anaconda3.7
pip install tensorflow==2.0.0 -i https://pypi.tuna.tsinghua.edu.cn/simple
测试：
import tensorflow as tf
version = tf.__version__
gpu_ok = tf.test.is_gpu_available()
print("tf version:",version,"\nif use GPU",gpu_ok)
"""
tf version: 2.0.0
if use GPU False
"""
