Generating unique, ordered Pythagorean triplets

Question

This is a program I wrote to calculate Pythagorean triplets. When I run the program it prints each set of triplets twice because of the if statement. Is there any way I can

Answer 1

Yes, there is.

Okay, now you'll want to know why. Why not just constrain it so that z > y? Try

for z in range (y+1, 1000)