gistfile1.py

#!/usr/bin/python

import csv
import re
from collections import Counter, OrderedDict

count_total = Counter()
count_by_date = {}

def get_count_today(by_date):
  if not by_date in count_by_date:
    count_by_date[by_date] = Counter()

  return count_by_date[by_date]

  
with open('dribbble.csv', 'rb') as csvfile:
  spamreader = csv.reader(csvfile, delimiter=',')
  for row in spamreader:
    delimiters = "; "
    regexPattern = '|'.join(map(re.escape, delimiters))
    tags_string=row[11]
    by_date = row[8]

    # Count the tags
    tags = re.split(regexPattern, tags_string)
    for t in tags:
      if t:
        count_total[t] += 1
        get_count_today(by_date)[t] += 1

print "Total\n\n", count_total.most_common(50), "\n\n"
print "By Date:"
for by_date_counter in OrderedDict(sorted(count_by_date.items(), key=lambda t: t[0])):
  print by_date_counter, ": \n", count_by_date[by_date_counter].most_common(50)