diff --git a/lib/galaxy/datatypes/genetics.py b/lib/galaxy/datatypes/genetics.py
index a17ee92c9b08..1ce24261aebf 100644
--- a/lib/galaxy/datatypes/genetics.py
+++ b/lib/galaxy/datatypes/genetics.py
@@ -863,16 +863,15 @@ def set_meta(self, dataset: DatasetProtocol, overwrite: bool = True, **kwd) -> N
         pp = os.path.join(dataset.extra_files_path, pn)
         dataset.metadata.pheno_path = pp
         try:
-            with open(pp) as f:
-                pf = f.readlines()  # read the basename.phenodata in the extra_files_path
+            with open(pp) as file:
+                pf = file.readlines()  # read the basename.phenodata in the extra_files_path
         except Exception:
             pf = None
         if pf:
-            h = pf[0].strip()
-            h = h.split("\t")  # hope is header
-            h = [escape(x) for x in h]
-            dataset.metadata.column_names = h
-            dataset.metadata.columns = len(h)
+            header = pf[0].strip()
+            columns = [escape(x) for x in header.split("\t")]  # hope is header
+            dataset.metadata.column_names = columns
+            dataset.metadata.columns = len(columns)
             dataset.peek = "".join(pf[:5])
         else:
             dataset.metadata.column_names = []
diff --git a/lib/galaxy/datatypes/protocols.py b/lib/galaxy/datatypes/protocols.py
index ac4e3de166ca..4f5bd1593371 100644
--- a/lib/galaxy/datatypes/protocols.py
+++ b/lib/galaxy/datatypes/protocols.py
@@ -27,7 +27,7 @@ def ext(self): ...
 
 class HasExtraFilesPath(Protocol):
     @property
-    def extra_files_path(self): ...
+    def extra_files_path(self) -> str: ...
 
 
 class HasFileName(Protocol):