1011 B
Examples from Python in a Nutshell, 3rd edition
The metaclass MetaBunch example in
original/bunch.py is an exact copy of the last example in
the How a Metaclass Creates a Class section of Chapter 4:
Object Oriented Python from
Python
in a Nutshell, 3rd edition by Alex Martelli, Anna Ravenscroft,
and Steve Holden.
The version in pre3.6/bunch.py is slightly simplified by
taking advantage of Python 3 super() and removing comments
and docstrings, to make it easier to compare to the from3.6
version.
The version in from3.6/bunch.py is further simplified by
taking advantage of the order-preserving dict that appeared
in Python 3.6, as well as other simplifications, such as leveraging
closures in __init__ and __repr__ to avoid
adding a __defaults__ mapping to the class.
The external behavior of all three versions is the same, and the test
files bunch_test.py are identical in the three
directories.