code: def get_class(import_path=None):
      
      from django.core.exceptions import ImproperlyConfigured
      if import_path is None:
          raise ImproperlyConfigured('No class path specified.')
      try:
          dot = import_path.rindex('.')
      except ValueError:
          raise ImproperlyConfigured("%s isn't a module." % import_path)
      module, classname = import_path[:dot], import_path[dot+1:]
      try:
          mod = import_module(module)
      except ImportError as e:
          raise ImproperlyConfigured('Error importing module %s: "%s"' % (module, e))
      try:
          return getattr(mod, classname)
      except AttributeError:
          raise ImproperlyConfigured('Module "%s" does not define a "%s" class.' % (module, classname))
docs: Largely based on django.core.files.storage's get_storage_class