Web Reference: Python 3.0 implements a lot of very useful features and breaks backward compatibility. It does it on purpose, so the great features can be implemented even despite the fact Python 2.x code may not work correctly under Python 3.x. So, basically, Python 3.0 is not backward-compatible on purpose. Jun 18, 2009 · Unless it is going through the deprecation process below, the behavior of an API must not change in an incompatible fashion between any two consecutive releases. Python’s yearly release process (PEP 602) means that the deprecation period must last at least two years. See full list on codingdeeply.com
YouTube Excerpt: Understanding why the example program would
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