add up all the numbers in each row and output that number output the grand total of all rows

Add up all the numbers in each row and output that number
Output the grand total of all rows
total = 0
for x in variable:
  x_total = 0
  for y in x:
    x_total = int(y) + x_total
  print(x_total)
  total = x_total + total
print(total)