sortmeteor.py

import csv

with open("Meteorite_Landings.csv","rb") as source:
    rdr= csv.reader(source)
    with open("results.csv","wb") as result:
        wtr= csv.writer( result )
        for r in rdr:
            del r[-3:]
            del r[:4]
            del r[-2]
            wtr.writerow( r )
            
with open("results.csv","rb") as source:
	rdr = csv.reader(source)
	with open("minimeteor.csv","wb") as result:
		wtr = csv.writer(result)
		next(rdr, None)
		wtr.writerow(['year', 'mass'])
		for r in rdr:
			str0 = ''.join(r)
			str1 = str0[-16:]
			str1 = str1[:4]
			str2 = str0[:-22]
			input = [str1, str2]
			wtr.writerow(input)