Conda environment management

documentation link

1. Important commands

1. Check existing environments conda env list
   • Warning: env before list, if you type conda list env, if will show the packages installed in one of the environments.
2. Create an environment

   conda create -n myenv
   

   or

   conda create --name myenv
   

   • if we want to create enviroment with specific python version:

     conda create -n myenv python=3.6
     

   • if we want to create environment with specific packages with specific version:

conda create -n myenv scipy=0.15.0 numpy 

• we can also install packages after creating environment.

conda install -n myenv scipy

• To clone(duplicate) an environment

conda create --name newenv --clone myenv

1. Remove an environment

   conda remove -n myenv --all
   

   • verify the delete by

     conda info --envs 
     

     or

     conda env list 
     

2. Activate an environment

   conda activate myenv
   

   • Warning: there is no need for argument ‘-n’
3. Deactivate an environment

   conda deactivate
   

4. Check packages in a specific environment

   conda list -n myenv
   

   • Or, if the env is already activated

     conda list 
     

   • If we only want to check if a specific package is installed

     conda list -n myenv scipy
     

2. Conda vs pip

• pip is a package manager only for Python
• venv is a environment manager only for Python
• conda is both a package and environment manager and is language agnostic(works with any languages)

3. Why it always showing module not found, even I have already installed it?

• Remember to use conda install instead of pip install