How can I modify a widget's attributes in a ModelForm's __init__() method?

Question

I want to programatically modify the widget attributes of a field in a Django ModelForm's init() method. Thus far, I've tried the following

def __init__(self, *args, **kwargs):
    super(MyForm, self).__init__(*args, **kwargs)
    self.fields['my_checkbox'].widget_attrs(forms.CheckboxInput(attrs={'onclick':'return false;'}))

Unfortunately, this does not work. Any thoughts?

Answer 1

def __init__(self, *args, **kwargs):
    super(MyForm, self).__init__(*args, **kwargs)
    self.fields['my_checkbox'].widget.attrs={'onclick':'return false;'}