Install Anaconda
Note: It’s not good practice to share environments with other users. Make sure make a backup of your startup file and that you launch a new terminal after the installation. Example below is for bash.
cp -p ~/.profile ~/.profile.orig
You can find the latest version here: https://www.anaconda.com/distribution/#download-section
Note that the graphical installer is the easiest to use although a command-line instruction is also available here https://docs.anaconda.com/anaconda/install/mac-os/
Make sure you allow Anaconda to modify your bash profile otherwise it will not work
Test your install of Anaconda by running the following
conda --version
To update, make sure you are in your home directory
cd ~; conda update -n base -c defaults conda
Getting multiple versions of python
List the versions of python you available.
conda search python
Create an environment with that version.
#py27 is the name of the environment, you may name the environment anything. #assuming we have python 3.7 and are trying to create an environment for python 2.7, run: conda create -n py27 python=2.7 anaconda
We now have two environments, the original environment with python 3.7, and a second one for 2.7
To list all available environment runs:
conda info --envs
or
conda env list
Switching between environments
To switch between environments, run the following
#Assuming py27 is the environment name, run: conda activate /Users/john/anaconda3/envs/py27 #To switch back to the original environment, run: conda deactivate
Activating and Deactivating Anaconda
Instead of uninstalling anaconda, you can activate and deactivate Anaconda when needed.
NOTE: The commands below only works on Conda 4.6 and newer.
Permanently
The following command will stop Anaconda from launching the base environment upon launching terminal and when opening new terminal windows.
conda config --set auto_activate_base false
The Command below will re-enable base environment upon launching terminal and new terminal windows.
conda config --set auto_activate_base true
Temporarily
The following commands will temporarily activate and deactivate Anaconda in a single terminal window. Opening a new terminal window will open in anaconda's base environment.
Activating Anaconda
conda activate
Deactivating Anaconda
conda deactivate
Activating Anaconda prior to 4.6
source activate
Deactivating Anaconda prior to 4.6
source deactivate
Deleting environments
https://iq.opengenus.org/delete-conda-environment/
Exporting and Importing Environments
Exporting environments
conda env export > environment.yml
Importing environments
conda env create -f environment.yml
reference https://docs.anaconda.com/anaconda/user-guide/tasks/switch-environment/