Resubmission: Save output dataframe as HDF5, not Pickle #49
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Pandas does not like writing pickles to buffers.
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I was having issues with reading Pickles from a buffer — as updated in ee64193, in order to accommodate multiple backends, the output Pickle is now read via a transport, rather than with a simple
pd.read_pickle("filename")call.HDF5 is more amenable to being read/written via buffers, so I've switched over. Also, HDF5 ought to be a more stable serialization format — people have reported that the Pickle spec often introduces breaking changes.