I really wasn't awake when I wrote this, because that second example is awful. It should be: {k:v for k, v in something.iteritems() if v == 3} vs dict(fi

I really wasn't awake when I wrote this, because that second example is awful. It should be: {k:v for k, v in something.iteritems() if v == 3} vs dict(filter(lambda x: x[1] == 3, something.iteritems()))