10.5 Recall
This chapter looked at a design pattern that seems ubiquitous in Python, the iterator. The Python iterator concept is the foundation of the language and is used widely. In this chapter, we examined a number of aspects:
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Design patterns are good ideas that we see repeated in software implementations, designs, and architectures. A good design pattern has a name, and a context where it’s usable. Because it’s only a pattern, not reusable code, the implementation details will vary each time the pattern is followed.
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The Iterator protocol is one of the most powerful design patterns because it provides a consistent way to work with data collections. We can view strings, tuples, lists, sets, and even files as iterable collections. A mapping contains a number of iterable collections, including the keys, the values, and the items (key and value pairs).
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List, set, and dictionary...
