingseveralPythonstandardpackagesandadvancedtechniques.

2. Problemtemplate

##QuestionHintsSolution

3. Questions

##Question1Level1

Question:Writeaprogramwhichwillfindallsuchnumberswhicharedivisibleby7butarenotamultipleof5,between2000and3200(bothincluded).Thenumbersobtainedshouldbeprintedinacommaseparatedsequenceonasingleline.

Hints:Consideruserange(#begin,#end)method

Solution:l=[]foriinrange(2000,3201):

if(i%7==0)and(i%5!=0):l.append(str(i))

print','.join(l)##

##Question2Level1

Question:Writeaprogramwhichcancomputethefactorialofagivennumbers.Theresultsshouldbeprintedinacommaseparatedsequenceonasingleline.Supposethefollowinginputissuppliedtotheprogram:8Then,theoutputshouldbe:40320

Hints:Incaseofinputdatabeingsuppliedtothequestion,itshouldbeassumedtobeaconsoleinput.

Solution:deffact(x):

Thisrepository

565758596061626364656667686970717273747576777879808182

83

84858687888990919293949596979899

100101102103104105106107108109110111112113114115116117118119120121122123124125126127128

ifx==0:return1returnx*fact(x1)

x=int(raw_input())printfact(x)##

##Question3Level1

Question:Withagivenintegralnumbern,writeaprogramtogenerateadictionarythatcontains(i,i*i)suchthatisanintegralnumberbetween1andn(bothincluded).andthentheprogramshouldprintthedictionary.Supposethefollowinginputissuppliedtotheprogram:8Then,theoutputshouldbe:{1:1,2:4,3:9,4:16,5:25,6:36,7:49,8:64}

Hints:Incaseofinputdatabeingsuppliedtothequestion,itshouldbeassumedtobeaconsoleinput.Considerusedict()

Solution:n=int(raw_input())d=dict()foriinrange(1,n+1):

d[i]=i*i

printd##

##Question4Level1

Question:Writeaprogramwhichacceptsasequenceofcommaseparatednumbersfromconsoleandgeneratealistandatuplewhichcontainseverynumber.Supposethefollowinginputissuppliedtotheprogram:34,67,55,33,12,98Then,theoutputshouldbe:['34','67','55','33','12','98']('34','67','55','33','12','98')

Hints:Incaseofinputdatabeingsuppliedtothequestion,itshouldbeassumedtobeaconsoleinput.tuple()methodcanconvertlisttotuple

Solution:values=raw_input()l=values.split(",")t=tuple(l)printlprintt##

##Question5Level1

Question:Defineaclasswhichhasatleasttwomethods:getString:togetastringfromconsoleinputprintString:toprintthestringinuppercase.Alsopleaseincludesimpletestfunctiontotesttheclassmethods.

Hints:Use__init__methodtoconstructsomeparameters

Solution:classInputOutString(object):def__init__(self):self.s=""

129130131132

133134

135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182

183184185

186187188189190191192193194195196197198199200201

defgetString(self):self.s=raw_input()

defprintString(self):printself.s.upper()

strObj=InputOutString()strObj.getString()strObj.printString()##

##Question6Level2

Question:Writeaprogramthatcalculatesandprintsthevalueaccordingtothegivenformula:Q=Squarerootof[(2*C*D)/H]FollowingarethefixedvaluesofCandH:Cis50.His30.Disthevariablewhosevaluesshouldbeinputtoyourprograminacommaseparatedsequence.ExampleLetusassumethefollowingcommaseparatedinputsequenceisgiventotheprogram:100,150,180Theoutputoftheprogramshouldbe:18,22,24

Hints:Iftheoutputreceivedisindecimalform,itshouldberoundedofftoitsnearestvalue(forexample,iftheoutputreceivedis26.0,itshouldbeprintedas26)Incaseofinputdatabeingsuppliedtothequestion,itshouldbeassumedtobeaconsoleinput.

Solution:#!/usr/bin/envpythonimportmathc=50h=30value=[]items=[xforxinraw_input().split(',')]fordinitems:value.append(str(int(round(math.sqrt(2*c*float(d)/h)))))

print','.join(value)##

##Question7Level2

Question:Writeaprogramwhichtakes2digits,X,Yasinputandgeneratesa2dimensionalarray.Theelementvalueintheithrowandjthcolumnofthearrayshouldbei*j.Note:i=0,1..,X1;j=0,1,Y1.ExampleSupposethefollowinginputsaregiventotheprogram:

3,5Then,theoutputoftheprogramshouldbe:[[0,0,0,0,0],[0,1,2,3,4],[0,2,4,6,8]]

Hints:Note:Incaseofinputdatabeingsuppliedtothequestion,itshouldbeassumedtobeaconsoleinputinacommaseparatedform.

