Preprocess script

[Saszalez]

Hi all.

I'm using Python to process climate data and use it in a weather model. To do this, there was a script in Python2, which I modified to adapt it to Python3. I have a part of the code, which when I execute it gives me the following error:

Error:
 File "./preprocess.py", line 223, in calc
    grbout.write('msg', 'utf-8')
TypeError: write() takes exactly one argument (2 given)

The part of the code to which it refers is the following:

        #logger.info("Calculating soil moisture and filling skintemp for %s" % ffile)
        logger.info("Calculating soil moisture for %s" % ffile)
        smfile = prefix + "calc_" + infix + suffix
        if os.path.isfile(smfile):
            os.remove(smfile)
        grbout = open(smfile, "w")
        grbs = pygrib.open(os.path.join(DATADIR, ffile))
        grbs.seek(0)
        #have_sst = False
        #have_skt = False
        for grb in grbs:
            if grb.indicatorOfParameter == 140:
                sm_values = grb.values/sm_at_field_capacity
                grb.indicatorOfParameter = 142
                grb.indicatorOfTypeOfLevel = 'sfc'
                grb.typeOfLevel = 'depthBelowLand'
                for level in SM_LEVELS.keys():
                    grb.level = level
                    grb.values = sm_values*SM_LEVELS[level]
                    msg = grb.tostring()
                    grbout.write(msg)
            #elif grb.indicatorOfParameter == 139:
            #    skt_grb = grb
            #    have_skt = True
            #elif grb.indicatorOfParameter == 103:
            #    sst_grb = grb
            #    have_sst = True
            #if have_sst and have_skt:
            #    values = skt_grb.values*sea_land_mask + sst_grb.values*(1-sea_land_mask)
            #    skt_grb.values = values
            #    skt_grb.indicatorOfParameter = 143
            #    msg = skt_grb.tostring()
            #    grbout.write(msg)
            #    del sst_grb
            #    del skt_grb
            #    have_sst = False
            #    have_skt = False
        grbs.close()
        grbout.close()

I searched for the solution, but I'm not sure what coding to use.