ess.snspowder.powgen.data.source_position# ess.snspowder.powgen.data.source_position(dg)[source]# Return the source position from a loaded data group. Return type: Position[NXsource, TypeVar(RunType, ess.reduce.nexus.types.SampleRun (int), ess.reduce.nexus.types.VanadiumRun (int), ess.powder.types.EmptyCanRun (int))]