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Practical-sheet 3-v2 - Practical work
Engineering
National Institute of Technology Raipur
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CPDठ⃚forठ⃚Aठ⃚Levelठ⃚Computerठ⃚Science:ठ⃚Practicalठ⃚Sheetठ⃚3ठ⃚ठ⃚ Octoberठ⃚14ठ⃚
Page 1 of 3ठ⃚
Practicalठ⃚Sheetठ⃚3ठ⃚ Moreठ⃚Advancedठ⃚Python ठ⃚
1 Multipleठ⃚Dimensionalठ⃚Arraysठ⃚
ठ⃚
Exerciseठ⃚1:ठ⃚Sumठ⃚Columnsठ⃚ofठ⃚Tableठ⃚
Writeठ⃚aठ⃚functionठ⃚toठ⃚sumठ⃚theठ⃚columnsठ⃚ofठ⃚aठ⃚2ठ⃚dimensionalठ⃚arrayठ⃚(i.ठ⃚aठ⃚listठ⃚ofठ⃚lists).ठ⃚Theठ⃚
functionठ⃚shouldठ⃚workठ⃚forठ⃚anyठ⃚sizeठ⃚tableठ⃚(providingठ⃚itठ⃚isठ⃚regularठ⃚inठ⃚shape).ठ⃚ Note:ठ⃚thisठ⃚
exerciseठ⃚assumesठ⃚youठ⃚areठ⃚familiarठ⃚withठ⃚functions.ठ⃚Weठ⃚reviseठ⃚functionsठ⃚inठ⃚theठ⃚nextठ⃚session.ठ⃚
Forठ⃚example,ठ⃚with:ठ⃚
table1 = [
[1, 2, 3, 4],
[4, 5, 6, 7],
[8, 9,10,11] ]
weठ⃚get:ठ⃚
>>> sumCol(table1,0)
13
>>> sumCol(table1,1)
16
Exerciseठ⃚1:ठ⃚Swappingठ⃚Rowsठ⃚andठ⃚Columnsठ⃚
Writeठ⃚aठ⃚functionठ⃚toठ⃚swapठ⃚rowठ⃚andठ⃚columns,ठ⃚forठ⃚anyठ⃚sizeठ⃚orठ⃚shapeठ⃚ofठ⃚table.ठ⃚Thisठ⃚functionठ⃚isठ⃚
usuallyठ⃚calledठ⃚8transpose9.ठ⃚Forठ⃚example,ठ⃚withठ⃚table:ठ⃚
table2 = [
[1,2,3,4],
[5,6,7,8] ]
weठ⃚get:ठ⃚
>>> transpose(table2)
[[1, 5], [2, 6], [3, 7], [4, 8]]
Note:ठ⃚thisठ⃚exerciseठ⃚isठ⃚quiteठ⃚hard.ठ⃚
2 Python'sठ⃚Builtૐ퀐inठ⃚Typesठ⃚
2 Rangesठ⃚
ठ⃚
Exerciseठ⃚2:ठ⃚Tryingठ⃚Rangesठ⃚ Theठ⃚list()ठ⃚functionठ⃚createsठ⃚aठ⃚listठ⃚fromठ⃚aठ⃚range.ठ⃚Useठ⃚thisठ⃚toठ⃚experimentठ⃚withठ⃚ranges,ठ⃚ checkingठ⃚thatठ⃚youठ⃚understandठ⃚howठ⃚theyठ⃚work.ठ⃚Forठ⃚example:ठ⃚ range(10) range(10, 20) range(10, 40, 2) Hereठ⃚isठ⃚anठ⃚example:ठ⃚ >>> r = range(10) >>> list(r) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
