【Python】Part I 设置Python环境

 1 import string
 2 import random
 3 import sha
 4  
 5 BASE16 = ‘0123456789ABCDEF‘
 6 BASE30 = ‘123456789ABCDEFGHJKLMNPQRTVWXY‘                                           #charset of License
 7  
 8  
 9 def randomstring(size=20, chars=string.ascii_uppercase + string.digits):
10     return ‘‘.join((random.choice(chars) for _ in range(size)))                     #generate random License
11  
12  
13 def BaseConvert(number, fromdigits, todigits, ignore_negative=True):
14     if not ignore_negative and str(number)[0] == ‘-‘:
15         number = str(number)[1:]
16         neg = 1
17     else:
18         neg = 0
19     x = long(0)
20     for digit in str(number):
21         x = x * len(fromdigits) + fromdigits.index(digit)
22  
23     res = ‘‘
24     while x > 0:
25         digit = x % len(todigits)
26         res = todigits[digit] + res
27         x /= len(todigits)
28  
29     if neg:
30         res = ‘-‘ + res
31     return res
32  
33  
34 def AddHyphens(code):
35     return code[:5] + ‘-‘ + code[5:10] + ‘-‘ + code[10:15] + ‘-‘ + code[15:]        #change format
36  
37  
38 def SHAToBase30(digest):
39     tdigest = ‘‘.join([c for i, c in enumerate(digest) if i / 2 * 2 == i])
40     result = BaseConvert(tdigest, BASE16, BASE30)
41     while len(result) < 17:
42         result = ‘1‘ + result
43     return result
44  
45  
46 def loop(ecx, lichash):
47     part = 0
48     for c in lichash:
49         part = ecx * part + ord(c) & 1048575
50     return part
51  
52 rng = AddHyphens(‘CN‘ + randomstring(18, ‘123456789ABCDEFGHJKLMNPQRTVWXY‘))
53 print ‘License id: ‘ + rng                                                          #generate License id and write it in wing
54 act30 = raw_input(‘Enter request code:‘)                                            #get request code from wing
55 lichash = act30
56 hasher = sha.new()
57 hasher.update(act30)                                                                #sha request code
58 hasher.update(rng)                                                                  #sha license id
59 lichash = AddHyphens(lichash[:3] + SHAToBase30(hasher.hexdigest().upper()))
60 
61 part5 = format(loop(23, lichash), ‘05x‘) + format(loop(161, lichash), ‘05x‘) + format(loop(47, lichash),
62                                                                                       ‘05x‘) + format(loop(9, lichash),
63                                                                                                       ‘05x‘)
64 part5 = BaseConvert(part5.upper(), BASE16, BASE30)
65 while len(part5) < 17:
66     part5 = ‘1‘ + part5
67  
68 part5 = ‘AXX‘ + part5
69 print ‘Activation code: ‘ + AddHyphens(part5)                                       #output Activation code and write it in wing