Tensorflow protobuf版本报错问题解决(AttributeError: 'module' object has no attribute 'Default')

无意中发现TF跑不了，报的错误是：

AttributeError: 'module' object has no attribute 'Default'

如下：

>>> import tensorflow as tfTraceback (most recent call last):  File "<stdin>", line 1, in <module>  File "/home/schidester/usr/tf/local/lib/python2.7/site-packages/tensorflow/__init__.py", line 24, in <module>    from tensorflow.python import *  File "/home/schidester/usr/tf/local/lib/python2.7/site-packages/tensorflow/python/__init__.py", line 75, in <module>    from tensorflow.core.framework.graph_pb2 import *  File "/home/schidester/usr/tf/local/lib/python2.7/site-packages/tensorflow/core/framework/graph_pb2.py", line 9, in <module>    from google.protobuf import symbol_database as _symbol_database  File "/usr/local/lib/python2.7/dist-packages/google/protobuf/symbol_database.py", line 165, in <module>    _DEFAULT = SymbolDatabase(pool=descriptor_pool.Default())AttributeError: 'module' object has no attribute 'Default'
关于这个问题，网上有各种解决方案，但是始终不对。
如pip install --upgrade protobuf等这种办法，发现这样操作之后仍旧是无效。
后来进到/usr/loca/lib/python3.6/site-packages/中才发现，里面的protobuf版本有3.2，3.4等多个版本。
没有办法，只好去看https://github.com/tensorflow/tensorflow/releases中关于protobuf的相关说明，才发现里面需要用到的tf对应的protobuf版本是3.0.0b2，
https://pypi.python.org/pypi/protobuf/3.0.0b2，从这个网站上进行下载WHL文件，再进行安装，果然顺利成功。解决该问题。