diff --git a/popv/preprocessing.py b/popv/preprocessing.py
index 07cddf7..0be89de 100644
--- a/popv/preprocessing.py
+++ b/popv/preprocessing.py
@@ -13,6 +13,7 @@
 
 
 class Process_Query:
+    'Class to preprocess AnnData for PopV.'
     def __init__(
         self,
         query_adata: anndata.AnnData,
@@ -204,7 +205,7 @@ def __init__(
             except FileNotFoundError:
                 raise FileNotFoundError(
                     f"{self.cl_obo_file} doesn't exist. Check that folder exists."
-                )
+                ) from FileNotFoundError
 
         self.check_validity_anndata(self.query_adata, "query")
         self.setup_dataset(self.query_adata, "query", add_meta="_query")
diff --git a/popv/reproducibility/_accuracy.py b/popv/reproducibility/_accuracy.py
index 3f519d3..081395b 100644
--- a/popv/reproducibility/_accuracy.py
+++ b/popv/reproducibility/_accuracy.py
@@ -37,9 +37,7 @@ def match_type(n1, n2):
 
 
 def _fine_ontology_sibling_accuracy(adata, obofile, pred_key, gt_key, save_key=None):
-    """
-    Calculates the fine ontology accuracy and also determines the distance to siblings
-    """
+    "Calculates the fine ontology accuracy and also determines the distance to siblings"
     if save_key is None:
         save_key = pred_key + "_ontology_distance"
     adata.obs[save_key] = None