Hi everyone, thanks for your help.
Yes, I'm using Mac OSX 1.3 with 256MB Ram. Each element in the list is a float. The list is actually a retrieved results of document IDs from SOAP interface. And Mac OSX does not have 'unlimit' command as shown, Maurice-Lings-Computer:~ mauriceling$ unlimit -bash: unlimit: command not found Maurice-Lings-Computer:~ mauriceling$ which unlimit Maurice-Lings-Computer:~ mauriceling$ sh unlimit unlimit: unlimit: No such file or directory Maurice-Lings-Computer:~ mauriceling$ Cheers Maurice -- http://mail.python.org/mailman/listinfo/python-list