On 29 Jan 2013, at 9:42 AM, Alan Etkin <spame...@gmail.com> wrote:
> A similar caveat applies to the use of | or & in queries.
> 
> Ok, thanks for the tips Marin and Jonathan.
> 
> I assume then that the book's example should use parenthesis for negation, 
> since web2py cannot change the Python operator precedence.

Yes. Instead of:

rows = db((~db.person.name=='Alex') | (db.person.id>3)).select()

it should read:

rows = db(~(db.person.name=='Alex') | (db.person.id>3)).select()

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