Assignment 2

Due date: 2019-09-11, 23:59 IST.

Your last recorded submission was on 2019-09-10, 10:56 IST

1 point

Package that deals with dataframe is

numpy

dataframe

pandas

math

1 point

The data type of the following python object 'a' is: a={23, 24, 25, 26, 27}

list

dictionary

set

arrays

1 point

Variable ‘a’ is defined as
a = ‘gOOd moRning’
Command to convert ‘a’ from ‘gOOd moRning’ to ‘Good Morning’ is:-

a.upper( )

a.lower( )

a.string( )

a.title( )

1 point

Which of the following python data structure is immutable?

list

dictionary

tuple

array

1 point

Identify the braces used to create a dictionary in Python.

( )

{ }

[ ]

All of the above

1 point

The command used to add elements to a list

append( )

extend( )

insert( )

all of the above( )

Using the list ‘Stationery’ answer questions 7-8

Product = ['Pencil', 'Pen', 'Eraser', 'Pencil Box', 'Scale']

Price= [5, 10, 2, 20, 12]

Brand = ['Camlin', 'Rotomac', 'Nataraj', 'Camel', 'Apsara']

Stationery = [Product, Price, Brand]

1 point

The command to add “Notebook” as the first element inside the first level of the list “Stationery” is:-

Stationery[0].append('Notebook')

Stationery[0].insert(0,'Notebook')

Stationery[0][1] = "Notebook"

Stationery[0].extend('Notebook')

1 point

Command to replace the element of Brand, “Camel” with “Camlin” inside the list is:-

Stationery[2][3].append('Camlin')

Stationery[2].insert(3,'Camlin')

Stationery[2][3] = "Camlin"

none of the above

1 point

The list "Months" is defined as:-

Months = ['Jan', 'Mar', 'June', 'Aug', 'June', 'Feb', 'Nov', 'Dec', 'June', 'Apr', 'May', 'June']

Which of the following commands returns the number of occurrences of ‘June’?

Months.count('June')

Months.len('June')

Months[‘June’].count()

Months[‘June’].len()

1 point

Choose the correct command to sort 'Ages' in ascending order

Ages = [ ’20’, ‘26’, ‘56’, ‘54’, ‘32’, ‘28’, ‘23’, ‘99’, ‘87’, ‘10’, ‘65’, ‘88’, ‘66’,
‘48’, ‘42’, ‘27’, ‘33’, ‘38’, ‘83’, ‘94’, ‘66’, ‘44’]

sorted(Ages, reverse=False)

Ages.sort()

sorted(Ages, reverse=True)

both A and B

Answer questions 11 and 12 using the information given below:

D = [‘MONDAY’, ‘TUESDAY’, ‘WEDNESDAY’, ‘THURSDAY’, ‘FRIDAY’, ‘SATURDAY’, ‘SUNDAY’]

1 point

The command to print WEDNESDAY, THURSDAY from the list “D” is

print(D[-5], D[-4])

print(D[3], D[4])

print(D[2:5])

all of the above

1 point

The command used to reverse the above list “D” is:-

reverse(D)

D.reverse()

list(reversed(D))

both B and C

1 point

The command to clear all the elements from a Set is:-

remove( )

discard( )

clear( )

all of the above( )

Answer questions 14 and 15 using the information given below:

Mylist =[‘a’, ‘a’, ‘b’, ‘b’, ‘b’, ‘c’, ‘c’, ‘d’, ‘e’]

1 point

The output of the code: Mylist.index(‘d’) is

1 point

The output after you run the command:
Mylist.pop(0) print(Mylist)

[‘a’, ‘a’, ‘b’, ‘b’, ‘b’, ‘c’, ‘c’, ‘d’, ‘e’]

[‘a’, ‘b’, ‘b’, ‘b’, ‘c’, ‘c’, ‘d’, ‘e’]

[‘a’, ‘a’ ‘b’, ‘b’, ‘b’, ‘c’, ‘c’, ‘d’]

[‘b’, ‘b’, ‘b’, ‘c’, ‘c’, ‘d’, ‘e’]

1 point

The command to find the number of elements in the following list “N”
N = [24, 27, 29, 26, 25, 23, 20]

len(N)

N.count()

N.len()

count(N)

Create a dictionary ‘Country’ that maps the following countries to their capitals respectively.

1 point

The command to replace “Sydney” with “Canberra” is:-

Country['Australia']="Canberra"

Country.update({"Australia":"Canberra"})

Both A and B

None of the above

Create the following sets X1 and X2 using the data provided below and answer the questions 18 and 19

1 point

The output of X1.intersection(X2) will be

{0,1,7,8}

{1,3,7,8}

{1,2,7,8}

{1,4,7,8}

1 point

The command X1.symmetric_difference(X2)

returns all elements belonging to both set X1 and X2

returns elements belonging to X1 but not X2

returns elements not common to both sets X1 and X2

returns elements common to X1 and X2

1 point

Which of the following is a code template for creating objects in Python?

list

set

dictionary

class

Create the following Matrix “Y” in Python and answer questions 21 to 23 :

1 point

The determinant of the matrix “Y” rounded off to the zeroth decimal place is

110

120

1 point

Inverse of matrix “Y” rounded off to second decimal place is

([[- 0.73, 0.68, 0.11],

[0.09, -0.27, 0.04],

[0.18, 0.05, -0.13]])

([[ 0.73, -0.68, -0.11],

[-0.09, 0.27, -0.04],

[-0.18, 0.05, 0.13]])

([[ 0.73, 0.68, 0.11],

[0.09, 0.27, 0.04],

[0.18, 0.05, 0.13]])

([[- 0.73, -0.68, -0.11],

[-0.09, -0.27, -0.04],

[-0.18, -0.05, -0.13]])

1 point

The column sum of YT is

matrix([[11, 27, 25]])

matrix([[19, 14, 25]])

matrix([[19, 14, 30]])

matrix([[11, 27, 30]])

Python NPTEL

NPTEL » Python for Data Science

netaji gandi Wednesday, September 11, 2019

Assignment 1

Due date: 2019-09-11, 23:59 IST.

