bug in example/basics_of_PyRATP.ipynb

[baugetfa]

running the 1st cell of example/basics_of_PyRATP.ipynb raises ImportError: cannot import name 'ratpvoxels2vtk' from 'openalea.ratp.RATP2VTK' that comes from

from openalea.ratp.RATP2VTK import ratpvoxels2vtk
SyntaxWarning: invalid escape sequence '\R'

That comes from the string in args:

  def ratpvoxels2vtk(grid, variable,varname="Variable",nomfich="C:\tmpRATP\RATPOUT.vtk"):

Two recommendations:

1. Either put a 'r' in front of it as r"C:\tmpRATP\RATPOUT.vtk"
2. do not use absolute path, typically this one won't work on osx or Linux

[pradal]

Also, all variables need to be in english:
nomfich -> filename.

A recommandation: do not give filename. Rather give a file handler. It is more generic.
Otherelse, just give a name : ratpout.vtk