def get(self, argument_name, default_value='', allow_multiple=False):
    param_value = self.get_all(argument_name)
    if allow_multiple:
      return param_value
    else:
      if len(param_value) > 0:
        return param_value[0]
      else:
        return default_value
Save all changes and display a success url.
dataset/ETHPy150Open CollabQ/CollabQ/.google_appengine/google/appengine/ext/webapp/__init__.py/Request.get--crossover with--dataset/ETHPy150Open django-oscar/django-oscar/src/oscar/apps/dashboard/catalogue/views.py/ProductCreateUpdateView.forms_valid