how to activate environment python code example
Example 1: python virtual environment
python3 -m venv env
python -m virtualenv env #py2
source env/bin/activate
#all this is on same directory
Example 2: activate venv
source env/bin/activate
Example 3: create a virtual environment python 3
python3 -m venv /path/to/new/virtual/environment
Example 4: start virtualenv
source env/bin/activate
Example 5: how to activate venv python
python3 -m venv tutorial-env
Example 6: activate venv in python
(tutorial-env) $ pip freeze > requirements.txt
(tutorial-env) $ cat requirements.txt
novas==3.1.1.3
numpy==1.9.2
requests==2.7.0