[Zope] What's the typical conversion from a TALES expression with spaces to a PythonScript argument?

[Simon Bayling]

Hello,
    How do you convert the spaces in a TALES expression?

e.g.

<td tal:content="repeat_object/person id">placeholder</td>

to

<td
tal:content="python:container.script_id_converter(repeat_object.??)">pla
ceholder</td>

At the moment I'm using

<td tal:define="tmp repeat_object/person id"
tal:content="python:container.script_id_converter(tmp)">placeholder</td>

but there must be a nicer way than that (probably a common one I've
missed seeing in the Zope Book somewhere)

Cheers,
Simon Bayling