Protobuf Reader

A class for reading Protobuf data from a DataFile.

class bosdyn.bddf.protobuf_reader.ProtobufReader(data_reader)

Bases: object

A class for reading Protobuf data from a DataFile.

Methods raise ParseError if there is a problem with the format of the file.

property data_reader

Return underlying DataReader this object is using.

series_index(channel_name)

Return the series index (int) by which SeriesDescriptors and messages can be accessed.

Parameters

channel_name – name of the channel of messages.

series_index_to_descriptor(series_index)

Given a series index, return the associated SeriesDescriptor

Parameters

series_index – index (int) from the series_index() call

get_message(series_index, protobuf_type, index_in_series)

Return a deserialized protobuf from bytes stored in the file.

Parameters

• series_index – index (int) from the series_index() call

• protobuf_type – class of the protobuf we want to deserialize

• index_in_series – the index of the message within the series

Returns: DataTypeDescriptor for channel, timestamp_nsec (int), deserialized protobuf object