Your last recorded submission was on 2019-09-04, 21:20 IST

1 point

The command used to clear console in Spyder is:-

reset

%clear

%reset

remove

1 point

Which of the following is a valid variable name?

‘.ram2’

‘ram.2’

‘ram_2’

‘2ram’00

1 point

Python files are saved with extension

.py

.python

.pe

.pi

1 point

Which of the following statement is invalid?

m_n_q = 3500

m.n.q = 3500, 3600, 3700

m,n,q = 3500, 3600, 3700

mnq = 350036003700

1 point

The command to display an output in Python is:-

display( )

output( )

run( )

print( )

1 point

Assignment operator used in Python is: -

1 point

Consider the variables a and b. Values of a and b are 280 and 15 respectively. The operation that will return a remainder is: -

a/b

a%b

a**b

a*b

1 point

Python command used to calculate 25 is given by:-

2*5

2^5

2**5

2.exp(5)

1 point

The values of variables p and q are 15 and 3 respectively. What is the value of ‘p’ after running the code below?
p*=q

1 point

Which command would you use to find the data type of a variable

data( )

type( )

typeof( )

str( )

1 point

Value of variable p is 45. Command to coerce p from integer datatype to float datatype is:-

p=p.astype(‘float’)

p=float(p)

p=p.type(‘float’)

p=p.istype(‘float ’)

1 point

Indicate which command would you use to set the working directory

setwd()

os.chdir()

getwd()

cd()

1 point

Comments in Python begin with

1 point

What type of object is x?

x=(“Python”, “version”, “3.7”)

List

Tuple

String

Array

1 point

Which of the following method can be used to initialize multiple variables with a common value?
1.x=y: y=33
2.x=y=z=33
3.x=33; y=x; z=y
4.x,y,z=33

1 and 2

2 and 3

1 and 4

2 and 4

1 point

What will be the output after the following statements are executed?

X=300

Y= 17

X%=Y

print(X)

17.6

300

1 point

What is the command to clear a single variable ‘a’ from the variable explorer?

%reset

% clear

del a

rm a

1 point

Which of the package is used for visualization in Python

ggplot2

matplotlib

seaborn

All of the above

1 point

“not in” belongs to which type of operator in Python?

membership

bitwise

logical

arithmetic

1 point

“is not” belongs to which type of operator in Python?

membership

identity

logical

equality

Python NPTEL

NPTEL » Python for Data Science

netaji gandi

Week 5 Programming Assignment

Here are some basic facts about tennis scoring: A tennis match is made up of sets. A set is made up of games.

To win a set, a player has to win 6 games with a difference of 2 games. At 6-6, there is often a special tie-breaker. In some cases, players go on playing till one of them wins the set with a difference of two games.

Tennis matches can be either 3 sets or 5 sets. The player who wins a majority of sets wins the match (i.e., 2 out 3 sets or 3 out of 5 sets) The score of a match lists out the games in each set, with the overall winner's score reported first for each set. Thus, if the score is 6-3, 5-7, 7-6 it means that the first player won the first set by 6 games to 3, lost the second one 5 games to 7 and won the third one 7 games to 6 (and hence won the overall match as well by 2 sets to 1).

You will read input from the keyboard (standard input) containing the results of several tennis matches. Each match's score is recorded on a separate line with the following format:

Winner:Loser:Set-1-score,...,Set-k-score, where 2 ≤ k ≤ 5

For example, an input line of the form

Halep:Wozniacki:3-6,6-3,6-3

indicates that Halep beat Wozniacki 3-6, 6-3, 6-3 in a best of 3 set match.

The input is terminated by a blank line.

You have to write a Python program that reads information about all the matches and compile the following statistics for each player:

Number of best-of-5 set matches won
Number of best-of-3 set matches won
Number of sets won
Number of games won
Number of sets lost
Number of games lost

You should print out to the screen (standard output) a summary in decreasing order of ranking, where the ranking is according to the criteria 1-6 in that order (compare item 1, if equal compare item 2, if equal compare item 3 etc, noting that for items 5 and 6 the comparison is reversed).

For instance, given the following data

Federer:Nadal:2-6,6-7,7-6,6-3,6-1
Nadal:Federer:6-3,4-6,6-4,6-3
Federer:Nadal:6-0,7-6,6-7,6-3
Nadal:Federer:6-4,6-4
Federer:Nadal:2-6,6-2,6-0
Nadal:Federer:6-3,4-6,6-3,6-4
Federer:Nadal:7-6,4-6,7-6,2-6,6-2
Nadal:Federer:7-5,7-5
Halep:Wozniacki:3-6,6-3,6-3

your program should print out the following

Federer 3 1 13 142 16 143
Nadal 2 2 16 143 13 142
Halep 0 1 2 15 1 12
Wozniacki 0 0 1 12 2 15

You can assume that there are no spaces around the punctuation marks ":", "-" and ",". Each player's name will be spelled consistently and no two players have the same name.

Answer:

stats={}

line=input()

while line:

(wsets,lsets,wgames,lgames)=(0,0,0,0)

(winner,loser,setscores)=line.strip().split(':',2)

sets=setscores.split(',')

for set in sets:

(winstr,losestr)=set.split('-')

win=int(winstr)

lose=int(losestr)

wgames=wgames+win