And you should use cursor.fetchall() instead of cursor in list
comprehension:
packageIDs = [itm[0] for itm in cursor.fetchall()]
On Sat, Jan 9, 2010 at 1:01 PM, Gabriel Genellina <gagsl-...@yahoo.com.ar>wrote:
> En Sat, 09 Jan 2010 11:01:25 -0300, Victor Subervi <
> victorsube...@gmail.com> escribió:
>
>> On Sat, Jan 9, 2010 at 8:39 AM, Tim Chase <python.l...@tim.thechases.com
>> >wrote:
>>
>> It would also help if you didn't pass the categoryID as a
>>> string-formatted
>>> value, but as a proper parameter, something like
>>>
>>> sql = "... where c.categoryid=?" % (store, store)
>>> cursor.execute(sql, (category_id,))
>>>
>>>
>> I now have the following:
>>
>> sql = 'select distinct p.ID from %sPackages p join
>> %sCategoriesPackages c where c.CategoryID=?;' % (store, store)
>> cursor.execute(sql, (categoryID,))
>> packageIDs = [itm[0] for itm in cursor]
>>
>> It threw this error:
>>
>> TypeError: not all arguments converted during string formatting
>> args = ('not all arguments converted during string formatting',)
>>
>> You'd have to check the place-holder character for your particular
>>> back-end:
>>>
>>> >>> import <your database engine> as db
>>> >>> print db.paramstyle
>>>
>>> Printed "format". What's that mean? I use MySQLdb
>>>
>>
> That means, MySQLdb uses %s as a placeholder for parameter substitution --
> same as Python when doing string interpolation. Unfortunately this will
> confuse things. In your code above, the ? near the end should become %s --
> but you don't want THAT %s to be interpreted by Python at that time, instead
> it must remain as a literal %s until the cursor.execute line. You have to
> escape the % by doubling it: %%s
>
> sql = 'select distinct p.ID from %sPackages p join
> %sCategoriesPackages c where c.CategoryID=%%s;' % (store, store)
>
> cursor.execute(sql, (categoryID,))
> packageIDs = [itm[0] for itm in cursor]
>
> --
> Gabriel Genellina
>
>
> --
> http://mail.python.org/mailman/listinfo/python-list
>
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