python 2.7.6 typeerror中的tensorflow导入错误：__ call __（）需要2个参数（给定1个）

Question

(tensorflow)gnl@gnl-VPCEA46FG:~$ python
Python 2.7.6 (default, Oct 26 2016, 20:30:19) 
[GCC 4.8.4] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import tensorflow as tf
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/gnl/tensorflow/local/lib/python2.7/site-packages/tensorflow/__init__.py", line 24, in <module>
    from tensorflow.python import *
  File "/home/gnl/tensorflow/local/lib/python2.7/site-packages/tensorflow/python/__init__.py", line 54, in <module>
    from tensorflow.core.framework.graph_pb2 import *
  File "/home/gnl/tensorflow/local/lib/python2.7/site-packages/tensorflow/core/framework/graph_pb2.py", line 6, in <module>
    from google.protobuf import descriptor as _descriptor
  File "/home/gnl/tensorflow/local/lib/python2.7/site-packages/google/protobuf/__init__.py", line 37, in <module>
    __import__('pkg_resources').declare_namespace(__name__)
  File "/home/gnl/tensorflow/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 72, in <module>
    import packaging.requirements
  File "/usr/local/lib/python2.7/dist-packages/packaging/requirements.py", line 59, in <module>
    MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
TypeError: __call__() takes exactly 2 arguments (1 given)

如何解决此错误？ 已经尝试使用pip进行安装并在那里获得相同的错误。