Setting up a virtual environment with Tornado

In Chapter 1, Developing RESTful APIs with Django, we learned that, throughout this book, we were going to work with the lightweight virtual environments introduced in Python 3.3 and improved in Python 3.4. Now, we will follow many steps create a new lightweight virtual environment to work with Tornado. It is highly recommended to read Chapter 1, Developing RESTful APIs with Django, in case you don't have experience with lightweight virtual environments in Python. The chapter includes all the detailed explanations about the effects of the steps we are going to follow.

First, we have to select the target folder or directory for our virtual environment. The following is the path we will use in the example for macOS and Linux. The target folder for the virtual environment will be the PythonREST/Tornado01 folder within our home directory. For example, if our home directory in macOS or Linux is /Users/gaston, the virtual environment will be created...