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[netCDF #UZE-985140]: netcdf4 1.1.1 Illegal Characters

> Full Name: Aaron Scott
> Email Address: address@hidden
Hi Aaron,

> Organization: NASA Langley
> Package Version: 1.1.1
> Operating System: OSX
> Hardware:
> Description of problem: I am creating groups in a new netcdf4 file. I need 
> there to be groups within groups. Example:
> w = nc.Dataset(output_folder+'/'+granule_name[0]+"_Subset.nc","w", 
> format='NETCDF4')
> HDFEOS = w.createGroup("HDFEOS")
> SWATHS = w.createGroup("/HDFEOS/SWATH")
> So, I am trying to put the "SWATH" group into the "HDFEOS" group. It is 
> throwing this error:
> File 
> "/Users/akscott1/Documents/workspace/MOPITT_Python_Subsetter/python_subsetters/MOPITT_Python_Subsetter.py",
>  line 443, in hdf5subset
> SWATHS = w.createGroup("/HDFEOS/SWATH")
> File "netCDF4.pyx", line 1843, in netCDF4.Dataset.createGroup 
> (netCDF4.c:23172)
> File "netCDF4.pyx", line 2119, in netCDF4.Group.__init__ (netCDF4.c:27350)
> RuntimeError: NetCDF: Name contains illegal characters
> It does not like the "/" but how else do I create the groups without the "/' 
> for the correct path?

If you are using an up-to-date netcdf4-python module and w was returned from a 
or createGroup call, then that should work, as this example from the docs shows:

  >>> fcstgrp1 = rootgrp.createGroup("/forecasts/model1")
  >>> fcstgrp2 = rootgrp.createGroup("/forecasts/model2")

See the docs at http://unidata.github.io/netcdf4-python/ for more info on using 
createGroup for
creating nested subgroups. If it doesn't work, it's a bug that should be 
reported on the GitHub
site by creating an "issue" here: 


Russ Rew                                         UCAR Unidata Program
address@hidden                      http://www.unidata.ucar.edu

Ticket Details
Ticket ID: UZE-985140
Department: Support netCDF
Priority: Normal
Status: Closed