TypeError in date_parse.py

[John Gordon]

In <09d39e02-c741-4a46-b34f-551e11118e7b at googlegroups.com> pestrella at gmail.com writes:

> =============================
>     # Compute duration for this item.
>         duration = None
>         if end_timestamp and start_timestamp:
>             start_datetime = datetime.fromtimestamp(float(start_timestamp))
>             end_datetime = datetime.fromtimestamp(float(end_timestamp))
>             duration = end_datetime - start_datetime
> =============================

What is the type and value of start_timestamp and end_timestamp?

-- 
John Gordon                   A is for Amy, who fell down the stairs
gordon at panix.com              B is for Basil, assaulted by bears
                                -- Edward Gorey, "The Gashlycrumb Tinies"