Convert grib files to text files

[tuxman]

Hi,

I want to read many grib files from a folder, and then save as text files. The name of the text file will be same name as grib file.
My code:

import pygrib, os, glob

LAT1 = None
LAT2 = None
LON1 = None
LON2 = None

def process_message(grb, outfile):
        with open(outfile, 'w') as output:
                tmps = "%s" % grb
                wtitle = tmps.split(':')[1]
                wtime = tmps.split(':')[len(tmps.split(':'))-1].split(' ')[1]
                data, lat, lons = grb.data(LAT1, LAT2, LON1, LON2)
                for i in xrange(len(data)):
                        tdata = data[i]
                        tlat = lat[i]
                        tlon = lons[1]
                for j in xrange(len(tdata)):
                        wdata = tdata[j]
                        wlat = tlat[j]
                        wlon = tlon[j]
                output.write("%s, %s, %s, %s, %s\n" % (wtitle, wtime, wlat, wlon, wdata)) 

os.chdir('/home/george/data')        
filenames = glob.glob('*.grb')

for f in filenames:
        #print f
        grbs = pygrib.open(f)
        grbs.seek(0)
        for grb in grbs:
            grb
            process_message(grb, f)
            os.rename(f, f + '.txt')
        grbs.close()

When I run the code, nothing happens...no errors, no text files was created.
Cheers !