how to use a virtual environment python code example

Example 1: virtual env create python

#------FOR LINUX/MAC---------#
#installing venv 
sudo apt-get install python3.6-venv
#creating virtual env
python3 -m venv env
#activating virtual env
source env/bin/activate


#-------FOR WINDOWS----------#
#installing venv
py -m pip install --user virtualenv
#creating virtual env
py -m venv env
#activating virtual env
.\env\Scripts\activate

Example 2: how to create a virtual environment in python

source env/bin/activate

Example 3: activate venv

venv\Scripts\activate.bat

Example 4: how to activate venv python

tutorial-env\Scripts\activate.bat

Example 5: activate python virtual environment

# activate python enviroment with global packages

python -m venv env --system-site-packages

Example 6: activate venv in python

(tutorial-env) $ pip search astronomy
skyfield               - Elegant astronomy for Python
gary                   - Galactic astronomy and gravitational dynamics.
novas                  - The United States Naval Observatory NOVAS astronomy library
astroobs               - Provides astronomy ephemeris to plan telescope observations
PyAstronomy            - A collection of astronomy related tools for Python.
...