#!/usr/bin/env python3

# this version does a call to wgrib2 to create subset
# does not make or use inventory file

import pywgrib2_s
in_file='a.grb'
out='a_subset_3.grb'

pywgrib2_s.wgrib2( [in_file, '-match', ':(TMP:2 m above ground|PRATE|UGRD:10 m above ground):',
  "-grib", out] )

print("done  out=",out)