Project Euler #24

euler24.py

from itertools import islice

def comb(l):
    if len(l) == 0:
        yield []
    else:
        for i in range(len(l)):
            for c in comb(l[:i] + l[i + 1:]):
                yield [l[i]] + c

print ''.join(str(i) for i in
            islice(comb([0,1,2,3,4,5,6,7,8,9]), 999999, 1000000).next())