analyze a csv of local violations

analyze.py

import csv
import operator

count = 1
previousCategory = None
previousDate = None
previousCount = 1

with open('Violations-2012.csv', 'rb') as csvfile:
  spamreader = csv.reader(csvfile, delimiter=',', quotechar='"')
  sortedlist = sorted(spamreader, key=operator.itemgetter(2, 3), reverse=False)

  for i, row in enumerate(sortedlist):
    if previousCategory != row[2]:

      if previousCategory != None:
        print "Latest Entry in", previousCategory, "happend on", previousDate
        print previousCategory, "has", count, "total entries"

      print ""

      if i +1 != len(sortedlist):
        print "Earliest Entry in", row[2], "happend on", row[3]

      count = 1
    else:
      count = count + 1

    previousCategory = row[2]
    previousDate = row[3]
    previousCount = count