Translators have always insisted on using Python 3 because it represents the future of Python. Although backward compatibility is its flaw, this situation will change sooner or later, and the future of Python 3 needs everyone's help and support. At present, most of the tutorial books on the market and online manuals are basically 2.x series, and there are few books based on 3.x series. "Python Cookbook" 3rd Edition, which is completely based on Python 3, is a very well written book. This is...