[web2py] How to use SELECT Tag (HTML HELP) to print out a list

[Dan]

Hi everyone,

Happy holidays first.

How do I use the the Web2Python HTML Helper "=SELECT" Tag to print out
a select with all contents in a list.
like following one

<select>
{{for i in ['a','b','c']:}}
<option>{{=i}} </option>
{{pass}}
</select>

Many thanks.