Firstletter oneliner

oneliner.py

def firstNonRepeated(s):
    return ([letter for i, letter in enumerate(s) if letter not in (s[:i] + s[i+1:])] + [""])[0]

def first_non_repeated1(s):
    for i, letter in enumerate(s):
	if letter not in (s[:i] + s[i+1:]):
	    return letter
    return ""

def first_non_repeated1(s):
	for i, letter in enumerate(s):
		if letter not in (s[:i] + s[i+1:]):
			return letter
	return ""

def first_non_repeated2(s):
    d = {}
    for letter in s:
        if letter not in d: d[letter] = 1
        else: d[letter]+=1
    for letter in s:
        if d[letter]==1: return letter
    return ""

def first_non_repeated3(s):
    d = defaultdict(int)
    for letter in s:
        d[letter]+=1
    for letter in s:
        if d[letter]==1: return letter
    return ""

if __name__ == "__main__":
    import timeit
    print(timeit.timeit('first_non_repeated1("asdhfas;kjdfhlakj")', setup='from __main__ import first_non_repeated1', number=100000))
    print(timeit.timeit('first_non_repeated2("asdhfas;kjdfhlakj")', setup='from __main__ import first_non_repeated2', number=100000))
    print(timeit.timeit('first_non_repeated3("asdhfas;kjdfhlakj")', setup='from __main__ import first_non_repeated3', number=100000))