Union of multiple sets in python

Question

[[1, \'34\', \'44\'], [1, \'40\', \'30\', \'41\'], [1, \'41\', \'40\', \'42\'], [1, \'42\', \'41\', \'43\'], [1, \'43\', \'42\', \'44\'], [1, \'44\', \'34\', \'43\']         


        

Answer 1

Using the unpacking operator *:

>> list(set.union(*map(set, a)))
[1, '44', '30', '42', '43', '40', '41', '34']

(Thanks Raymond Hettinger for the comment!)

(Note that

set.union(*tup)

will unpack to

set.union(tup[0], tup[1], ... tup[n - 1])

)