Randomly appearing issue with random generator

[halfdan]

Not sure what causes this, but I sometimes run into this. After a restart everything works fine.

Traceback (most recent call last):
  File "./google2piwik.py", line 665, in <module>
    export_period(start_date, end_date)
  File "./google2piwik.py", line 72, in export_period
    export_day(str(currentdate), fetcher)
  File "./google2piwik.py", line 132, in export_day
    simulator.finalize(additional)
  File "./google2piwik.py", line 406, in finalize
    visit.finalize(additional)
  File "./google2piwik.py", line 281, in finalize
    self.set_final_value("md5config", hash_generator.get_md5(self.get_final_value("visit_server_date")))
  File "./google2piwik.py", line 427, in get_md5
    self.populate_current_date()
  File "./google2piwik.py", line 442, in populate_current_date
    self.date_basket = chain(not_yet_taken, cycle(random.sample(self.month_basket, self.date_unique[self.current_date] - len(not_yet_taken))) )
  File "/usr/lib/python2.6/random.py", line 316, in sample
    raise ValueError, "sample larger than population"
ValueError: sample larger than population