I believe I found the solution.

1. Install virtualenvwrapper
2. Run the setup:

(require 'virtualenvwrapper) (venv-initialize-interactive-shells) ;; if you want interactive shell support (venv-initialize-eshell) ;; if you want eshell support (setq venv-location "/path/to/your/virtualenvs/") 

3. Finally, workon the desired virtual environment. Then you can run code block and use the desired interpreter.

I believe I found the solution.

1. Install virtualenvwrapper

2. Run the setup:

   (require 'virtualenvwrapper) (venv-initialize-interactive-shells) ;; if you want interactive shell support (venv-initialize-eshell) ;; if you want eshell support (setq venv-location "/path/to/your/virtualenvs/")

3. Finally, workon the desired virtual environment. Then you can run code block and use the desired interpreter.