def _preprocess(urls):
    return urls
Reads object from potentially-nested encoding in stream.
dataset/ETHPy150Open mekarpeles/waltz/waltz/setup.py/_preprocess--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/DataflowPythonSDK/google/cloud/dataflow/coders/coder_impl.py/CoderImpl.decode_from_stream