At WWDC 2019 on June 3, 2019, starting with macOS Catalina (10.15), the macOS will use zsh as default shell across the operating system. Besides, Bash is still available along with the new zsh; however, by setting zsh as the default shell, Apple does force you to move to the new platform.
virtualenvwrapper is a set of extensions to the original virtualenv which is a tool for creating isolated virtual Python environments. The extensions include wrappers for creating and deleting virtual environments and otherwise managing your development workflow, making it easier to work on more than one project at a time without introducing conflicts in their dependencies. According to the virtualenvwrapper docs, there are some noteworthy features such as:
- Organizes all your virtual environments in one place.
- Wrappers for managing your virtual environments (create, delete, copy).
- Use a single command to switch between environments.