我正在嘗試創(chuàng)建一個數(shù)據(jù)流模板，該模板將輸入?yún)?shù)作為.遵循文檔中的示例RuntimeValueimport reimport apache_beam as beamfrom apache_beam.io import ReadFromTextfrom apache_beam.io import WriteToTextfrom apache_beam.options.pipeline_options import PipelineOptions# [START example_wordcount_templated]class WordcountTemplatedOptions(PipelineOptions):  @classmethod  def _add_argparse_args(cls, parser):    # Use add_value_provider_argument for arguments to be templatable    # Use add_argument as usual for non-templatable arguments    parser.add_value_provider_argument(        '--input', help='Path of the file to read from')    parser.add_argument(        '--output', required=True, help='Output file to write results to.')pipeline_options = PipelineOptions(['--output', 'some/output_path'])with beam.Pipeline(options=pipeline_options) as p:  wordcount_options = pipeline_options.view_as(WordcountTemplatedOptions)  lines = p | 'Read' >> ReadFromText(wordcount_options.input)# [END example_wordcount_templated]（直接取自官方代碼段）在嘗試使用以下命令創(chuàng)建模板時（填寫詳細信息）時會出現(xiàn)以下錯誤： python -m examples.mymodule \    --runner DataflowRunner \    --project YOUR_PROJECT_ID \    --staging_location gs://YOUR_BUCKET_NAME/staging \    --temp_location gs://YOUR_BUCKET_NAME/temp \    --template_location gs://YOUR_BUCKET_NAME/templates/YOUR_TEMPLATE_NAME  File "lib/python3.7/site-packages/apache_beam/options/value_provider.py", line 139, in _f                                                                  raise error.RuntimeValueProviderError('%s not accessible' % obj)apache_beam.error.RuntimeValueProviderError: RuntimeValueProvider(option: input, type: str, default_value: None) not accessible                                                                                                        文檔還指出：某些 I/O 連接器包含接受 ValueProvider 對象的方法。若要確定對 I/O 連接器及其方法的支持，請參閱連接器的 API 參考文檔。以下 I/O 連接器接受運行時參數(shù)：基于文件的 IO：textio、avroio、tfrecordio我不確定為什么示例代碼會給出錯誤。有人可以幫我嗎？對于它的價值，我正在使用：apache-beam = {extras = ["gcp"], version = "^2.19.0"}