nc2txt

from netCDF4 import Dataset
import glob
import os

#ffiles = '*.nc'
ffiles = glob.glob('*.nc')
ff0 = Dataset(ffiles[0])
latt = ff0.variables['latitude'][:]
lonn = ff0.variables['longitude'][:]

for xx in range(len(lonn[:,1])):
        for yy in range(len(lonn[1,:])):
            if lonn[xx,yy]>=45 and lonn[xx,yy]<=60 and latt[xx,yy]>=67 and latt[xx,yy]<=72:
                ff_txt=open('txt\\%.2f-%.2f.txt' % (latt[xx,yy],lonn[xx,yy]),'w')
                for ifile in ffiles:
                    iifile = Dataset(ifile)
                    u = iifile.variables['meridional_motion'][0,xx,yy]
                    v = iifile.variables['zonal_motion'][0,xx,yy]
                    if u<>32767 and u<>'':
                        ff_txt.write('%s;%.0f;%.0f\n' % (ifile.split('.')[0],u,v))
                    else:
                        ff_txt.write('%s;999.;999.\n' % ifile.split('.')[0])
                try:
                    ff_txt.close()
                except:
                    pass


txt_files = glob.glob('txt\\*.txt')
for ifile in txt_files:
    statinfo = os.stat(ifile)
    if statinfo.st_size==0:
        os.remove(ifile)