Django Float Field input

Which is the best way to create a django form field that accepts floats and has the same functionality as a NumberInput? What I mean with same functionality is that django's NumberInput has arrows right next to the input that can increase or decrease the number and it also accepts min_value and max_value. If I use a TextInput widget I won't get this functionality. If I use NumberInput widget it wont work with floats:

homework = forms.FloatField(
    required=False, max_value=10, min_value=0, 
    widget=NumberInput(
        attrs={'id': 'form_homework'}
    )
)

It doesn't include floats (i.e 5.5) when I click the + - buttons. Also, it doesn't show the float at all if I want to set the actual float (the homework's grade) as an initial value (using Jquery).

Any advice is welcome.

EDIT:

If I do:

class NumberInput(TextInput):
    input_type = 'number'

homework = forms.FloatField(
    required=False, max_value=10, min_value=0,
    widget=NumberInput(
        attrs={'id': 'form_homework', 'step': '0.1'}
    )
)

The 'step' attribute works but the max_value/min_value doesn't. If I do not define NumberInput that way and use the regular NumberInput, it doesn't work at all.

You can do this by including NumberInput with your form widget and setting step attribute

homework = forms.FloatField(
    required=False, max_value=10, min_value=0, 
    widget=forms.NumberInput(
        attrs={'id': 'form_homework', 'step': "0.01"}
    )
) 

Difference from above answer is missing forms reference with NumberInput of form