Python 3 with backwards compatibility features
Porting Python code from version 2.x to 3.x is not a simple task. To help, I built a version of Python 3.6 that includes backwards compatibility features. Most important is the mixing of bytes and str objects and comparisons. For example, in vanilla Python 3: >>> b'foo' + 'bar' Traceback (most recent call last): File "", line 1, in TypeError: can't concat bytes to str >>> None ", line 1, in TypeError: unorderable types: NoneType() >> b'foo' + 'bar' sys:1: DeprecationWarning: encoding bytes to str 'foobar' >>> None < 'hi' __main__:1: DeprecationWarning: default compare is depreciated True…
What it does
In the maker’s words, at launch
Porting Python code from version 2.x to 3.x is not a simple task. To help, I built a version of Python 3.6 that includes backwards compatibility features. Most important is the mixing of bytes and str objects and comparisons. For example, in vanilla Python 3: >>> b'foo' + 'bar' Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: can't concat bytes to str >>> None < 'hi' Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: unorderable types: NoneType() < str() In my Python 3: >>> b'foo' + 'bar' sys:1: DeprecationWarning: encoding bytes to str 'foobar' >>> None < 'hi' __main__:1: DeprecationWarning: default compare is depreciated True Certain changes are easy to fix with code converters like 2to3. For example, changing print statements into functions is trivial. I don't bother trying to handle those. There is still a lot of things that could be added. However, when porting a large code base to Python 3, I found it useful. I hope other people might use it and submit improvements. If someone need pre-built binaries (e.g. Windows), I would be willing to do it. https://github.com/nascheme/ppython
Does the same job
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My book titled "Python re(gex)?" is free to download through this weekend [1][2] The book covers both 're' and 'regex' modules, has plenty of examples and chapters also have cheatsheets and exercises. Code snippets, exercises, sample chapters, etc are available on GitHub repo [3] I used pandoc+xelatex [4] to generate the pdf. [1] https://gumroad.com/l/py_regex [2] https://leanpub.com/py_regex [3] https://github.com/learnbyexample/py_regular_expressions [4]…
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Hi everyone! As a side project I made a tiny static website that helps explain format strings used with Python's `struct` module. Type/paste in a format string and you get a quick explanation of the structure instead of having to look through the docs. It's open source, happy to hear any suggestions how to make it more useful.
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