Python Power Unleased :
import csv,sys
filename = 'a.csv'
with open(filename,'rb') as csvfile:
reader = csv.reader(csvfile,delimiter=',')
try:
for row in reader:
if row[1].find(',') == -1:
line = ','.join(row)
print line
else:
for i in range(0,row[1].count(',')+1):
line = row[0]+','+row[1].split(',')[i]+','+row[2].split(',')[i]
print line
except csv.Error as e:
sys.exit('file %s, line %d: %s' % (filename, reader.line_num, e))