Reconciling os.path.getmtime vs ftp.sendcmd('MDTM filename')

[Tim Johnson]

I have written a class that uses ftplib.FTP as the parent.
I need to reconcile the modified time of a workstation file with
that same filename on a remote server.
Let's say we have a file called '400.shtml'. I get the mtime on
my workstation by1311648420.0
And I use'213 20110726004703'

My question is how to compare the two outputs?
Pointers to documentation and other resources are invited.

thanks