old_contents: import pygrib
  import numpy as np
  import matplotlib.pyplot as plt
  from mpl_toolkits.basemap import Basemap
  grbs = pygrib.open('../sampledata/dspr.temp.bin')
  for grb in grbs:
      if grb['forecastTime'] == 12:
          break
  data = grb['values']
  lats, lons = grb.latlons()
  llcrnrlon = lons[0,0]
  llcrnrlat = lats[0,0]
  urcrnrlon = lons[-1,-1]
  urcrnrlat = lats[-1,-1]
  rsphere = (grb.projparams['a'], grb.projparams['b'])
  lat_ts = grb.projparams['lat_ts']
  lon_0 = grb.projparams['lon_0']
  projection = grb.projparams['proj']
  fig=plt.figure()
  ax = fig.add_axes([0.1,0.1,0.75,0.75])
  m = Basemap(llcrnrlon=llcrnrlon,llcrnrlat=llcrnrlat,
              urcrnrlon=urcrnrlon,urcrnrlat=urcrnrlat,rsphere=rsphere,lon_0=lon_0,
              lat_ts=lat_ts,resolution='h',projection=projection)
  x,y = m(lons, lats)
  cs = m.contourf(x,y,data,20,cmap=plt.cm.jet)
  m.drawcoastlines()
  m.drawstates()
  m.drawcountries()
  m.drawmeridians(np.arange(280,300,1),labels=[0,0,0,1])
  m.drawparallels(np.arange(16,21,1),labels=[1,0,0,0])
  # new axis for colorbar.
  cax = plt.axes([0.875, 0.10, 0.03, 0.75])
  plt.colorbar(cs, cax, format='%g') # draw colorbar
  plt.axes(ax)  # make the original axes current again
  plt.title('NDFD Temp Puerto Rico %d-h fcst from %d' %\
          (grb['forecastTime'],grb['dataDate']),fontsize=12)
  plt.show()
  
new_contents: import pygrib
  import numpy as np
  import matplotlib.pyplot as plt
  from mpl_toolkits.basemap import Basemap
  grbs = pygrib.open('../sampledata/dspr.temp.bin')
  grb = grbs.select(forecastTime=26)[0]
  data = grb['values']
  lats, lons = grb.latlons()
  llcrnrlon = lons[0,0]
  llcrnrlat = lats[0,0]
  urcrnrlon = lons[-1,-1]
  urcrnrlat = lats[-1,-1]
  rsphere = (grb.projparams['a'], grb.projparams['b'])
  lat_ts = grb.projparams['lat_ts']
  lon_0 = grb.projparams['lon_0']
  projection = grb.projparams['proj']
  fig=plt.figure()
  ax = fig.add_axes([0.1,0.1,0.75,0.75])
  m = Basemap(llcrnrlon=llcrnrlon,llcrnrlat=llcrnrlat,
              urcrnrlon=urcrnrlon,urcrnrlat=urcrnrlat,rsphere=rsphere,lon_0=lon_0,
              lat_ts=lat_ts,resolution='h',projection=projection)
  x,y = m(lons, lats)
  cs = m.contourf(x,y,data,20,cmap=plt.cm.jet)
  m.drawcoastlines()
  m.drawstates()
  m.drawcountries()
  m.drawmeridians(np.arange(280,300,1),labels=[0,0,0,1])
  m.drawparallels(np.arange(16,21,1),labels=[1,0,0,0])
  # new axis for colorbar.
  cax = plt.axes([0.875, 0.10, 0.03, 0.75])
  plt.colorbar(cs, cax, format='%g') # draw colorbar
  plt.axes(ax)  # make the original axes current again
  plt.title('NDFD Temp Puerto Rico %d-h fcst from %d' %\
          (grb['forecastTime'],grb['dataDate']),fontsize=12)
  plt.show()
  
subject: use grbs.select