Матрица Python
import random n = 4 m = 6 matrix = [] for i in range ( n ) : # формируем исходную матрицу line = [] for j in range ( m ) : line. append( round ( random . random () * 10 ) - 5 ) # от -5 до 5 matrix. append( line ) for line in matrix: # вывод исходной матрицы for i in line: print ( '%4d' % i , end = '' ) print () print () for line in matrix: # изменение матрицы summa = 0 i = 0 while i < m- 1 : summa + = line [ i ] i + = 1 else : line [ m- 1 ] = summa for line in matrix: # вывод измененной матрицы for i in line: print ( '%4d' % i , end = '' ) print ()