${} operator to expand attributes not working

[thet]

I tried this:

<label class="a b c ${wrapper_css_classes}" ${wrapper_attributes}>
...
</label>

But got the following error.

It would be really handy if I could just insert random attributes with the ${} variable expansion mechanism.

2022-04-14 13:20:27,243 ERROR   [Zope.SiteErrorLog:17][waitress-1] 1649935174.23567870.8504706171438358 http://localhost:8080/Plone/@@panel-users
Traceback (innermost last):
  Module ZPublisher.WSGIPublisher, line 162, in transaction_pubevents
  Module ZPublisher.WSGIPublisher, line 371, in publish_module
  Module ZPublisher.WSGIPublisher, line 266, in publish
  Module ZPublisher.mapply, line 85, in mapply
  Module Products.PDBDebugMode.wsgi_runcall, line 60, in pdb_runcall
  Module zope.browserpage.simpleviewclass, line 41, in __call__
  Module Products.Five.browser.pagetemplatefile, line 126, in __call__
  Module Products.Five.browser.pagetemplatefile, line 58, in __call__
  Module zope.pagetemplate.pagetemplate, line 133, in pt_render
  Module Products.PageTemplates.engine, line 378, in __call__
  Module z3c.pt.pagetemplate, line 176, in render
  Module chameleon.zpt.template, line 302, in render
  Module chameleon.template, line 215, in render
  Module chameleon.utils, line 53, in raise_with_traceback
  Module chameleon.template, line 192, in render
  Module 4a85de36c3c609b6b7cdb6d7d6d3b32a, line 323, in render
  Module zope.tales.expressions, line 250, in __call__
  Module Products.PageTemplates.Expressions, line 225, in _eval
  Module Products.PageTemplates.Expressions, line 155, in render
  Module zope.browserpage.simpleviewclass, line 41, in __call__
  Module Products.Five.browser.pagetemplatefile, line 126, in __call__
  Module Products.Five.browser.pagetemplatefile, line 58, in __call__
  Module zope.pagetemplate.pagetemplate, line 129, in pt_render
   - Warning: Compilation failed
   - Warning: chameleon.exc.ParseError: Unexpected end tag.

 - String:     "</label>"
 - Filename:   /home/_thet/data/dev/syslab/REPOS/quaivesaas.buildout/src/ploneintranet/src/ploneintranet/userprofile/browser/templates/principal_in_sidebar.pt
 - Location:   (line 42: col 2)
 - Source:     </label>
               ^^^^^^^^
zope.pagetemplate.pagetemplate.PTRuntimeError: zope.pagetemplate.pagetemplate.PTRuntimeError: ['Compilation failed', 'chameleon.exc.ParseError: Unexpected end tag.\n\n - String:     "</label>"\n - Filename:   /home/_thet/data/dev/syslab/REPOS/quaivesaas.buildout/src/ploneintranet/src/ploneintranet/userprofile/browser/templates/principal_in_sidebar.pt\n - Location:   (line 42: col 2)\n - Source:     </label>\n               ^^^^^^^^']

 - Expression: "it/@@principal-in-sidebar"
 - Filename:   ... ploneintranet/microblog/browser/templates/panel_users.pt
 - Location:   (line 24: col 44)
 - Source:     ... l replace="structure it/@@principal-in-sidebar" />
                                        ^^^^^^^^^^^^^^^^^^^^^^^^^
 - Arguments:  template: <Products.Five.browser.pagetemplatefile.ViewPageTemplateFile object at 0x7f9855bbb6d0>
               options: {}
               args: ()
               nothing: None
               modules: <Products.PageTemplates.ZRPythonExpr._SecureModuleImporter object at 0x7f986670d0d0>
               request: <WSGIRequest, URL=http://localhost:8080/Plone/@@panel-users>
               view: <Products.Five.browser.metaconfigure.SimpleViewClass from /home/_thet/data/dev/syslab/REPOS/quaivesaas.buildout/src/ploneintranet/src/ploneintranet/microblog/browser/templates/panel_users.pt object at 0x7f9855ad0c10>
               context: <PloneSite at /Plone>
               views: <Products.Five.browser.pagetemplatefile.ViewMapper object at 0x7f9855ad0700>
               here: <PloneSite at /Plone>
               container: <PloneSite at /Plone>
               root: <Application at >
               traverse_subpath: []
               user: <PropertiedUser 'admin'>
               default: <DEFAULT>
               repeat: <Products.PageTemplates.engine.RepeatDictWrapper object at 0x7f9858f87840>
               loop: {'it': <Products.PageTemplates.engine.RepeatItem object at 0x7f9855ae7f10>}
               target_language: None
               translate: <function BaseTemplate.render.<locals>.translate at 0x7f9855a6d8b0>
               attrs: {}
               proto: <Products.Five.browser.metaconfigure.ProtoView object at 0x7f9855aa9cd0>
               it: {'description': '', 'getId': 'Plone', 'getURL': <function Users.result.<locals>.<lambda> at 0x7f9855a16b80>, 'has_thumbs': None, 'num_users': 123, 'portal_type': 'ploneintranet.userprofile.workgroup', 'Title': 'Workspace', 'title': 'Workspace', 'wrapper_css_classes': 'tiptap-item disable-patterns', 'wrapper_attributes': 'data-tiptap-value="Workspace"'}
[22] > /home/_thet/repos-config/dotfiles-thet/dot.buildout/eggs/zope.pagetemplate-4.5.0-py3.9.egg/zope/pagetemplate/pagetemplate.py(129)pt_render()
-> raise PTRuntimeError(str(self._v_errors))
(Pdb++) c

[malthe]

But you can! Use tal:attributes="wrapper_attributes".

Something like that should work. It'll understand that it's a dict.

[thet]

Oh, how nice. Thanks for the quick answer!
I'll close this issue then.