Python + chameleon - select block output?

Question

Template Engines

I use chameleon template engine. I can’t figure out how to make an active item in the block.

Here is the code I have:

<select class="form-select" name="timezone" required>
                      <option tal:repeat="item range(-12, 13)" value="${ item }">${ item }</option>
                  </select>

Here I have a dropdown list, the parameter is also passed, what is the timezone, how can I add the selected attribute depending on what the passed parameter is equal to?