The problem with Python's map and filter – Abhinav Omprakash (abhinavomprakash.com)

> To understand this post you need to understand what values are. In simple terms, entities that can be compared, have a magnitude, and are immutable are values.

> How can you tell if something is a value? Easy, just ask whether it is immutable.

I've never seen this definition of the term 'value' used in Python.

It may (or may not) be the case in Clojure (the author links to a Rich Hickey talk to justify his assertion). But I'm nearly certain that it's false with respect to Python

I wasnt aware of this issue wwith map and filter. I mostly use list comprehensions but you have avoided me some future pain probably. Thanks. Cheers!