[Tutor] Uniques values in a list

[Alexandre Ratti]

Hello,


I wanted to filter out unique values in a list. Here is what I found (it is 
a frequent question listed in the Python FAQ) :

1) Using lists:
toto = [1, 2, 2, 4]
titi = []
for x in toto:
	if x not in titi:
		titi.append(x)
print titi
[1, 2, 4]


2) Using dictionaries:
toto = [1, 2, 2, 4]
d = {}
for x in toto:
	d[x] = 0
print d.keys()

This solution modifies the list order and only works if the list content 
can be used as a dictionary key (eg. is it "hashable").
Source : http://www.lemburg.com/files/python/lists.py.html


=> Do you know any other solution (eg. using functional programming or 
similar woodoo)?


Cheers.

Alexandre