Django metaview experiment

metaviews.py

def edit_model(cls, get_dict, update_keys, update_dict_eval):
    def _edit_model_view(request):
        instance = get_object_or_404(cls, **get_dict)
        model_name = cls_to_name(cls)
        ModelForm = eval(model_name + 'Form')

        if request.method == 'POST':
            form = ModelForm(request.POST, request.FILES)
            if form.is_valid():
                updated_instance = cls()
                for key in update_keys:
                    try:
                        updated_instance.update(**{
                            key: form.cleaned_data.get(key) or eval(key)
                        })
                    except:
                        continue

                updated_instance.update(**{k: eval(v) for k, v in update_dict_eval})
                updated_instance.save()
        else:
            form = ModelForm(instance=instance)

        return render(request, "edit_" + model_name + ".html", locals())
    return _edit_model_view