$ cat cleanup_use_psyco_and_list_compr.py #!/usr/bin/python import psyco psyco.full()
postpaid_file = open('/home/sajid/python/wip/stc/2/PSP0000333') outfile = open('/home/sajid/python/wip/stc/2/PSP-CBR.dat.psyco', 'w') barred = {} for number in open('/home/sajid/python/wip/stc/2/CBR0000333'): barred[number] = None # just add it as a key outfile.writelines([number for number in postpaid_file if number not in barred]) postpaid_file.close(); outfile.close() -- $ time ./cleanup_use_psyco_and_list_compr.py real 0m39.638s user 0m5.532s sys 0m0.868s This was run on my machine (w/ Python 2.4.1), can't install psyco on the actual server at the moment. I guess using generators & newer Python is indeed faster|better. -- fynali -- http://mail.python.org/mailman/listinfo/python-list