----- Original Message ----- From: "Martijn Pieters" <mj@digicool.com>

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:

<dtml-if "cabinDouble | cabinTwin | cabinBunk | cabinPullman">

and it works fine. When I try the same with other data types, like this:

<dtml-if "toy | additionalToys">

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 alexander@limi.net