Django-Python getting value from checkbox

I read all these topics:

How do I get multiple values from checkboxes in Django

How do I get the values of all selected checkboxes in a Django request.POST?

Get the values of multiple checkboxes in django

I implemented a code, but still it doesnt work correctly. So I need to get value of checkbox where it was selected. My code:

VIEW

def get_context_data(self, **kwargs):
        .......
        context['checkedd'] = self.request.POST.getlist('checks[]')

        return context

HTML:

<button class="btn btn-default" onclick="myFunction()">
                                <span class="glyphicon"></span> Get checked values
                            </button>
....
<td> <input type="checkbox" name="checks[]" value='{{ i.id }}'> </td>
....
<script>
    function myFunction() {
        alert({{ checkedd }});
    }
    </script>

Im trying to print out/ make an alert message of selected values, but the answer is empty. Please help a noob.