How to make form handler of checkbox, Python, Django

I have a problem: I want to make checkboxes of each line of table:

<form action="" method="post">
    {% csrf_token %}
    <table>
        <thead>
            <tr>
                <th>cb</th>
                <th width="150">first_col</th>
                <th>sec_col</th>
                <th width="150">third_col</th>
            </tr>
        </thead>
        <tbody>
{% for i in list %}
<tr>
    <td><input type="checkbox" name="choices" value="{{i.id}}"></td>
    <td>{{ i.created_date}}</td>
    <td><a href="/{{i}}/"> {{ host }}/{{i}}/ </a></td>
    <td>{{i.number_of_clicks}}</td>
</tr>
{% endfor %}
         </tbody>
         </table>
    <button type="submit" name="delete" class="button">Del</button>
</form>

And in the def I make next in order to check if it works:

if 'delete' in request.POST:
    for item in request.POST.getlist('choices'):
        print (item)

But it does not print anything... What do i do wrong? Or can you help me to write correct handler of checkboxes?