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Comprehensions are a concise syntax for describing lists, sets and dictionaries.
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Comprehensions operate on a iterable source object and apply an optional predicate filter and a mandatory expression, both of which are usually in terms of the current item.
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The iterables objects are objects over which we can iterate item-by-item.
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We retrieve an iterator from an iterable object using the built-in iter() function.
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Iterators produce items one-by-one from the underlying iterable series each time they are passed to the built-in next() function.
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Iterators raise a StopIteration exception when the collection is exhausted.
Summary
Generators
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Generator functions allow us to describe sequences using imperative code...
