import math  

for i in range(1, 50):
    if (math.sqrt((i * i+1)) == i*ii+1) :
        print("%s,%s,%s" % (i, i+1, i))

Traceback (most recent call last):
  Line 4, in <module>
    if (math.sqrt((i * i+1)) == i*ii+1) :
NameError: name 'ii' is not defined