Morelia.Stream package

Subpackages

• Morelia.Stream.sink package
  • Submodules
  • Morelia.Stream.sink.csv_sink module
    • CSVSink
  • Morelia.Stream.sink.edf_sink module
    • EDFSink
  • Morelia.Stream.sink.influx_sink module
    • InfluxSink
      • InfluxSink.close()
      • InfluxSink.flush()
      • InfluxSink.open()
  • Morelia.Stream.sink.sink_interface module
    • SinkInterface
      • SinkInterface.flush()
  • Module contents

Submodules

Morelia.Stream.data_flow module

Stream data from multiple devices to multiple destinations. In technical terms, this module is used to create bipartite dataflow graphs from devices to data sinks.

class Morelia.Stream.data_flow.DataFlow(network)

Bases: object

Class that use multiprocessing to efficiently collect data from many devices at once.

Parameters:

• network (list[tuple[AquisitionDevice, list[SinkInterface]]]) – A mapping of data sources (POD devices) to one or more data sinks.

• filter_method – Method to use to clean curropted data. Defaults to TAKE_PAST.

• filter_insert_value – Value to insert when using the INSERT filter method. Defaults to NaN.

• fail_tolerance – How many times in a row to fail reading before giving up on reading a “chunk” of data (“chunk” here is approximately 1 second of samples). Defaults to 3.

collect()

Collect until stop_collection is called.

Return type:

None

collect_for_seconds(duration_sec)

Collect data for duration_sec seconds.

Parameters:

duration_sec (float) – How long to collect data for in seconds.

Return type:

None

stop_collection()

Stop collecting data.

Return type:

None

Morelia.Stream.source module

Functions for getting streaming data from a POD device using ReactiveX (RxPy).

Morelia.Stream.source.get_data(duration, manual_stop_event, pod, sinks)

Streams data from the POD device. The data drops about every 1 second. Streaming will continue until a “stop streaming” packet is recieved.

Parameters:

• duration (float) – How long to stream data for.

• manual_stop_event (Event) – Used to synchronize multiple get_data operations in a flowgraph. When a flowgraph is told to stop collecting, this event is set which stops the loop within the reactivex operator that is collecting data.

• pod (AquisitionDevice) – The device to collect data from.

Return type:

None

Module contents