Run yapf to reformat Python code

src/python/grpcio_tests/tests/_loader.py

@@ -48,7 +48,8 @@ class Loader(object):
         # measure unnecessarily suffers)
         coverage_context = coverage.Coverage(data_suffix=True)
         coverage_context.start()
-        imported_modules = tuple(importlib.import_module(name) for name in names)
+        imported_modules = tuple(
+            importlib.import_module(name) for name in names)
         for imported_module in imported_modules:
             self.visit_module(imported_module)
         for imported_module in imported_modules:

src/python/grpcio_tests/tests/interop/methods.py

@@ -144,8 +144,8 @@ def _large_unary_common_behavior(stub, fill_username, fill_oauth_scope,
 def _empty_unary(stub):
     response = stub.EmptyCall(empty_pb2.Empty())
     if not isinstance(response, empty_pb2.Empty):
-        raise TypeError('response is of type "%s", not empty_pb2.Empty!' %
+        raise TypeError(
-                        type(response))
+            'response is of type "%s", not empty_pb2.Empty!' % type(response))
 
 
 def _large_unary(stub):