m_x_n_matrix

#set matrix size
#create matrix, then print it. Return m and n
def set_matrix_size():
    m = int(input("Set m: "))
    n = int(input("Set n: "))        
    print("m=",m,"n=",n)
    matrix_nm(m,n)
    return m,n

#t is matrix with entries nxm and index number
t = {}
def matrix_nm(m,n):
    for i in range(1,n+1):
        for j in range(1,m+1):
            t[len(t)+1] = [i,j,len(t)+1]

#prints a line of a matrix
def print_line(m,n,x):
    for i in range(1,m+1):
        print('%-2s' % str(t[i+(x-1)*m][2]), end = " ")
        
#puts together lines of matrix and displays it
def print_matrix(m,n):
    for i in range(1,n+1):
        print_line(m,n,i)
        print("")

def main():
    m,n = set_matrix_size()
    print("")
    print(m, "x",n,"- Matrix: ")
    print_matrix(m,n)
    print("")
    print("'t'-Matrix:")
    print(t)
    
if __name__ == '__main__':
    main()