# 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_](https://learning.oreilly.com/library/view/python-in-a/9781491913833) 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.