def pythagorean_triplets(limits) :
   c, m = 0, 2
   while c < limits :
   for n in range(1, m) :
      a = m * m - n * n
      b = 2 * m * n
      c = m * m + n * n
      if c > limits :
         break
      print(a, b, c)
   m = m + 1
upper_limit = 15
print("上限是:")
print(upper_limit)
print("勾股三元组是:")
pythagorean_triplets(upper_limit)

上限是:
15
勾股三元组是:
3 4 5
8 6 10
5 12 13