Unique characters: Difference between revisions

=={{header|Python}}==

<lang python>'''Unique characters'''

from itertools import chain, groupby

# uniques :: [String] -> [Char]

def uniques(ks):

'''Characters which occur only once

across the given strings.

'''

return [

k for k, g in

groupby(sorted(chain(*ks)))

if 1 == len(list(g))

]

# ------------------------- TEST -------------------------

# main :: IO ()

def main():

'''Characters occurring only once

across a list of 3 given strings.

'''

print(

uniques([

"133252abcdeeffd",

"a6789798st",

"yxcdfgxcyz"

])

)

# MAIN ---

if __name__ == '__main__':

main()</lang>

{{Out}}

<pre>['1', '5', '6', 'b', 'g', 's', 't', 'z']</pre>