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Goal: Learn how to inquiry about a file in CDAT.

# open example NetCDF file 
import cdms, os, sys
filepath = os.path.join(sys.prefix, 'sample_data/clt.nc')
f = cdms.open( filepath )

# print the list of all variables in the file
f.listvariable()  
['clt','u','v']
# or equivalent
f.listvariables()
f.showvariable()

# print a list of the dimensions in the file
f.listdimension()       
['plev', 'latitude1', 'latitude2', 'time1', 'longitude1', 
'longitude2', 'longitude', 'time', 'latitude', 'plev1', 'time2']

# print the file's defined global attributes
f.listglobal()
['center', 'comments', 'Conventions', 'model']

# print a list of the dims of variable 'u'
f.showdimension('u')
Dimension names of u in file /home/mccoy20/utils/cdat/sample_data/clt.nc:
['time1', 'plev', 'latitude1', 'longitude1']

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