Keras已安装在Anaconda虚拟环境中，但无法导入

Question

我已将keras安装到我的Anaconda虚拟环境中，但是无法导入该模块：

$ conda list | grep keras
keras                     2.2.4                    py37_1    conda-forge
keras-applications        1.0.8                      py_0  
keras-preprocessing       1.1.0                      py_1  
keras-retinanet           0.5.0                    pypi_0    pypi

$ python
Python 3.7.3 | packaged by conda-forge | (default, Mar 27 2019, 23:01:00) 
[GCC 7.3.0] :: Anaconda, Inc. on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import keras
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'keras'

可能有什么不对？

Answer 1

最好的选择是在虚拟环境中使用venv。有关说明：

Mac OS和Linux：如何设置虚拟环境

1）克隆存储库后，将cd放入存储库并运行命令：python3 -m venv venv

    This will create the virtual environment. Make sure to name it venv because the .gitignore file
    has been initialized to ignore it by default. 

2）通过运行以下命令来激活虚拟环境：source venv/bin/activate

3）要下载所需的软件包，只需运行：pip install -r requirements.txt

    This will go to the requirements file that is already generated in the repo and download any dependecies.

4）添加任何软件包之后，请确保通过运行以下命令来更新requirements.txt文件：pip freeze > requirements.txt

5）您随时可以运行deactivate离开虚拟环境。

Windows：如何设置虚拟环境

1）克隆存储库后，将cd放入存储库并运行命令：python -m venv venv

    This will create the virtual environment. Make sure to name it venv because the .gitignore file
    has been initialized to ignore it by default. 

2）通过运行以下命令来激活虚拟环境：venv\Scripts\activate.bat

    To activate the virtual environment inside of a code editor's bash, run: venv\Scripts\activate.ps1

3）要下载所需的软件包，只需运行：pip install -r requirements.txt

4）添加任何程序包后，请确保通过运行以下命令来更新requirements.txt文件：pip freeze 然后将它们粘贴到requirements.txt文件中。

5）您随时可以运行deactivate离开虚拟环境。

最后，只需键入pip install keras