Subtraction of 2 Matrices

def main() :
    row = int(input("Enter the number of rows in both the matrices : "))
    col = int(input("Enter the number of column in both the matrices : "))

    M1 , M2 , sum_mat = [],[],[]

    for i in range(2) :
        for j in range(row) :
            temp = []
            for k in range(col) :
                if i == 0 :
                    elem = eval(input("Enter the Element of the First Matrix at the Position Row : {} , Column : {} =====> ".format(j+1,k+1)))
                else : elem = eval(input("Enter the Element of the Second Matrix at the Position Row : {} , Column : {} =====> ".format(j+1,k+1)))
                temp.append(elem)
            if i == 0 : M1.append(temp)
            else : M2.append(temp)
    print('\nMatrix A : ')
    for l in M1 : print(l)
    print("\nMatrix B : ")
    for m in M2 : print(m)

    temp = []
    for i in range(row) :
        for j in range(col) :
            sum_elem = M1[i][j] - M2[i][j]
            temp.append(sum_elem)
        sum_mat.append(temp)
        temp = []

    print("\nResult Of Subtraction : ")
    for i in sum_mat : print(i)

main()