I suspect this maybe another silly question which has taken ages to solve and I am tearing my hair out.

A number of scripts call for a library called PYB. I have tried to load this, but to no avail. The message I get back is as follows:

>>> import pyb
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: no module named 'pyb'
>>> 

I even tried :

>>> from pyb import LED
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: no module named 'pyb'
>>> 

Can you please shed some light on PYB, where I can find it, and how I incorporate it into a script or standard library set.

Many thanks.
Greg