版本信息
python version: Python 2.7.15
tensorFlow version: tensorFlow 1.12.0

运行代码：
import tensorflow

报错提示：
Traceback (most recent call last):
File “”, line 1, in
File “/Users/tangchao/Library/Python/2.7/lib/python/site-packages/tensorflow/init.py”, line 24, in
from tensorflow.python import pywrap_tensorflow # pylint: disable=unused-import
File “/Users/tangchao/Library/Python/2.7/lib/python/site-packages/tensorflow/python/init.py”, line 127, in
from tensorflow.python.platform import test
File “/Users/tangchao/Library/Python/2.7/lib/python/site-packages/tensorflow/python/platform/test.py”, line 47, in
import mock # pylint: disable=g-import-not-at-top,unused-import
File “/Users/tangchao/Library/Python/2.7/lib/python/site-packages/mock/init.py”, line 2, in
import mock.mock as _mock
File “/Users/tangchao/Library/Python/2.7/lib/python/site-packages/mock/mock.py”, line 71, in
_v = VersionInfo(‘mock’).semantic_version()
File “/Users/tangchao/Library/Python/2.7/lib/python/site-packages/pbr/version.py”, line 462, in semantic_version
self._semantic = self._get_version_from_pkg_resources()
File “/Users/tangchao/Library/Python/2.7/lib/python/site-packages/pbr/version.py”, line 439, in _get_version_from_pkg_resources
import pkg_resources
ImportError: No module named pkg_resources

报错截图：