can't do __contains__ due to Python behavior:
class Foo(object):
def __add__(self, other):
return (self, "add", other)
def __contains__(self, other):
return (self, "contains", other)
f1 = Foo()
assert f1 + 5 == (f1, "add", 5)
assert 5 in f1 == (f1, "contains", 5), 5 in f1
second assertion fails, it forces a bool() on the result. __nonzero__() is
required to return True/False/int, I suppose we could make a custom int
subclass but that's getting really weird.
On Sep 4, 2012, at 10:50 AM, Eric Lemoine wrote:
> On Tue, Sep 4, 2012 at 4:45 PM, Michael Bayer <mike...@zzzcomputing.com>
> wrote:
>> they're in tip. thanks for testing all this !
>
>
> Great!
>
>
> Another issue, with "contains" this time:
>
>
>
> ----
> from sqlalchemy.types import UserDefinedType
>
>
> class Geometry(UserDefinedType):
>
> class comparator_factory(UserDefinedType.Comparator):
>
> def contains(self, other):
> return self.op('~')(other)
>
>
> from sqlalchemy import Table, Column, MetaData
>
> lakes = Table('lake', MetaData(),
> Column('geom', Geometry)
> )
>
> print str(lakes.c.geom.contains('POINT(1 2)'))
> ----
>
>
>
> produces this error:
>
>
> Traceback (most recent call last):
> File "comparator_factory.py", line 18, in <module>
> print str(lakes.c.geom.contains('POINT(1 2)'))
> File "/home/elemoine/src/sqlalchemy/lib/sqlalchemy/sql/operators.py",
> line 375, in contains
> return self.operate(contains_op, other, **kwargs)
> File "/home/elemoine/src/sqlalchemy/lib/sqlalchemy/sql/expression.py",
> line 2204, in operate
> return op(self.comparator, *other, **kwargs)
> File "/home/elemoine/src/sqlalchemy/lib/sqlalchemy/sql/operators.py",
> line 571, in contains_op
> return a.contains(b, escape=escape)
> TypeError: contains() got an unexpected keyword argument 'escape'
>
>
> I should be able to override "contains", no?
>
>
>
>
>
>
> --
> Eric Lemoine
>
> Camptocamp France SAS
> Savoie Technolac, BP 352
> 73377 Le Bourget du Lac, Cedex
>
> Tel : 00 33 4 79 44 44 96
> Mail : eric.lemo...@camptocamp.com
> http://www.camptocamp.com
>
> --
> You received this message because you are subscribed to the Google Groups
> "sqlalchemy" group.
> To post to this group, send email to sqlalchemy@googlegroups.com.
> To unsubscribe from this group, send email to
> sqlalchemy+unsubscr...@googlegroups.com.
> For more options, visit this group at
> http://groups.google.com/group/sqlalchemy?hl=en.
>
--
You received this message because you are subscribed to the Google Groups
"sqlalchemy" group.
To post to this group, send email to sqlalchemy@googlegroups.com.
To unsubscribe from this group, send email to
sqlalchemy+unsubscr...@googlegroups.com.
For more options, visit this group at
http://groups.google.com/group/sqlalchemy?hl=en.
