Python-сообщество

>>> type({}.keys())
<type 'list'>
>>>

data = [data.pop(0) for i in data]

data = [1, 2, 3, 1, 2, 3, 1, 2, 3]

def rem(data, i):
    while i in data: data.remove(i)
    return i

data = [rem(data, i) for i in data]

data = [1, 2, 3, 4, 1, 2, 3, 5]

for i, e in enumerate(data):
    if data.pop(i) not in data:
        data.insert(i, e)

for e in data:
    if data.count(e) > 1:
        data.remove(e)

for i in xrange(len(data)-1, -1, -1):
    if data.count(data[i]) != 1: del data[i]

>>> super(type({}.keys()))
<super: <class 'dict_keys'>, NULL>
>>>

>>> super(type({}.keys()))
<super: <class 'list'>, NULL>
>>>

>>> l = [1, 2, 3, 4, 1, 2, 3, 5]
>>> l = list(dict(zip(l, l)).values())
>>> l
[1, 2, 3, 4, 5]
>>>

>>> l = [1, 2, 3, 4, 1, 2, 3, 5]
>>> l = [l.pop(0) for i in l]
>>> l
[1, 2, 3, 4]
>>>

>>> l = [1, 2, 3, 4, 1, 2, 3, 5]
>>> l = l*2
>>> l
[1, 2, 3, 4, 1, 2, 3, 5, 1, 2, 3, 4, 1, 2, 3, 5]
>>> for e in l:
...     if l.count(e) > 1:
...         l.remove(e)
...
>>> l
[4, 2, 2, 4, 1, 2, 3, 5]
>>>