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

You can use set difference operator, like this

test, empty = [{'', 'a'}, {'b', ''}], {''}
print [x - empty for x in test]
# [set(['a']), set(['b'])]