import os def system(x): print x os.system(x) for day in ['2014-12-10', '2014-12-11', '2014-12-12', '2014-12-13', '2014-12-14', '2014-12-15', '2014-12-16', '2014-12-17', '2014-12-18', '2014-12-19', '2014-12-20', '2014-12-21', '2014-12-22', '2014-12-23', '2014-12-24', '2014-12-25', '2014-12-26', '2014-12-27', '2014-12-28']: system( 'client.py --cmd "umworld doit run KnowledgeBase --num-process 4 --day {day}"' '--task-name "doit knowledge_base {day}"'.format(day=day) )