Django Forms Filed for Multiple choice with number field for each choice

multiple_choice_with_number.py

class CheckboxChoiceWithNumberInput(forms.widgets.CheckboxChoiceInput):
    def render(self, name=None, value=None, attrs=None, choices=()):
        if self.id_for_label:
            label_for = format_html(u' for="{0}"', self.id_for_label)
        else:
            label_for = u''
        return format_html(u'{1}<label{0}> {2}</label> <input type="number" value="0" name="{3}_number[{4}]"/>', label_for, self.tag(), self.choice_label, self.name, self.choice_value)


class CheckboxWithNumberFieldRenderer(forms.widgets.CheckboxFieldRenderer):
    choice_input_class = CheckboxChoiceWithNumberInput


class CheckboxSelectMultipleWithNumber(forms.widgets.CheckboxSelectMultiple):
    renderer = CheckboxWithNumberFieldRenderer
    _empty_value = []

    def get_html_input_dict(self, query_dict, param):
        import re
        dictionary = {}
        regex = re.compile('%s\[([\w\d_]+)\]' % param)
        for key, value in query_dict.items():
            match = regex.match(key)
            if match:
                inner_key = match.group(1)
                dictionary[inner_key] = value

        return dictionary

    def value_from_datadict(self, data, files, name):
        values = super(CheckboxSelectMultipleWithNumber, self).value_from_datadict(data, files, name)
        numbers = self.get_html_input_dict(data, u"%s_number" % name)
        values_with_numbers = {}
        for value in values:
            values_with_numbers[value] = int(numbers[value])
        return values_with_numbers


class MultipleChoiceWithNumberField(forms.MultipleChoiceField):
    widget = CheckboxSelectMultipleWithNumber

    def to_python(self, value):
        if not value:
            return {}
        elif not isinstance(value, dict):
            raise forms.ValidationError("Enter a valid dict", code='invalid_dict')
        return value

#------------------------------------------------------        
# Usage: 

options = (
    ('22', 'IBM22'),
    ('1', 'IBM2'),
    ('2', 'IBM3'),
    ('3', 'IBM4'),
    ('4', 'IBM5'),
    ('5', 'IBM6'),
)

class MyForm(forms.Form):
    models = MultipleChoiceWithNumberField(choices=options)
    
#------------------------------------------------------        
# After validating form:

if form.is_valid():
    models = form.cleaned_data["models"]
    
# you will get dict with selected values and numbers for each them
{u'22': 100, u'4': 120, u'5': 222}