Flake8 fixes

Author: roberthdevries

pandas/io/pytables.py

@@ -615,7 +615,8 @@ def keys(self, kind='pandas') -> List[str]:
 
         if kind == 'tables':
             self._check_if_open()
-            return [n._v_pathname for n in self._handle.walk_nodes('/', classname='Table')]
+            return [n._v_pathname
+                    for n in self._handle.walk_nodes('/', classname='Table')]
         raise ValueError(f"kind should be either pandas' or 'table' but is {kind}")
 
     def __iter__(self):

pandas/tests/io/pytables/test_store.py

@@ -302,10 +302,13 @@ def test_non_pandas_keys(self, setup_path):
 
         class Table1(tables.IsDescription):
             value1 = tables.Float32Col()
+
         class Table2(tables.IsDescription):
             value2 = tables.Float32Col()
+
         class Table3(tables.IsDescription):
             value3 = tables.Float32Col()
+
         with ensure_clean_path(setup_path) as path:
             with tables.open_file(path, mode="w") as h5file:
                 group = h5file.create_group("/", "group")