CPDठ⃚forठ⃚Aठ⃚Levelठ⃚Computerठ⃚Science:ठ⃚Practicalठ⃚Sheetठ⃚3ठ⃚ठ⃚ Octoberठ⃚14ठ⃚
Page 2 of 3ठ⃚
Exerciseठ⃚2:ठ⃚Usingठ⃚Forठ⃚Loopsठ⃚ Practiceठ⃚usingठ⃚forठ⃚loops.ठ⃚Forठ⃚example,ठ⃚rewriteठ⃚theठ⃚followingठ⃚whileठ⃚loopठ⃚usingठ⃚aठ⃚forठ⃚loopठ⃚ andठ⃚aठ⃚range:ठ⃚ठ⃚ठ⃚ x= name="william" while x < len(name): print(x,":",name[x]) x = x + 1 Createठ⃚andठ⃚solveठ⃚someठ⃚similarठ⃚problems.ठ⃚ Exerciseठ⃚2:ठ⃚Teachingठ⃚Forठ⃚Loopsठ⃚ Discussठ⃚withठ⃚anotherठ⃚courseठ⃚memberठ⃚whenठ⃚/ठ⃚whetherठ⃚toठ⃚teachठ⃚forठ⃚loopsठ⃚(andठ⃚ranges)ठ⃚inठ⃚ Python.ठ⃚ठ⃚
2 Tuplesठ⃚
Exerciseठ⃚2:ठ⃚Tryingठ⃚Tupleठ⃚ Enterठ⃚aठ⃚tupleठ⃚suchठ⃚as:ठ⃚t = (3,1,5,8)ठ⃚Thenठ⃚tryठ⃚eachठ⃚ofठ⃚theठ⃚followठ⃚expressionsठ⃚toठ⃚seeठ⃚ifठ⃚ a)ठ⃚itठ⃚isठ⃚legalठ⃚b)ठ⃚whatठ⃚theठ⃚resultठ⃚is:ठ⃚ठ⃚ t[1] t[1:2] t[1:3] len(t) t[2]= ठ⃚ Exerciseठ⃚2:ठ⃚Twoठ⃚Listsठ⃚toठ⃚aठ⃚Listठ⃚ofठ⃚Pairsठ⃚ Writeठ⃚aठ⃚functionठ⃚thatठ⃚takesठ⃚twoठ⃚listsठ⃚andठ⃚returnsठ⃚aठ⃚listठ⃚ofठ⃚pairs.ठ⃚Thisठ⃚functionठ⃚isठ⃚oftenठ⃚ calledठ⃚8zip9.ठ⃚Forठ⃚example:ठ⃚ >>> zip([1,2,3],["a","b","c"]) [(1, 'a'), (2, 'b'), (3, 'c')] ठ⃚
2 Setsठ⃚
Exerciseठ⃚2:ठ⃚Multiplesठ⃚ofठ⃚7ठ⃚andठ⃚5ठ⃚ Supposeठ⃚weठ⃚wantठ⃚toठ⃚getठ⃚theठ⃚multiplesठ⃚ofठ⃚someठ⃚numberठ⃚N,ठ⃚belowठ⃚aठ⃚limitठ⃚L.ठ⃚Weठ⃚canठ⃚ expressठ⃚thisठ⃚asठ⃚aठ⃚range:ठ⃚range(N,ठ⃚L,ठ⃚N).ठ⃚Forठ⃚example:ठ⃚ Useठ⃚thisठ⃚ideaठ⃚andठ⃚theठ⃚setठ⃚intersectionठ⃚operationठ⃚toठ⃚writeठ⃚aठ⃚functionठ⃚toठ⃚giveठ⃚multiplesठ⃚ofठ⃚ twoठ⃚numbersठ⃚belowठ⃚someठ⃚limit.ठ⃚Hereठ⃚areठ⃚someठ⃚examples:ठ⃚ठ⃚ >>> multiplesNandM(5, 7, 100) [35, 70] >>> multiplesNandM(13, 17, 1000) [442, 884, 221, 663] ठ⃚
Practical-sheet 3-v2 - Practical work
Course: Engineering
University: National Institute of Technology Raipur
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