YouTube written in Python

[Leif K-Brooks]

Terry Reedy wrote:
> In a thread on the PyDev list, Guido van Rossum today wrote:
>> And I just found out (after everyone else probably :-) that YouTube is
>> almost entirely written in Python. (And now I can rub shoulders with
>> the developers since they're all Googlers now... :-)

Interesting. I wonder what they're using for a Web framework? Of course, 
sites that size generally use lots of custom stuff, but it would 
presumably be based on something.