Python 3 Creation of virtual environments (3.5+)

python3_create_venv.md

Creating virtual environment

python3 -m venv /path/to/new/virtual/environment

NOTE:

• Changed in version 3.5: The use of venv is now recommended for creating virtual environments.
• Deprecated since version 3.6: pyvenv was the recommended tool for creating virtual environments for Python 3.3 and 3.4, and is deprecated in Python 3.6.

Activate a virtual environment

cd /path/to/new/virtual/environment
source bin/activate

Deactivate a virtual environment

deactivate

Install requirements

pip3 install -r requirements.txt

Export Output installed packages

pip freeze will produce a similar list of the installed packages, but the output uses the format that pip install expects.

pip3 freeze > requirements.txt

List installed packages

Display all of the packages installed in the virtual environment:

pip3 list --format=columns
# or
pip3 freeze