On Wednesday, January 6, 2016 at 6:48:28 PM UTC+5:30, mviljamaa wrote: > I'm forming sets by set.adding to sets and this leads to sets such as: > > Set([ImmutableSet(['a', ImmutableSet(['a'])]), ImmutableSet(['b', > 'c'])]) > > Is there way union these to a single set, i.e. get > > Set(['a', 'b', 'c']) > > ?
Dont know what version of python spells it that way.. seems old In 2.7 you can do this: >>> a=set([frozenset(['a']), frozenset(['b','c'])]) >>> {y for x in a for y in x} set(['a', 'c', 'b']) It may be easier to understand written the way set-expressions in math are normally written: {y | x ∈ a, y ∈ x} And then treat the python as an ASCII-fication of the math Likewise >>> frozenset(y for x in a for y in x) frozenset(['a', 'c', 'b']) >>> -- https://mail.python.org/mailman/listinfo/python-list