关于protobuf的问题

   $ conda update conda
   Traceback (most recent call last):
     File "/home/hok/anaconda2/bin/conda", line 6, in <module>
       sys.exit(conda.cli.main())
     File "/home/hok/anaconda2/lib/python2.7/site-packages/conda/cli/main.py", line 162, in main
       return conda_exception_handler(_main, *args)
     File "/home/hok/anaconda2/lib/python2.7/site-packages/conda/exceptions.py", line 630, in conda_exception_handler
       return handle_exception(e)
     File "/home/hok/anaconda2/lib/python2.7/site-packages/conda/exceptions.py", line 620, in handle_exception
       print_unexpected_error_message(e)
     File "/home/hok/anaconda2/lib/python2.7/site-packages/conda/exceptions.py", line 561, in print_unexpected_error_message
       from conda.base.context import context
     File "/home/hok/anaconda2/lib/python2.7/site-packages/conda/base/context.py", line 18, in <module>
       from .._vendor.auxlib.path import expand
     File "/home/hok/anaconda2/lib/python2.7/site-packages/conda/_vendor/auxlib/path.py", line 8, in <module>
       import pkg_resources
     File "/home/hok/anaconda2/lib/python2.7/site-packages/pkg_resources/__init__.py", line 72, in <module>
       import packaging.requirements
     File "/home/hok/anaconda2/lib/python2.7/site-packages/packaging/requirements.py", line 59, in <module>
       MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
   TypeError: __call__() takes exactly 2 arguments (1 given)

   pip install --upgrade   https://storage.googleapis.com/tensorflow/linux/cpu/protobuf-3.1.0-cp27-none-linux_x86_64.whl

   pip install setuptools==33.1.1