pay包注释(一)

lovep2c项目pay模块注释：

views.py:

def create_user_no(email):
    return md5(email).hexdigest().upper() + "".join([choice(string.letters) for i in range(8)])

/*

*　　md5(email).hexdigest().upper() 用md5算法对email进行加密，采用十六进制数并将其转化为大写

*　　print (hashlib.md5('451314789@qq.com'))  ===  <md5 HASH object @ 0xa0936b0>

*　　print (hashlib.md5('451314789@qq.com').hexdigest())  ===  1d289b39ecb32b5e3dc4a7463e20d030

*　　print (hashlib.md5('451314789@qq.com').hexdigest().upper())  ===  1D289B39ECB32B5E3DC4A7463E20D030

*　　choice(string.letters) for i in range(8)  类似于for(i=0;i<8;i++) {random.choice(string.letters)}

*　　>>> create_user_no('451314789@qq.com')
　　　　　　'1D289B39ECB32B5E3DC4A7463E20D030ZdPsLmNo'
　　  >>> print (hashlib.md5('451314789@qq.com').hexdigest().upper())
　　　　　　1D289B39ECB32B5E3DC4A7463E20D030

*/

String包介绍：

1. >>> import string
2. >>> string.digits
3. '0123456789'
4. >>> string.hexdigits
5. '0123456789abcdefABCDEF'
6. >>> string.octdigits
7. '01234567'
8. >>> string.letters
9. 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
10. >>> string.lowercase
11. 'abcdefghijklmnopqrstuvwxyz'
12. >>> string.uppercase
13. 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
14. >>> string.printable
15. '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~ \t\n\r\x0b\x0c'
16. >>> string.punctuation
17. '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~'
18. >>> string.whitespace
19. '\t\n\x0b\x0c\r '
20. >>>
1.  
   string.atof(s)将字符串转为浮点型数字
   1. >>> string.atof("1.23")
   2. 1.23
   3. >>> string.atof("1")
   4. 1.0

   string.atoi(s,[base=num])将字符串转为整型数字,base 指定进制

   1. >>> string.atoi("20")
   2. 20
   3. >>> string.atoi("20",base=10)
   4. 20
   5. >>> string.atoi("20",base=16)
   6. 32
   7. >>> string.atoi("20",base=8)
   8. 16
   9. >>> string.atoi("20",base=2)
   10. Traceback (most recent call last):
   11. File "<stdin>", line 1, in <module>
   12. File "/usr/lib64/python2.6/string.py", line 403, in atoi
   13. return _int(s, base)
   14. ValueError: invalid literal for int() with base 2: '20'
   15. >>> string.atoi("101",base=2)
   16. 5
   17. >>> string.atoi("101",base=6)
   18. 37

   string.capwords(s,sep=None)以sep作为分隔符，分割字符串s，然后将每个字段的首字母换成大写

    

   1. >>> string.capwords("this is a dog")
   2. 'This Is A Dog'
   3. >>> string.capwords("this is a dog",sep=" ")
   4. 'This Is A Dog'
   5. >>> string.capwords("this is a dog",sep="s")
   6. 'This is a dog'
   7. >>> string.capwords("this is a dog",sep="o")
   8. 'This is a doG'
   9. >>>

   string.maketrans(s,r)创建一个s到r的转换表，然后可以使用translate()方法来使用

    

   1. >>> replist=string.maketrans("123","abc")
   2. >>> replist1=string.maketrans("456","xyz")
   3. >>> s="123456789"
   4. >>> s.translate(replist)
   5. 'abc456789'
   6. >>> s.translate(replist1)
   7. '123xyz789'