我是否成功安装了 TensorFlow 和 Keras？

Question

在 Jupyter Notebook 上，我有以下代码：

!pip install keras
!pip install tensorflow
import tensorflow as tf

在它下面，我运行它后它会吐出这个。

 Requirement already satisfied: keras in c:\users\nollb\anaconda3\lib\site-packages (2.4.3)
Requirement already satisfied: numpy>=1.9.1 in c:\users\nollb\anaconda3\lib\site-packages (from keras) (1.18.5)
Requirement already satisfied: pyyaml in c:\users\nollb\anaconda3\lib\site-packages (from keras) (5.3.1)
Requirement already satisfied: scipy>=0.14 in c:\users\nollb\anaconda3\lib\site-packages (from keras) (1.5.2)
Requirement already satisfied: h5py in c:\users\nollb\anaconda3\lib\site-packages (from keras) (2.10.0)
Requirement already satisfied: six in c:\users\nollb\anaconda3\lib\site-packages (from h5py->keras) (1.15.0)
Requirement already satisfied: tensorflow in c:\users\nollb\anaconda3\lib\site-packages (2.3.1)
Requirement already satisfied: six>=1.12.0 in c:\users\nollb\anaconda3\lib\site-packages (from tensorflow) (1.15.0)

还有更多行，但这是否意味着 keras 和 tensorflow 已成功安装，我可以开始使用这些软件包了吗？

Answer 1

是的，实际上这意味着tensorflow和keras已经安装（“要求已经满足”）。

您可以通过运行来验证这一点

python -c 'import tensorflow as tf; print(tf.__version__)'  # for Python 2
python3 -c 'import tensorflow as tf; print(tf.__version__)'  # for Python 3

Note that nowadays it is recommended to use tensorflow.keras which is integrated into tensorflow instead of the standalone keras package.

Answer 2

您还可以在 jupyter notebook 中运行以下代码片段来检查：

import tensorflow as tf
tf.version.VERSION

import keras
keras.__version__

但是，正如 output 所述：

Requirement already satisfied: tensorflow 
Requirement already satisfied: keras

两个包都已经安装好了，可以开始使用了！