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Functional Python Programming, 3rd edition
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One of the ideas that emerges from the previous list of topics is that many functional programming constructs are already present in Python. Indeed, elements of functional programming are already a very typical and common part of OOP.
As a very specific example, a fluent Application Program Interface (API) is a very clear example of functional programming. If we take time to create a class with return
self
in each method, we can use it as follows:
some_object.foo().bar().yet_more()
We can just as easily write several closely related functions that work as follows:
yet_more(bar(foo(some_object)))
We’ve switched the syntax from traditional object-oriented suffix notation to a more functional prefix notation. Python uses both notations freely, often using a prefix version of a special method name. For example, the len()
function is generally implemented by the __len__()
class special method.
Of course, the implementation of the preceding class might involve...