Question

Python programming question

Using an adjacency matrix:

Take a txt file and have the program read it and output the contents into an adjacency matrix.

- The txt file would have the size of the matrix and a list of names.

- Print the filled matrix of the names

- After each iteration, the program will ask, 'continue'?

- Show how to swap names for the next iteration(Program would take an input of two names and swap them)

Example:

input: 2, jerry, joe, bob, ian

The matrix would be 2x2 with those names. For the next iteration, input would be jerry, ian

- jerry and ian would be swapped when the new matrix is printed.

- After each iteration, the program will ask, 'continue'?

- no means program is done, yes means another swap.

Answer 1

ANSWER:-

CODE:-

def getIndex(matrix, name):
    for i in range(len(matrix)):
        for j in range(len(matrix[i])):
            if name == matrix[i][j]:
                return (i,j)
def printMatrix(matrix):
    for i in range(len(matrix)):
        for j in range(len(matrix[i])):
            print(matrix[i][j],end=" ")
        print()
def main():
    # open file in read mode
    file = open("names.txt","r")
    # it reads file as string
    data = file.read()
    # split data by ,
    data = data.strip('\n').split(",")
    n = int(data[0])
    matrix = []
    index = 1
    # fill matrix
    for i in range(n):
        matrix.append([])
        for j in range(n):
            matrix[i].append(data[index])
            index += 1
    print("Before swapping: ")
    printMatrix(matrix)
    while(True):
        # ask user to enter names
        names = input("\nEnter names to swap: ")
        names = names.split(",")
        # get indices of both names
        ind1 = getIndex(matrix,names[0])
        ind2 = getIndex(matrix,names[1])
        # swap names
        temp = matrix[ind1[0]][ind1[1]]
        matrix[ind1[0]][ind1[1]] = matrix[ind2[0]][ind2[1]]
        matrix[ind2[0]][ind2[1]] = temp
        # print modified matrix
        print("\nAfter swapping: ")
        printMatrix(matrix)
        # ask user to continue
        if(input("\nContinue?(yes/no) ").lower() == 'no'):
            print("Thanks")
            break
main()

NOTE:- If you need any modifications in the code,please comment below.Please give positive rating.THUMBS UP.

OUTPUT:-

CODE SCREENSHOT:-

           THANK YOU!!!