Fix various mind-numbing typos
diff --git a/src/python/grpcio/grpc/_channel.py b/src/python/grpcio/grpc/_channel.py
index a65ddfc..6a71ef2 100644
--- a/src/python/grpcio/grpc/_channel.py
+++ b/src/python/grpcio/grpc/_channel.py
@@ -25,7 +25,7 @@
from grpc.framework.foundation import callable_util
_LOGGER = logging.getLogger(__name__)
-_LOGGER.addHandler(logging.NullHandler)
+_LOGGER.addHandler(logging.NullHandler())
_USER_AGENT = 'grpc-python/{}'.format(_grpcio_metadata.__version__)
diff --git a/src/python/grpcio/grpc/framework/foundation/stream_util.py b/src/python/grpcio/grpc/framework/foundation/stream_util.py
index df8c93d..e03130c 100644
--- a/src/python/grpcio/grpc/framework/foundation/stream_util.py
+++ b/src/python/grpcio/grpc/framework/foundation/stream_util.py
@@ -20,7 +20,7 @@
_NO_VALUE = object()
_LOGGER = logging.getLogger(__name__)
-_LOGGER.addHandler(NullHandler())
+_LOGGER.addHandler(logging.NullHandler())
class TransformingConsumer(stream.Consumer):
diff --git a/src/python/grpcio_tests/tests/unit/_api_test.py b/src/python/grpcio_tests/tests/unit/_api_test.py
index 5dfb8b2..3807286 100644
--- a/src/python/grpcio_tests/tests/unit/_api_test.py
+++ b/src/python/grpcio_tests/tests/unit/_api_test.py
@@ -14,6 +14,7 @@
"""Test of gRPC Python's application-layer API."""
import unittest
+import logging
import six
diff --git a/src/python/grpcio_tests/tests/unit/_auth_context_test.py b/src/python/grpcio_tests/tests/unit/_auth_context_test.py
index 67f222d..b1b5bbd 100644
--- a/src/python/grpcio_tests/tests/unit/_auth_context_test.py
+++ b/src/python/grpcio_tests/tests/unit/_auth_context_test.py
@@ -15,6 +15,7 @@
import pickle
import unittest
+import logging
import grpc
from grpc import _channel
diff --git a/src/python/grpcio_tests/tests/unit/_auth_test.py b/src/python/grpcio_tests/tests/unit/_auth_test.py
index e125e77..d9df2ad 100644
--- a/src/python/grpcio_tests/tests/unit/_auth_test.py
+++ b/src/python/grpcio_tests/tests/unit/_auth_test.py
@@ -16,6 +16,7 @@
import collections
import threading
import unittest
+import logging
from grpc import _auth
