Prepend instead of appending external package directory to __path__. Resolves

#28027.

PiperOrigin-RevId: 244606979

tensorflow/api_template.__init__.py

@@ -55,20 +55,23 @@ elif _tf_api_dir not in __path__:
 # Hook external TensorFlow modules.
 try:
   from tensorboard.summary._tf import summary
-  _current_module.__path__.append(_module_util.get_parent_dir(summary))
+  _current_module.__path__ = (
+      [_module_util.get_parent_dir(summary)] + _current_module.__path__)
 except ImportError:
   _logging.warning(
       "Limited tf.summary API due to missing TensorBoard installation.")
 
 try:
   from tensorflow_estimator.python.estimator.api._v2 import estimator
-  _current_module.__path__.append(_module_util.get_parent_dir(estimator))
+  _current_module.__path__ = (
+      [_module_util.get_parent_dir(estimator)] + _current_module.__path__)
 except ImportError:
   pass
 
 try:
   from tensorflow.python.keras.api._v2 import keras
-  _current_module.__path__.append(_module_util.get_parent_dir(keras))
+  _current_module.__path__ = ([
+      _module_util.get_parent_dir(keras)] + _current_module.__path__)
 except ImportError:
   pass
 

tensorflow/api_template_v1.__init__.py

@@ -44,13 +44,15 @@ elif _tf_api_dir not in __path__:
 # Hook external TensorFlow modules.
 try:
   from tensorflow_estimator.python.estimator.api._v1 import estimator
-  _current_module.__path__.append(_module_util.get_parent_dir(estimator))
+  _current_module.__path__ = (
+      [_module_util.get_parent_dir(estimator)] + _current_module.__path__)
 except ImportError:
   pass
 
 try:
   from tensorflow.python.keras.api._v1 import keras
-  _current_module.__path__.append(_module_util.get_parent_dir(keras))
+  _current_module.__path__ = (
+      [_module_util.get_parent_dir(keras)] + _current_module.__path__)
 except ImportError:
   pass
 

tensorflow/compat_template.__init__.py

@@ -32,7 +32,8 @@ from tensorflow.python.tools import module_util as _module_util
 _current_module = _sys.modules[__name__]
 try:
   from tensorboard.summary._tf import summary
-  _current_module.__path__.append(_module_util.get_parent_dir(summary))
+  _current_module.__path__ = (
+      [_module_util.get_parent_dir(summary)] + _current_module.__path__)
 except ImportError:
   _logging.warning(
       "Limited tf.compat.v2.summary API due to missing TensorBoard "
@@ -40,13 +41,15 @@ except ImportError:
 
 try:
   from tensorflow_estimator.python.estimator.api._v2 import estimator
-  _current_module.__path__.append(_module_util.get_parent_dir(estimator))
+  _current_module.__path__ = (
+      [_module_util.get_parent_dir(estimator)] + _current_module.__path__)
 except ImportError:
   pass
 
 try:
   from tensorflow.python.keras.api._v2 import keras
-  _current_module.__path__.append(_module_util.get_parent_dir(keras))
+  _current_module.__path__ = (
+      [_module_util.get_parent_dir(keras)] + _current_module.__path__)
 except ImportError:
   pass
 

tensorflow/compat_template_v1.__init__.py

@@ -31,13 +31,15 @@ from tensorflow.python.tools import module_util as _module_util
 _current_module = _sys.modules[__name__]
 try:
   from tensorflow_estimator.python.estimator.api._v1 import estimator
-  _current_module.__path__.append(_module_util.get_parent_dir(estimator))
+  _current_module.__path__ = (
+      [_module_util.get_parent_dir(estimator)] + _current_module.__path__)
 except ImportError:
   pass
 
 try:
   from tensorflow.python.keras.api._v1 import keras
-  _current_module.__path__.append(_module_util.get_parent_dir(keras))
+  _current_module.__path__ = (
+      [_module_util.get_parent_dir(keras)] + _current_module.__path__)
 except ImportError:
   pass