dictreader.py

#!/usr/bin/env python
import csv
import sys
import random

# For each argument to the program
for arg in sys.argv[1:]:
    # Store all the data
    rows = list(csv.DictReader(open(arg)))
    trackers = list(set(row['Tracker'] for row in rows))

    # Pick a random tracker
    tracker = trackers[random.randint(0, len(trackers)-1)]

    # Print the data
    for row in ( row for row in rows if row['Tracker'] == tracker ):
        # The following 2 lines are equal
        #print "[%s] %s: %s" % (row['Tracker'], row['Author'], row['Subject'])
        print "[%(Tracker)s] %(Author)s: %(Subject)s" % row