Remove duplicate characters

Remove duplicate characters of a given string.

from collections import OrderedDict

def remove_duplicate(S):
    return "".join(OrderedDict.fromkeys(S))

# test
print(remove_duplicate("python exercises practice solution"))
print(remove_duplicate("w3resource"))

Output:

python exrcisalu
w3resouc

See also

https://www.w3resource.com/python-exercises/string/python-data-type-string-exercise-61.php