Adopt reviewer's advices

src/python/grpcio_tests/tests/BUILD.bazel

@@ -1,8 +1,8 @@
 py_library(
-    name = "bazel_patch",
-    srcs = ["bazel_patch.py"],
-    visibility = ["//visibility:public"],
-    data=[
-        "//src/python/grpcio_tests/tests/unit/credentials",
+    name = "bazel_namespace_package_hack",
+    srcs = ["bazel_namespace_package_hack.py"],
+    visibility = [
+        "//src/python/grpcio_tests/tests/status:__subpackages__",
+        "//src/python/grpcio_tests/tests/interop:__subpackages__",
     ],
 )

src/python/grpcio_tests/tests/bazel_namespace_package_hack.py

@@ -22,7 +22,7 @@ import sys
 # Python process to parse the .pth file in the sys.path to resolve namespace
 # package in the right place.
 # Analysis in depth: https://github.com/bazelbuild/rules_python/issues/55
-def bazel_patch():
+def sys_path_to_site_dir_hack():
     """Add valid sys.path item to site directory to parse the .pth files."""
     for item in sys.path:
         if os.path.exists(item):

src/python/grpcio_tests/tests/interop/BUILD.bazel

@@ -29,7 +29,7 @@ py_library(
     srcs = ["methods.py"],
     deps = [
         "//src/python/grpcio/grpc:grpcio",
-        "//src/python/grpcio_tests/tests:bazel_patch",
+        "//src/python/grpcio_tests/tests:bazel_namespace_package_hack",
         "//src/proto/grpc/testing:py_empty_proto",
         "//src/proto/grpc/testing:py_messages_proto",
         "//src/proto/grpc/testing:py_test_proto",

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

@@ -13,8 +13,8 @@
 # limitations under the License.
 """Implementations of interoperability test methods."""
 
-from tests.bazel_patch import bazel_patch
-bazel_patch()
+from tests import bazel_namespace_package_hack
+bazel_namespace_package_hack.sys_path_to_site_dir_hack()
 
 import enum
 import json

src/python/grpcio_tests/tests/status/BUILD.bazel

@@ -10,7 +10,7 @@ py_test(
     deps = [
         "//src/python/grpcio/grpc:grpcio",
         "//src/python/grpcio_status/grpc_status:grpc_status",
-        "//src/python/grpcio_tests/tests:bazel_patch",
+        "//src/python/grpcio_tests/tests:bazel_namespace_package_hack",
         "//src/python/grpcio_tests/tests/unit:test_common",
         "//src/python/grpcio_tests/tests/unit/framework/common:common",
         requirement('protobuf'),

src/python/grpcio_tests/tests/status/_grpc_status_test.py

@@ -13,8 +13,8 @@
 # limitations under the License.
 """Tests of grpc_status."""
 
-from tests.bazel_patch import bazel_patch
-bazel_patch()
+from tests import bazel_namespace_package_hack
+bazel_namespace_package_hack.sys_path_to_site_dir_hack()
 
 import unittest