Add docstring

analysis/tasks/PostProcessing/Uncertainties.py

@@ -175,6 +175,8 @@ class MergeUncertainties(AnalysisTask):
 
 @inherits(ExcaliburConfig)
 class UnravelUncertainties(AnalysisTask):
+    """Unravelled uncertainties, only used when plotting by bin-index"""
+
     dataset = luigi.Parameter(default="data")  # overwrite default from ExcaliburConfig
     mc_dataset = luigi.EnumParameter(enum=DY_Sets, default=DY_Sets.DYJetsToLL_combined)
     input_weight = luigi.Parameter(default="weight")