Same python expression in a template line not translated

[JonDehn]

I have this code in a template:

                        <fieldset class="age-group-set">
                            <legend>Age Group:</legend>
                            <div tal:repeat="ag age_groups" tal:omit-tag="True">
                                <input form="entry_form" id="${ag.name}" name="age_group" type="radio"
                                       value="${ag.name}" ${ag.checked} >
                                <label for="${ag.name}">${ag.name}</label>
                            </div>
                        </fieldset>

"age_groups" is a list of Objects with attributes 'name' and 'checked'

Note that python variable "ag.name" appears in 4 places in the template, and the ag.checked variable once.

There are four entries in the "age_groups" list, "(Preschool, ' '), ('Child', ' '), ('Teen', ' ') and ('Adult', 'checked').

On Chrome (I have not tried on other browsers), I get this, where sometimes ${ag.name} is properly translated, and sometimes not (just left as "${ag.name}"

  | Age Group:   |     |   | Preschool   |     |     |   | Child   |     |     |   | Teen   |     |     |   | Adult   |     |   |  

I've tried several work-arounds, but nothing seems to get the proper translation. Is there something I'm missing?

[malthe]

I don't think you can have ${ag.checked} just like that, standalone. It should be checked="${ag.checked}".

If you run your app using CHAMELEON_CACHE=./some-dir and perhaps CHAMELEON_DEBUG=1 then you can figure out what's going on in the generated Python code.

[JonDehn]

Thanks for your quick reply.
The "checked" specification is correct as is, from my reading of the HTML documentation. It is a "Boolean Attribute", which I think means the presence of the worded 'checked' is taken to mean true (and it seems to work).

I'm on windows; I tried setting the CHAMLEON_CACHE environment variable to "C:\temp" following your suggestion. This results in an exception on the second time a template is used (which is where the original problem showed up):

File "C:\Users\JonDe\PycharmProjects\TabDataTableTest\fairOps\Lib\site-packages\chameleon\loader.py", line 212, in build
os.rename(fn, name)
FileExistsError: [WinError 183] Cannot create a file when that file already exists: 'c:\temp\_layout_6d06839ce8755075f5f936d55286068cd2dvtxur.tmp' -> 'c:\temp\_layout_6d06839ce8755075f5f936d55286068c.py'

• Expression: ""load: ../shared/_layout.htm"
• Filename: ... jects\fairOps\web_server\templates\entries\entry_form.pt
• Location: (line 2: col 21)
• Source: ... iv metal:use-macro="load: ../shared/_layout.html">
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

My main HTML template is "../shared/_layout.html", which has a slot for the template "entry_form.pt".
So it appears that the debug code is using the name of the shared_layout.html a second time (but that's just a wild guess on my part)