SplitperYear

splitPerYear

src_path = "" #here you need to input the directory that contains the file
main_file = "" #here you need to input the name of the file
import csv
import collections
import pprint

with open(main_file, "rb") as fp:
    root = csv.reader(fp, delimiter='\t')
    result = collections.defaultdict(list)
    for row in root:
        year = row[3].split("-")[0] #change the row number if the dates are in a different column
        result[year].append(row)

print "Result:-"        
pprint.pprint(result)

for i,j in result.items():
    file_path = "%s%s.csv"%(src_path, i)
    with open(file_path, 'wb') as fp:
        writer = csv.writer(fp, delimiter='\t')
        writer.writerows(j)