that’s this: 
http://docs.sqlalchemy.org/en/rel_0_9/changelog/migration_09.html#improved-rendering-of-boolean-constants-null-constants-conjunctions


On Jan 7, 2014, at 4:13 AM, limodou <limo...@gmail.com> wrote:

> I found a problem in 0.9.1 version:
> 
> in 0.8.x :
> >>> print (Blog.c.id==5) & None
> blog.id = :id_1
> 
> But in 0.9.1:
> >>> print (Blog.c.id==5) & None
> blog.id = :id_1 AND NULL
> 
> So I don't know if it's a bug?
> 
> 
> On Tue, Jan 7, 2014 at 2:25 AM, Jonathan Vanasco <jonat...@findmeon.com> 
> wrote:
> automap sounds neat!  thanks!
> 
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> -- 
> I like python!
> UliPad <<The Python Editor>>: http://code.google.com/p/ulipad/
> UliWeb <<simple web framework>>: https://github.com/limodou/uliweb
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