code: def python_hello_world(dataset_url="file:///tmp/external_dataset"):
      # Reading data from the non-Petastorm Parquet via pure Python
      with make_batch_reader(
          dataset_url, schema_fields=["id", "value1", "value2"]
      ) as reader:
          for schema_view in reader:
              # make_batch_reader() returns batches of rows instead of individual rows
              print(
                  "Batched read:\nid: {0} value1: {1} value2: {2}".format(
                      schema_view.id,
                      schema_view.value1,
                      schema_view.value2,
                  )
              )
  
label_desc: Use image node_id 1 for calling a global function with example usage: python_hello_world(dataset_url) without return types