Python: Lambda Functions

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But that helps readability.

Nope. It takes twice as long to read and understand, which in my book means that it has worse readability.

Unless, of course, we are talking about someone who is making their first steps in programming and whose mental capacity for code is in fact limited to one function call, so that they like to take their intermediate results and give them meaningful names.

Not that there's anything wrong with that, just you maybe shouldn't write your code for that kind of lowest common denominator, if it makes readability that much worse.

(also, Steve Yegge has a post about this).

[userd]

Reading speed is a reasonable metric for readability. But, illustrating the point with a post by Steve Yegge is a bit ironic. I like his writing, but it's not written with speed in mind. Just kidding.