版本：
python3.5
Anaconda 4.2.0
tensorflow2.0 cpu版本
1、安装命令
pip3 install tensorflow==2.0.0.0a0 -i https://pypi.tuna.tsinghua.edu.cn/simple/ # -i表示重新指定镜像，提高下载速度
2、报错以及解决方法
（1）报错： “Cannot remove entries from nonexistent file c:program filesanaconda3libsite-packageseasy-install.pth”
解决方案：
pip install --upgrade --ignore-installed setuptools
（2）报错：“Cannot uninstall 'Werkzeug'. 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”、、
解决方案：
pip3 install --ignore-installed Werkzeug tensorflow==2.0.0.0a0 -i https://pypi.tuna.tsinghua.edu.cn/simple/
3、成功安装后 import tensorflow as tf 报警：“ FutureWarning: Passing (type, 1) or '1type' as a synonym of type is deprecated; in a future version of numpy, it will be understood as (type, (1,)) / '(1,)type'”
原因：numpy 的版本过低或者过高都会出现警告
解决方案：
# 需要先卸载现有的numpy，并重新指定1.16.4版本的numpy pip3 uninstall numpy pip3 install numpy==1.16.4 -i https://pypi.tuna.tsinghua.edu.cn/simple/
# 如果还有部分报警，最后绝招
pip install h5py==2.8.0rc1