python学习之最简单的用户注册及登录验证小程序

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正如很多同学所知道的，楼主开始学习python了，前进的道路曲曲折折，有荆棘也有陷阱，从最简单的小程序写起，每天练习，将python进行到底。

有一点比较别扭的就是python的换行之后空四个空格，ruby都是两个，并且python在方法和循环语句的第一句都要加冒号

mysql> show create table user;
mysql> alter table user add salt char(10);

import hashlib
In [64]: passwd='111111'

In [67]: md5pass=hashlib.md5(passwd)

In [69]: hashlib.md5(passwd).hexdigest()
Out[69]: '96e79218965eb72c92a549dd5a330112'

In [70]: hashlib.sha1(passwd).hexdigest()
Out[70]: '3d4f2bf07dc1be38b20cd6e46949a1071f9d0e3d'

In [71]: len(hashlib.sha1(passwd).hexdigest())
Out[71]: 40

In [72]: import string

In [73]: import random
In [74]: string.letters
Out[74]: 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'

In [75]: string.digits
Out[75]: '0123456789'

In [76]: string.digits+string.letters
Out[76]: '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'

In [77]: random.sample(string.letters,5)
Out[77]: ['S', 'E', 'w', 'F', 'L']

In [78]: ''.join(random.sample(string.letters,10))
Out[78]: 'RVviZAqLQK'

dbconfig ={
'host':'localhost',
'user':'root',
'passwd':'',
'charset':'utf8',
'db':'db_02'
}
import MySQLdb
import string
import random
import hashlib

class User(object):
def __init__(self, name, email, passwd,salt):
conn = MySQLdb.connect(**dbconfig)
cursor = conn.cursor()
sql = 'insert into user(name, email, password, salt) values(%s, %s, %s, %s)'
cursor.execute(sql, (name, email, passwd, salt))
#self.name = name
#self.email = email
conn.commit()
cursor.close()
conn.close()

@staticmethod
def regist( name, email, passwd):
salt,passwd = User.salt_passwd(passwd)
User(name, email, passwd, salt)

@staticmethod
def login(name, passwdin):
conn = MySQLdb.connect(**dbconfig)
cursor = conn.cursor()
sql = 'select id,name,email,password,salt from user where name=%s'
if cursor.execute(sql, (name,)):
userid,name, email, passwd, salt =cursor.fetchone()
#print cursor.fetchone()
salt_passwdin = hashlib.sha1(salt+passwdin).hexdigest()
if passwd == salt_passwdin:
return userid
return None

#def get_user(userid)
def get_name(self, userid):
return userid, name, email,

@staticmethod
def salt_passwd(passwd):
salt = ''.join(random.sample(string.letters, 10))
passwd = hashlib.sha1(salt+passwd).hexdigest()
return salt, passwd

testuser = {
'name':'alen',
'passwd':'111111',
'email':'alen@a.com'
}

#User.regist(**testuser)

print User.login(name='alenaaa', passwdin='11111')