[web2py] Re: auth_user field default to other auth_user field?

[pbreit]

I don't think that's quite the behavior I'm looking for. I want it to 1) 
default.paypal_email=email upon registration and 2) both email and 
paypal_email editable independently in Edit Profile.

So this would be perfect:
     
     Field('paypal_email', length=128, default=lambda r: r.email))

But "default" apparently doesn't take a lambda.