Nptel The Joy Of Computing Using Python | NPTEL Week 7 Programming Assignment | NPTEL Assignment Solutions

NPTEL The Joy Of Computing Using Python Week 7 Programming Assignment | NPTEL Swayam Assignment Answers 

Nptel Week 7 Programming Assignment Answers:

Q.1: Given a sqaure matrix M, write a function DiagCalc which calculate the sum of left and right diagonals and print it respectively.(input will be handled by us)

Input:

A matrix M 

[[1,2,3],[3,4,5],[6,7,8]] 

Output 

13

13

Explanation:

Sum of left diagonal is 1+4+8 = 13

Sum of right diagonal is 3+4+6 = 13

Code:

def DiagCalc(M): sum1=0 sum2=0 for i in range(n): sum1+=M[i][i] sum2+=M[i][n-i-1] print(sum1) print(sum2,end="")

Q.2: Given a matrix M of MxN write a function Transpose which accepts a matrix M and return the transpose of M.

Transpose of a matrix is a matrix in which each row is changed to a column or vice versa.

Input 

A matrix M

[[1,2,3],[4,5,6],[7,8,9]]

Output

Transpose of M

[[1,4,7],[2,5,8],[3,6,9]]

Code:

def Transpose(M): l=[] for i in range(len(M[0])): k=[] for j in range(len(M)): k.append(M[j][i]) l.append(k) return l

Q.3: Given a matrix M of MxN write a function snake that accepts a matrix M and returns a list which contain elements in snake pattern of matrix M. (See explanation to know what is snake pattern)

Input

A matrix M

91 59 21 63 

81 39 56 8 

28 43 61 58 

51 82 45 57

Output

[91, 59, 21, 63, 8, 56, 39, 81, 28, 43, 61, 58, 51, 82, 45, 57]

Explanation:

For row 1 elements are inserted from left to right

For row 2 elements are inserted from right to left

For row 3 elements are inserted form left to right 

and so on

Code:

def snake(M): l=[] for i in range(n): if i%2==0: l+=M[i] else: l+=M[i][::-1] return l

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