Revert "fix python lint"

This reverts commit 7af662e.

python/pyarrow/parquet/__init__.py

@@ -109,13 +109,13 @@ def _check_filters(filters, check_null_strings=True):
     return filters
 
 
-_DNF_filter_doc = """Predicates are expressed in disjunctive normal form (DNF),
-    like ``[[('x', '=', 0), ...], ...]``. DNF allows arbitrary boolean logical
+_DNF_filter_doc = """Predicates are expressed in disjunctive normal form (DNF), like
+    ``[[('x', '=', 0), ...], ...]``. DNF allows arbitrary boolean logical
     combinations of single column predicates. The innermost tuples each
     describe a single column predicate. The list of inner predicates is
-    interpreted as a conjunction (AND), forming a more selective and multiple
-    column predicate. Finally, the most outer list combines these filters as a
-    disjunction (OR).
+    interpreted as a conjunction (AND), forming a more selective and
+    multiple column predicate. Finally, the most outer list combines these
+    filters as a disjunction (OR).
 
     Predicates may also be passed as List[Tuple]. This form is interpreted
     as a single conjunction. To express OR in predicates, one must

python/pyarrow/tests/parquet/encryption.py

@@ -20,8 +20,7 @@
 
 
 class InMemoryKmsClient(pe.KmsClient):
-    """This is a mock class implementation of KmsClient, built for testing
-    only.
+    """This is a mock class implementation of KmsClient, built for testing only.
     """
 
     def __init__(self, config):

python/pyarrow/tests/test_ipc.py

@@ -848,8 +848,8 @@ def run(self):
             connection.close()
 
     def get_result(self):
-        return (self._schema, self._table if self._do_read_all
-                else self._batches)
+        return(self._schema, self._table if self._do_read_all
+               else self._batches)
 
 
 class SocketStreamFixture(IpcFixture):