class_docstr: Base class for Amazon first-party Estimator implementations.
  
  This class isn't intended to be instantiated directly.
class_docstr_tok: ["Base","class","for","Amazon","first-party","Estimator","implementations",".","This","class","is","n't","intended","to","be","instantiated","directly","."]
docstr: Placeholder docstring
code: def hyperparameters(self):
      """Placeholder docstring"""
      return hp.serialize_all(self)
  
imports: from __future__ import absolute_import
  import json
  import logging
  import tempfile
  from typing import Union, Optional, Dict
  from six.moves.urllib.parse import urlparse
  from sagemaker import image_uris, s3_utils
  from sagemaker.amazon import validation
  from sagemaker.amazon.hyperparameter import Hyperparameter
  from sagemaker.amazon.common import write_numpy_to_dense_tensor
  from sagemaker.deprecations import renamed_warning
  from sagemaker.estimator import EstimatorBase, _TrainingJob
  from sagemaker.inputs import FileSystemInput, TrainingInput
  from sagemaker.utils import sagemaker_timestamp, check_and_get_run_experiment_config
  from sagemaker.workflow.entities import PipelineVariable
  from sagemaker.workflow.pipeline_context import runnable_by_pipeline
  from sagemaker.workflow import is_pipeline_variable
label_desc: Use image node_id 3 for calling the AmazonAlgorithmEstimatorBase obj's underlying member method code with example usage: obj.hyperparameters() and returns: hp