Using Conda to manage dependencies
You can install additional libraries and packages from the workbench, using either the command prompt or the terminal. Alternatively, you might choose to use a package manager such as Conda to install and maintain packages and their dependencies. This topic describes some basic usage guidelines for Conda.
Cloudera AI recommends using pip for package
management along with a requirements.txt
file (as
described in the previous section). However, for users that prefer
Conda, the default engine in Cloudera AI includes
two environments called python2.7
, and
python3.6
. These environments are added to
sys.path
, depending on the version of Python selected
when you launch a new session.
In Python 2 and Python 3 sessions and attached terminals,
Cloudera AI automatically sets the
CONDA_DEFAULT_ENV
and CONDA_PREFIX
environment variables to point to Conda environments under
/home/cdsw/.conda
.
feather-format
package into the
python3.6
environment, run the following command in the Workbench command
prompt:!conda install -y -c conda-forge python=3.6.9 feather-format
To install a package into the python2.7
environment,
run:!conda install -y -c conda-forge python=2.7.17 feather-format
Note that on sys.path
, pip packages have precedence
over conda packages.
Creating an extensible engine with Conda
- Add the following lines to a Dockerfile to extend the base engine, push the engine
image to your Docker registry, and include the new engine in the allowlist, for your
project. For more details on this step, see Configuring the engine
environment. Python 2
RUN mkdir -p /opt/conda/envs/python2.7 RUN conda install -y nbconvert python=2.7.17 -n python2.7
Python 3RUN mkdir -p /opt/conda/envs/python3.6 RUN conda install -y nbconvert python=3.6.9 -n python3.6
- Set the
PYTHONPATH
environmental variable as shown below. You can set this either globally in the site administrator dashboard, or for a specific project by going to the project's page.Python 2PYTHONPATH=$PYTHONPATH:/opt/conda/envs/python2.7/lib/python2.7/site-packages
Python 3PYTHONPATH=$PYTHONPATH:/opt/conda/envs/python3.6/lib/python3.6/site-packages