[Python-Dev] functools.compose to chain functions together (original) (raw)

Stefan Behnel stefan_ml at behnel.de
Mon Aug 17 11:14:05 CEST 2009

Antoine Pitrou wrote:

Raymond Hettinger <python rcn.com> writes:

IMO, its only virtue is that people coming from functional languages are used to having compose. Otherwise, it's a YAGNI. Then I wonder how partial() ended up in the stdlib. It seems hardly more useful than compose().

I would certainly consider it more useful, but that aside, it's also a lot simpler to understand and use than the proposed compose() function. I think the main difference is that compose() requires functional/math skills to be used and read correctly (and might still be surprising in some corner cases), whereas partial() only requires you to understand how to set a function argument. Totally different level of mental complexity, IMHO.

Stefan

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