import random
m = [[random.randint(-100, 100) for c in range(8)] for r in range(7)]
sum1 = [sum(m[x]) for x in range(7)]
print("Сумма строк", sum1)
sum2 = []
for x in range(8):
b = 0
for i in range(7):
b += m[i][x]
sum2.append(b)
print("Сумма столбцов", sum2)