these streams through sys.stdout and friends, but unfortunately, there are API differences between 2.x and 3.x, especially with regards to how these streams respond to Unicode and binary data. Because in Python 3. All examples in the documentation were written so that they could run on both Python 2.x and Python 3.3 or higher. At the moment, it is strongly recommended is to use Python 2 for Click utilities the system is. Primarily it means that you can print binary data as well as Unicode data on both 2.x and 3.x to the given file in the most appropriate way possible. This is a very carefree function as