[ferret_users] Fwd: pyferret.putdata not putting data

Dear Ferret/PyFerret community,

I'm using PyFerret as a Python module to take adavantage of Ferret's scat2gridgauss_xy external function, but, I've probably misunderstood the use of pyferret.putdata command. I'm not an experienced Python programmer.

The lon,lat,val triple is currently in my Python session as distinct lists which I convert to numpy arrays when I create python dictionaries to use as putdata arguments:

    lon_dict = {'name': 'lons', 'data': np.asarray(lon), 'title': 'Longitudes'}
    lat_dict = {'name': 'lats', 'data': np.asarray(lat), 'title': 'Latitudes'}
    val_dict = {'name': 'prec', 'data': np.asarray(val), 'title': 'INMET Prec'}

When I send these variables to Ferret's session, I notice any variable were passed:

    pyferret.start()
    pyferret.putdata(lon_dict)
    pyferret.putdata(lat_dict)
    pyferret.putdata(val_dict)
    pyferret.run('show data')

The code snippet above returns messages showing that Ferret session started but no data were loaded:

     NOAA/PMEL TMAP
     FERRET v6.82 (PyFerret 0.0.9)
     Linux 3.2.0-27-generic - 08/06/12
     16-Apr-14 18:42

     currently SET data sets:

I'm following the examples provided here
http://ferret.pmel.noaa.gov/Ferret/documentation/pyferret/data-dictionaries/

and here
http://ferret.pmel.noaa.gov/Ferret/documentation/pyferret/example-sessions-python/

My question is: what am I doing wrong?

Thanks!

Paulo Santiago

Ph.D. Student in Meteorology

Brazilian National Institute for Space Research

Tel.: +55 (12) 3186 8637