list(set(alist))

import randomif __name__=='__main__':    a=[random.randint(0,10) for i in xrange(10)]    b=list(set(a))    b.sort(key=a.index)

{}.fromkeys(alist).keys()

import randomif __name__=='__main__':    a=[random.randint(0,10) for i in xrange(10)]    d={}    for i in a:        d[i]=1    PRint d.keys()

import randomif __name__=='__main__':    a=[random.randint(0,10) for i in xrange(10)]    a.sort()    print [x for i,x in enumerate(a) if not i or x!=a[i-1]]

import randomimport itertoolsif __name__=='__main__':    a=[random.randint(0,10) for i in xrange(10)]    a.sort()    print [x[0] for x in itertools.groupby(a)]

import randomif __name__=='__main__':    a=[random.randint(0,10) for i in xrange(10)]    b=[]     for i in a:        if i not in b:            b.append(i)

import randomimport functoolsif __name__=='__main__':    a=[random.randint(0,10) for i in xrange(10)]    functools.reduce(lambda x,y:x if y in x else x+[y],[[],]+a)