Create NetCDF string variable?

Could someone post an example of using PyNio to create a NetCDF string
variable? I've tried:

fh = Nio.open_file('foobar.nc','w')
fh.create_dimension('x',10)
fh.create_dimension('y',10)
fh.create_dimension('z',20)
dims = ('x','y','z')
fh.create_variable('hellostring','s',dims)

And that is giving me an error. What am I doing wrong and what is the right
way I should be doing it?

Dan

-- 
-- 
Daniel Gilmore (AceInfo Solutions)
PGB/MDL/OST/NWS/NOAA
Office #: SSMC2-10357
Phone: 301.713.0224 x101
Cell: 703.232.9603

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Received on Mon Oct 29 06:24:47 2012