[web2py] Is there a default file upload when filling forms?

[Jason Brower]

I need the avatar (IS_IMAGE) in my authentication table to have a
default if nothing is entered.  Is this easily possible?  I was thinking
of having it controller side and just check if it was blank... if so,
default it.
The image would be based on the auth_user tables .sex value.  Any ideas
how to accomplish this?
Best Regards,
Jason Brower