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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_form(self, request, obj=None, **kwargs):
 """ Provides a flexible way to get the right form according to the context For the add view it checks whether the app_config is set; if not, a special form to select the namespace is shown, which is reloaded after namespace selection. If only one namespace exists, the current is selected and the normal form is used. """

        form = super(ModelAppHookConfig, self).get_form(request, obj, **kwargs)
        if self.app_config_attribute not in form.base_fields:
            return form
        app_config_default = self._app_config_select(request, obj)
        if app_config_default:
            form.base_fields[self.app_config_attribute].initial = app_config_default
            get = copy.copy(request.GET)
            get[self.app_config_attribute] = app_config_default.pk
            request.GET = get
        elif app_config_default is None and request.method == 'GET':
            class InitialForm(form):
                class Meta(form.Meta):
                    fields = (self.app_config_attribute,)
            form = InitialForm
        form = self._set_config_defaults(request, form, obj)
        return form