Saving a file as netCDF4 in Python

[Jamie Mitchell]

Dear all,

Apologies as this sounds like a very simple question but I can't find an answer anywhere. 

I have loaded a netCDF4 file into python as follows:

swh=netCDF4.Dataset('path/to/netCDFfile,'r')

I then isolate the variables I wish to plot:

hs=swh.variables['hs']
year=swh.variables['year']

I would then like to save these hs and year variables so that I don't have to isolate them every time I want to plot them.

Any help would be much appreciated.

Cheers,

Jamie