create virtual environment in python on mac code example

Example 1: virtual environment mac

1. 	# Creates the virtual enviroment.
	virtualenv venv
  
2.  # Activates virtual enviroment.
	source venv/bin/activate

Example 2: create virtualenv python3 mac

$ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"