# For a specific version:
!pip install tensorflow-gpu==1.5.0rc0

# To determine which version you're using:
!pip show tensorflow-gpu

# For the current version: 
!pip install --upgrade tensorflow-gpu

# For the latest nightly build:
!pip install tf-nightly-gpu
!pip install -U tensorflow-gpu
!pip install -U keras

!pip install opencv-contrib-python --upgrade

!pip install -U libarchive

!pip install -U pydot graphviz

!pip install -U xgboost

import tensorflow as tf

tf.keras   # Keras 为 TensorFlow 提供了 API