(Nov-25-2017, 09:22 AM)heiner55 Wrote: @buran:
See page 124 in book:
https://pythonizame.s3.amazonaws.com/med...b6ba01.pdf
Maybe it could be PythonG
https://www3.uji.es/~dllorens/PythonG/
I think, instead of guessing, to wait for OP answer. In any case, there is third party library/package involved here. Probably you are right about PythonG