Python is not a functional programming language, but it is a multi-paradigm language that makes functional programming easy to perform, and easy to mix with other programming styles. In this paper David mertz, a director of Python software foundation, examines the functional aspects of the language and points out which options work well and which ones you should generally decline.
mertz describes ways to avoid Python's imperative-style flow control, the nuances of callable functions, how to work lazily with iterators, and the use of higher-order functions. He also lists several third-party Python libraries useful for functional programming.

David Mertz

David Mertz is a director of the PSF, and chair of its Trademarks Committee and Outreach & Education Committee. He wrote the columns Charming Python and XML Matters for IBM developerWorks and the Addison-Wesley book Text Processing in Python, has spoken at multiple OSCONs and PyCons, and was invited to be a keynote speaker at PyCon India, PyCon UK, PyCon ZA, and PyCon Belarus.

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