[Python-ideas] Non-boolean return from __contains__

MRAB python at mrabarnett.plus.com
Tue Jul 27 21:24:49 CEST 2010

Bruce Leban wrote:
> The idea of LINQ is that you write the expression directly in the 
> language and it translates into a query expression. It's going to be 
> operating on an expression parse tree, right? Rather than trying to 
> change the allowable expressions maybe the question is to figure out how 
> to translate what we have and find what we can't express with what we 
> have (and that's an orthogonal question and has nothing to do with 
> __xxx__ functions).
> On Tue, Jul 27, 2010 at 9:42 AM, Masklinn <masklinn at masklinn.net 
> <mailto:masklinn at masklinn.net>> wrote: 
>     What about french quotes
>     expr = «x + y * z»
> Isn't there are already a syntax for this?
>     expr = lambda: x + y * z
> Maybe you want some conversion of that lambda into a different form:
>     expr = @ast lambda: x + y + z

     results = db => sql_expression

where the parse tree for "sql_expression" is passed to db.__linq__.

The parse tree is compiled to SQL and cached for possible future use.

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