[ANN] istring 1.0.1 released; announce list created

Gerhard Häring gerhard at bigfoot.de
Wed Mar 6 08:04:47 EST 2002


Artur Skura wrote in comp.lang.python:
> Michael Ströder wrote:
>>>>>>s = i("Value is $n")
>> 
>> Maybe it's me but I can't see the advantage over using
>> 
>> >>> s = "Value is %s" % (n)
>> 
>> How about providing a more complex example illustrating the benefits 
>> of istring?
> 
> Should I paste from their page? ;)
> 
>         Why would I want to interpolate variables when I could use %s
>         notation?
> 
>       Ask yourself which query is clearer:
> 
>       (1) db.query("""SELECT    foo, bar
>                       FROM      %s
>                       WHERE     rsrc_id = %s
>                       AND       name = '%s'" % (table, rsrc_id, name))
> 
>       Or:
> 
>       (2) qry = istring("""SELECT   foo, bar
>                            FROM     $table
>                            WHERE    rsrc_id = $rsrc_id
>                            AND      name = $.name""")
                                             ^^^^^^^

There's a reason for cursor.execute(query_string, parameters) being in
the DB-API. Only the DB module can know how to put the parameters
there correctly with quoting and all.

Gerhard
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