text: #!/usr/bin/python
  #
  # Copyright 2018-2021 Polyaxon, Inc.
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #      http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  from marshmallow import ValidationError, fields, validate
  from marshmallow.base import FieldABC
  
  
  def get_obj_or_list_obj(container, value, min_length=None, max_length=None):
      try:
          return container.deserialize(value)
      except (ValueError, TypeError, ValidationError):
          pass
  
      if not isinstance(value, (list, tuple)):
          raise ValidationError(
              "This field expects an {container} or a list of {container}s.".format(
                  container=container.__class__.__name__
              )
          )
  
      value = validate.Length(min=min_length, max=max_length)(value)
      try:
          return [container.deserialize(v) for v in value]
      except (ValueError, TypeError):
          raise ValidationError(
              "This field expects an {container} or a list of {container}s.".format(
                  container=container.__class__.__name__
              )
          )
  
  
  class ObjectOrListObject(fields.Field):
      def __init__(self, cls_or_instance, min=None, max=None, **kwargs):  # noqa
          self.min = min
          self.max = max
  
          super().__init__(**kwargs)
          if isinstance(cls_or_instance, type):
              if not issubclass(cls_or_instance, FieldABC):
                  raise ValueError(
                      "The type of the list elements "
                      "must be a subclass of "
                      "marshmallow.base.FieldABC"
                  )
              self.container = cls_or_instance()
          else:
              if not isinstance(cls_or_instance, FieldABC):
                  raise ValueError(
                      "The instances of the list "
                      "elements must be of type "
                      "marshmallow.base.FieldABC"
                  )
              self.container = cls_or_instance
  
      def _deserialize(self, value, attr, data, **kwargs):
          return get_obj_or_list_obj(self.container, value, self.min, self.max)
  