Setting up POST Data for Page with Select Tags with urllib

I’m trying to set up post data for a page that contains select options. I cannot find information on what to use for that data key. Here is the select tag:

<select id="TimeOfCallDropDownList" name="TimeOfCallDropDownList" tabindex="4"><option selected="selected" value="">Hour</option><option value="00">12:00 AM</option><option value="01">01:00 AM</option><option value="02">02:00 AM</option><option value="03">03:00 AM</option><option value="04">04:00 AM</option><option value="05">05:00 AM</option><option value="06">06:00 AM</option><option value="07">07:00 AM</option><option value="08">08:00 AM</option><option value="09">09:00 AM</option><option value="10">10:00 AM</option><option value="11">11:00 AM</option><option value="12">12:00 PM</option><option value="13">01:00 PM</option><option value="14">02:00 PM</option><option value="15">03:00 PM</option><option value="16">04:00 PM</option><option value="17">05:00 PM</option><option value="18">06:00 PM</option><option value="19">07:00 PM</option><option value="20">08:00 PM</option><option value="21">09:00 PM</option><option value="22">10:00 PM</option><option value="23">11:00 PM</option></select>

What do I set ‘TimeOfCallDropDownList’ to in my dictionary for a particular option (e.g. 03:00 PM).

TIA.