174c174
< system = System(cpu = [CPUClass(cpu_id=i) for i in xrange(np)],
---
> system = System(cpu = [CPUClass(cpu_id=i) for i in range(np)],
223c223
< for i in xrange(np):
---
> for i in range(np):
249c249
< for i in xrange(np):
---
> for i in range(np):