最近tensorflow正式升级为tensorflow2.0版本，体验一下，结果安装报错：
错误：
ERROR: Cannot uninstall ‘wrapt’. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall.
解决方式：
pip install -U --ignore-installed wrapt enum34 simplejson netaddr
如果还有其他的错误，说某些包的版本问题，按照提示的版本重新安装即可！！！
Good luck !
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