March 2010
Beginner to intermediate
412 pages
11h 40m
English
Content preview from Dive Into Python 3
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APPENDIX A ■ PORTING CODE TO PYTHON 3 WITH 2TO3
324
1. Declaring the metaclass in the class declaration worked in Python 2 and it still
works the same in Python 3.
2. Declaring the metaclass in a class attribute worked in Python 2, but it doesn’t
work in Python 3.
3. The 2to3 script is smart enough to construct a valid class declaration, even if
the class is inherited from one or more base classes.
Matters of Style
The rest of the “fixes” listed here aren’t really fixes per se. That is, the things they change are matters of
style, not substance. They work just as well in Python 3 as they do in Python 2, but the developers of
Python have ...
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