Solution:input_str=raw_input()dimensions=[int(x)forxininput_str.split(',')]rowNum=dimensions[0]colNum=dimensions[1]multilist=[[0forcolinrange(colNum)]forrowinrange(rowNum)]

forrowinrange(rowNum):forcolinrange(colNum):multilist[row][col]=row*col

printmultilist

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233234235236

237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275

##

##Question8Level2

Question:Writeaprogramthatacceptsacommaseparatedsequenceofwordsasinputandprintsthewordsinacommaseparatedsequenceaftersortingthemalphabetically.Supposethefollowinginputissuppliedtotheprogram:without,hello,bag,worldThen,theoutputshouldbe:bag,hello,without,world

Hints:Incaseofinputdatabeingsuppliedtothequestion,itshouldbeassumedtobeaconsoleinput.

Solution:items=[xforxinraw_input().split(',')]items.sort()print','.join(items)##

##Question9Level2

QuestionWriteaprogramthatacceptssequenceoflinesasinputandprintsthelinesaftermakingallcharactersinthesentencecapitalized.Supposethefollowinginputissuppliedtotheprogram:HelloworldPracticemakesperfect

Then,theoutputshouldbe:HELLOWORLDPRACTICEMAKESPERFECT

Hints:Incaseofinputdatabeingsuppliedtothequestion,itshouldbeassumedtobeaconsoleinput.

Solution:lines=[]whileTrue:s=raw_input()ifs:lines.append(s.upper())else:break;

forsentenceinlines:printsentence##

##Question10Level2

Question:Writeaprogramthatacceptsasequenceofwhitespaceseparatedwordsasinputandprintsthewordsafterremovingallduplicatewordsandsortingthemalphanumerically.Supposethefollowinginputissuppliedtotheprogram:helloworldandpracticemakesperfectandhelloworldagainThen,theoutputshouldbe:againandhellomakesperfectpracticeworld

Hints:Incaseofinputdatabeingsuppliedtothequestion,itshouldbeassumedtobeaconsoleinput.Weusesetcontainertoremoveduplicateddataautomaticallyandthenusesorted()tosortthedata.

Solution:s=raw_input()words=[wordforwordins.split("")]print"".join(sorted(list(set(words))))##

##Question11

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283284285286287

288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332

333334335336337338

339340341342343344345346347348

Level2

Question:Writeaprogramwhichacceptsasequenceofcommaseparated4digitbinarynumbersasitsinputandthencheckwhethertheyaredivisibleby5ornot.Thenumbersthataredivisibleby5aretobeprintedinacommaseparatedsequence.Example:0100,0011,1010,1001Thentheoutputshouldbe:

1010Notes:Assumethedataisinputbyconsole.

Hints:Incaseofinputdatabeingsuppliedtothequestion,itshouldbeassumedtobeaconsoleinput.

Solution:value=[]items=[xforxinraw_input().split(',')]forpinitems:intp=int(p,2)ifnotintp%5:value.append(p)

print','.join(value)##

##Question12Level2

Question:Writeaprogram,whichwillfindallsuchnumbersbetween1000and3000(bothincluded)suchthateachdigitofthenumberisanevennumber.Thenumbersobtainedshouldbeprintedinacommaseparatedsequenceonasingleline.

Hints:Incaseofinputdatabeingsuppliedtothequestion,itshouldbeassumedtobeaconsoleinput.

Solution:values=[]foriinrange(1000,3001):s=str(i)if(int(s[0])%2==0)and(int(s[1])%2==0)and(int(s[2])%2==0)and(int(s[3])%2==0):values.append(s)print",".join(values)##

##Question13Level2

Question:Writeaprogramthatacceptsasentenceandcalculatethenumberoflettersanddigits.Supposethefollowinginputissuppliedtotheprogram:helloworld!123Then,theoutputshouldbe:LETTERS10DIGITS3

Hints:

Incaseofinputdatabeingsuppliedtothequestion,itshouldbeassumedtobeaconsoleinput.

Solution:s=raw_input()d={"DIGITS":0,"LETTERS":0}forcins:

ifc.isdigit():d["DIGITS"]+=1elifc.isalpha():d["LETTERS"]+=1else:passprint"LETTERS",d["LETTERS"]print"DIGITS",d["DIGITS"]##

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383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422

##Question14Level2

Question:Writeaprogramthatacceptsasentenceandcalculatethenumberofuppercaselettersandlowercaseletters.Supposethefollowinginputissuppliedtotheprogram:Helloworld!Then,theoutputshouldbe:UPPERCASE1LOWERCASE9

Hints:Incaseofinputdatabeingsuppliedtothequestion,itshouldbeassumedtobeaconsoleinput.

Solution:s=raw_input()d={"UPPERCASE":0,"LOWERCASE":0}forcins:ifc.isupper():d["UPPERCASE"]+=