Throughout this book, we will be working with different frameworks, packages, and libraries to create RESTful Web APIs and microservices, and therefore, it is convenient to work with Python virtual environments to isolate each development environment. Python 3.3 introduced lightweight virtual environments and they were improved in subsequent Python versions. We will work with these virtual environments and, therefore, you will need Python 3.7.1 or higher. You can read more about the PEP 405 Python virtual environment, which introduced the venv module, at https://www.python.org/dev/peps/pep-0405. All the examples for this book were tested on Python 3.7.1 on Linux, macOS, and Windows.
In case you ...
