Re: [Zope] Lines data type possible in boolean OR's?
- Original Message -
From: "Martijn Pieters" <[EMAIL PROTECTED]>
> On Mon, Jul 24, 2000 at 11:56:01PM +0200, Alexander Limi wrote:
> > I have a small problem. When I use the lines data type in OR statements,
I
> > get an
> >
> > Error Type: TypeError
> > Error Value: bad operand type(s) for |
> >
> > I've used them earlier on integers, like this:
> >
> >
> >
> > and it works fine. When I try the same with other data types, like this:
> >
> >
> >
> > where "toy" is a "multiple select" type and "additionalToys" is a
"lines"
> > type. Can anyone provide me with some hints on what to do to get it
working
> > the way I want? Is typecasting necessary?
>
> A pipe symbol in python ('|') is a bitwise 'or', so it works on integers
yes.
> I assume you want to to a boolean 'or', wich in python is the keyword
'or':
I figured that out after a while, but the original problem remained: The
Lines type does not evaluate to FALSE in boolean expressions, even when
empty.
Empty lines are contain [''], so I have to use a string.join() to get it to
be '', which evaluates to false.
I know lines is a set of some sort, but shouldn't it evaluate to FALSE in
boolean expressions anyway? Is there a reason why it doesn't?
--
Alexander Limi
[EMAIL PROTECTED]
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Re: [Zope] Lines data type possible in boolean OR's?
On Mon, Jul 24, 2000 at 11:56:01PM +0200, Alexander Limi wrote:
> I have a small problem. When I use the lines data type in OR statements, I
> get an
>
> Error Type: TypeError
> Error Value: bad operand type(s) for |
>
> I've used them earlier on integers, like this:
>
>
>
> and it works fine. When I try the same with other data types, like this:
>
>
>
> where "toy" is a "multiple select" type and "additionalToys" is a "lines"
> type. Can anyone provide me with some hints on what to do to get it working
> the way I want? Is typecasting necessary?
A pipe symbol in python ('|') is a bitwise 'or', so it works on integers yes.
I assume you want to to a boolean 'or', wich in python is the keyword 'or':
--
Martijn Pieters
| Software Engineermailto:[EMAIL PROTECTED]
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[Zope] Lines data type possible in boolean OR's?
Hi, I have a small problem. When I use the lines data type in OR statements, I get an Error Type: TypeError Error Value: bad operand type(s) for | I've used them earlier on integers, like this: and it works fine. When I try the same with other data types, like this: where "toy" is a "multiple select" type and "additionalToys" is a "lines" type. Can anyone provide me with some hints on what to do to get it working the way I want? Is typecasting necessary? Thanks in advance. Alexander. PS: please CC me if you answer :) ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
