版本：
python3.5
Anaconda 4.2.0
tensorflow2.0 cpu版本
1、安裝命令
pip3 install tensorflow==2.0.0.0a0 -i https://pypi.tuna.tsinghua.edu.cn/simple/ # -i表示重新指定鏡像，提高下載速度
2、報錯以及解決方法
（1）報錯： “Cannot remove entries from nonexistent file c:\program files\anaconda3\lib\site-packages\easy-install.pth”
解決方案：
pip install --upgrade --ignore-installed setuptools
（2）報錯：“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”、、
解決方案：
pip3 install --ignore-installed Werkzeug tensorflow==2.0.0.0a0 -i https://pypi.tuna.tsinghua.edu.cn/simple/
3、成功安裝后 import tensorflow as tf 報警：“ 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 的版本過低或者過高都會出現警告
解決方案：
# 需要先卸載現有的numpy，並重新指定1.16.4版本的numpy pip3 uninstall numpy pip3 install numpy==1.16.4 -i https://pypi.tuna.tsinghua.edu.cn/simple/
# 如果還有部分報警，最后絕招
pip install h5py==2.8.0rc1