how to activate a virtual environment in python code example
Example 1: python virtual environment
python3 -m venv env
python -m virtualenv env
source env/bin/activate
Example 2: how to use virtual environment python
python3 -m venv env
Example 3: create virtual environment python 3
python3 -m venv /path/to/new/virtual/environment
Example 4: how to create a virtual environment in python
source env/bin/activate
Example 5: how virtual environment in python works
>>> import sys
>>> sys.prefix
'/System/Library/Frameworks/Python.framework/Versions/3.5'