Get Form from string?

get the model by string i use:

from django.db.models.loading import get_model

def get_model(self, app_label, model_name, seed_cache=True):

how to get ModelForm by string?

i try used:

modelforms = forms.ModelForm.__subclasses__()

def get_form(form):

    try:

        for model_form in modelforms:

            try:

                if model_form.Meta.form == form:

                    return model_form

            except AttributeError:

                continue

    except IndexError:

        print "Does not exist Model Forms for the object"

but I must import the form in which I will seek appropriate by name!

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