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A Python module can use standard psana features to skip events as discussed above. It can also add any Python object into the event store that has the key "do_not_translate". This will create the Filtered:0000/time dataset as above. However to use the Translator filtering features that record user data, a the Python module will have to add data that psana knows how to convert for C++ modules. Presently the only types that a Python module can add to the event store which will be seen by C++ modules are a number of ndarrays. A Python module will need to add one of these ndarray types to filter events, the data of the ndarray will be recorded in the hdf5 file.

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