from pyo import *

s = Server().boot()
s.start()
wav = SquareTable()
env = CosTable([(0,0), (0,1), (200,.5), (100,10)])
met = Metro(.100, 1000).play()
amp = TrigEnv(met, table=env, mul=.1)
pit = TrigXnoiseMidi(met, dist='loopseg', x1=20, scale=1, mrange=(48,84))
out = Osc(table=wav, freq=pit, mul=amp).out()
s.gui(locals())

Traceback (most recent call last):
  Line 1, in <module>
    from pyo import *
ImportError: No module named pyo