How to remove specific element from sets inside a list using list comprehension

Question

I think this may be related to set being mutable.

Basically, I can remove an element from a set using set.discard(element). However, set.d

Answer 1

Whenever you feel constrained by a method that only works in-place, you can use the behavior of or/and to achieve the semantics that you want.

[x.discard('') or x for x in test]

This technique is occasionally useful for achieving things in a lambda (or other situations where you are restricted to a single expression) that are otherwise impossible. Whether it's the most "readable" or "pythonic" is debatable :-)