3 # Generate youtube signature algorithm from test cases
9 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]}|:;?/>.<",
10 "J:|}][{=+-_)(*&;%$#@>MNBVCXZASDFGH^KLPOIUYTREWQ0987654321mnbvcxzasdfghrklpoiuytej"),
12 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$^&*()_-+={[]}|:;?/>.<",
13 "!?;:|}][{=+-_)(*&^$#@/MNBVCXZASqFGHJKLPOIUYTREWQ0987654321mnbvcxzasdfghjklpoiuytr"),
14 # 86 - vfl_ymO4Z 2013/06/27
15 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[|};?/>.<",
16 "ertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!/#$%^&*()_-+={[|};?@"),
18 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[};?/>.<",
19 "{>/?;}[.=+-_)(*&^%$#@!MqBVCXZASDFwHJKLPOIUYTREWQ0987654321mnbvcxzasdfghjklpoiuytr"),
21 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[};?>.<",
22 "<.>?;}[{=+-_)(*&^%$#@!MNBVCXZASDFGHJKLPOIUYTREWe098765432rmnbvcxzasdfghjklpoiuyt1"),
24 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!#$%^&*()_+={[};?/>.<",
25 "D.>/?;}[{=+_)(*&^%$#!MNBVCXeAS<FGHJKLPOIUYTREWZ0987654321mnbvcxzasdfghjklpoiuytrQ"),
27 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKHGFDSAZXCVBNM!@#$%^&*(-+={[};?/>.<",
28 "Q>/?;}[{=+-(*<^%$#@!MNBVCXZASDFGHKLPOIUY8REWT0q&7654321mnbvcxzasdfghjklpoiuytrew9"),
31 def find_matching(wrong, right):
32 idxs = [wrong.index(c) for c in right]
34 return ('s[%d]' % i for i in idxs)
37 def _genslice(start, end, step):
38 starts = '' if start == 0 else str(start)
39 ends = ':%d' % (end+step)
40 steps = '' if step == 1 else (':%d' % step)
41 return 's[%s%s%s]' % (starts, ends, steps)
44 for i, prev in zip(idxs[1:], idxs[:-1]):
48 yield _genslice(start, prev, step)
51 if i - prev in [-1, 1]:
60 yield _genslice(start, i, step)
62 def _assert_compress(inp, exp):
63 res = list(compress(inp))
65 print('Got %r, expected %r' % (res, exp))
67 _assert_compress([0,2,4,6], ['s[0]', 's[2]', 's[4]', 's[6]'])
68 _assert_compress([0,1,2,4,6,7], ['s[:3]', 's[4]', 's[6:8]'])
69 _assert_compress([8,0,1,2,4,7,6,9], ['s[8]', 's[:3]', 's[4]', 's[7:5:-1]', 's[9]'])
71 def gen(wrong, right, indent):
72 code = ' + '.join(find_matching(wrong, right))
73 return 'if len(s) == %d:\n%s return %s\n' % (len(wrong), indent, code)
77 return indent + (indent + 'el').join(gen(wrong, right, indent) for wrong,right in tests)
82 if __name__ == '__main__':