3 # Generate youtube signature algorithm from test cases
8 # 92 - vflQw-fB4 2013/07/17
9 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]}|:;?/>.<'`~\"",
10 "mrtyuioplkjhgfdsazxcvbnq1234567890QWERTY}IOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]\"|:;"),
12 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]}|:;?/>.<'`",
13 "mrtyuioplkjhgfdsazxcvbne1234567890QWER[YUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={`]}|"),
15 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[]}|:;?/>.<",
16 "J:|}][{=+-_)(*&;%$#@>MNBVCXZASDFGH^KLPOIUYTREWQ0987654321mnbvcxzasdfghrklpoiuytej"),
17 # 87 - vflART1Nf 2013/07/24
18 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$^&*()_-+={[]}|:;?/>.<",
19 "tyuioplkjhgfdsazxcv<nm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$^&*()_-+={[]}|:;?/>"),
20 # 86 - vfl_ymO4Z 2013/06/27
21 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[|};?/>.<",
22 "ertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!/#$%^&*()_-+={[|};?@"),
23 # 85 - vflSAFCP9 2013/07/19
24 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[};?/>.<",
25 "ertyuiqplkjhgfdsazx$vbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#<%^&*()_-+={[};?/c"),
27 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!@#$%^&*()_-+={[};?>.<",
28 "<.>?;}[{=+-_)(*&^%$#@!MNBVCXZASDFGHJKLPOIUYTREWe098765432rmnbvcxzasdfghjklpoiuyt1"),
29 # 83 - vflcaqGO8 2013/07/11
30 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKJHGFDSAZXCVBNM!#$%^&*()_+={[};?/>.<",
31 "urty8ioplkjhgfdsazxcvbqm1234567S90QWERTYUIOPLKJHGFDnAZXCVBNM!#$%^&*()_+={[};?/>.<"),
33 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKHGFDSAZXCVBNM!@#$%^&*(-+={[};?/>.<",
34 "Q>/?;}[{=+-(*<^%$#@!MNBVCXZASDFGHKLPOIUY8REWT0q&7654321mnbvcxzasdfghjklpoiuytrew9"),
35 # 81 - vflLC8JvQ 2013/07/25
36 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKHGFDSAZXCVBNM!@#$%^&*(-+={[};?/>.",
37 "C>/?;}[{=+-(*&^%$#@!MNBVYXZASDFGHKLPOIU.TREWQ0q87659321mnbvcxzasdfghjkl4oiuytrewp"),
38 # 79 - vflLC8JvQ 2013/07/25 (sporadic)
39 ("qwertyuioplkjhgfdsazxcvbnm1234567890QWERTYUIOPLKHGFDSAZXCVBNM!@#$%^&*(-+={[};?/",
40 "Z?;}[{=+-(*&^%$#@!MNBVCXRASDFGHKLPOIUYT/EWQ0q87659321mnbvcxzasdfghjkl4oiuytrewp"),
43 def find_matching(wrong, right):
44 idxs = [wrong.index(c) for c in right]
46 return ('s[%d]' % i for i in idxs)
49 def _genslice(start, end, step):
50 starts = '' if start == 0 else str(start)
51 ends = ':%d' % (end+step)
52 steps = '' if step == 1 else (':%d' % step)
53 return 's[%s%s%s]' % (starts, ends, steps)
56 for i, prev in zip(idxs[1:], idxs[:-1]):
60 yield _genslice(start, prev, step)
63 if i - prev in [-1, 1]:
72 yield _genslice(start, i, step)
74 def _assert_compress(inp, exp):
75 res = list(compress(inp))
77 print('Got %r, expected %r' % (res, exp))
79 _assert_compress([0,2,4,6], ['s[0]', 's[2]', 's[4]', 's[6]'])
80 _assert_compress([0,1,2,4,6,7], ['s[:3]', 's[4]', 's[6:8]'])
81 _assert_compress([8,0,1,2,4,7,6,9], ['s[8]', 's[:3]', 's[4]', 's[7:5:-1]', 's[9]'])
83 def gen(wrong, right, indent):
84 code = ' + '.join(find_matching(wrong, right))
85 return 'if len(s) == %d:\n%s return %s\n' % (len(wrong), indent, code)
89 return indent + (indent + 'el').join(gen(wrong, right, indent) for wrong,right in tests)
94 if __name__ == '__main__':