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

This?(duplicate of @thefourtheye answer)

set subtraction operation returns set data.

test = [{'', 'a'}, {'b', ''}]
print [x - {''} for x in test]
print test

Output:

[set(['a']), set(['b'])]
[set(['a', '']), set(['', 'b'])]