您的位置：首页 > 编程语言 > Python开发

用Python超级简单仿163嵌套评论

2014-08-21 16:44 274 查看
用Python精纺163嵌套评论效果

先看图



下面开始简单学习

首先找个库（我就用mysql自带的test库）建立一张mysql的数据表：

DROP TABLE IF EXISTS `messages`;
CREATE TABLE `messages` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`subject` varchar(100) CHARACTER SET utf8 NOT NULL,
`reply_to` int(11) unsigned NOT NULL DEFAULT '0',
`text` mediumtext CHARACTER SET utf8 NOT NULL,
`sender` varchar(50) CHARACTER SET utf8 NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=31 DEFAULT CHARSET=utf-8;


然后你要确定你的系统中已经安装了连接mysql的python模块，怎么确定呢。命令行下，进入python，然后输入import MySQLdb,注意大小写，如果没有报错，说明安装了，如果报错，从网上找python连mysql的方法，很多。
准备就绪，开始分析整个程序吧。
一个很简单的电子公告版，主要功能有，展示所有公告，查看单个公告，编辑公告，保存公告。所以根据功能建立四个文件：main.py,view.py,edit.py,save.py，每个文件，负责一个模块。
下面就上代码吧。 main.py:

#!C:\Python\python.exe
#coding=utf-8

import MySQLdb
print "Content-type:text/html\r\n\r\n"
conn = MySQLdb.connect(host="localhost", user="root", passwd="", db="test")
curs = conn .cursor()

str = ""
def get_tree(reply_to=0,steps=1):
global str
sql = "SELECT * FROM messages WHERE reply_to= %d" % reply_to
curs.execute(sql)
rows = curs.fetchall()
if rows:
for rs in rows:
str += '<ul>'
str += '<li>'
str += '<div class="commentInfo"><span>主题：</span> <a href="view.py?id=%d">%s</a> <br/>' %(rs[0], rs[1])
str += '<span>留言人：</span>{0}  <em class="floorCount">{1}层</em> <p class="content">{2}</p> <a href="edit.py?reply_to={3}">回复<font color="#ccc">{0}</font></a></div>' .format(rs[4], steps, rs[3], rs[0])
get_tree(int(rs[0]),steps+1)
str += '</li>'
str += '</ul>'
return str

print """
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>留言首页</title>
<style>
.commentInfo{color:#1e50a2;font-size:12px;padding-bottom:2px;}
ul{position:relative;border:1px solid #999;background:none repeat scroll 0 0 #ffe;padding:3px;margin:1px 1px 15px;}
ul li{list-style-type:none;}
.floorCount{right:3px;top:0;position: absolute;color: #666;}
.list{width:500px;margin:0px auto}
.content{color:#2b2b2b;font-size:14px;}
</style>
</head>
<body>
<h1>留言列表</h1>
<div class="list">"""
print get_tree()
print """   </div><hr/><p><a href="edit.py">新留言</a></p>
</body>
</html>
"""


view.py

#!C:\Python\python.exe
#coding=utf-8

import cgi
import MySQLdb
import sys
print "Content-type:text/html\r\n\r\n"
conn = MySQLdb.connect(host="localhost", user="root", passwd="", db="test")
curs = conn .cursor()

#接收值
request = cgi.FieldStorage()
id = request.getvalue("id")
try:id = int(id)
except:
print 'Invalid message ID'
sys.exit()

#根据ID查询数据
sql = "SELECT * FROM messages WHERE id=%d" % id
curs.execute(sql)
rows = curs.fetchone()

print '''
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>留言详情</title>
</head>
<body>
<h1>留言详情</h1>
<p><b>主题:</b> %s<br/>
<b>留言人:</b>%s<br/>
<b>内容:</b><pre>%s</pre>
</p><hr/>
<a href='main.py'>返回首页</a>
|
<a href="edit.py?reply_to=%s">回复</a>
</body>
</html>
''' % (rows[1],rows[4],rows[3],rows[0])


edit.py

#!C:\Python\python.exe
#coding=utf-8

import cgi,MySQLdb,sys
print "Content-type:text/html\r\n\r\n"
conn = MySQLdb.connect(host="localhost", user="root", passwd="", db="test")
curs = conn .cursor()

#接收值
request = cgi.FieldStorage()
reply_to = request.getvalue("reply_to")

print '''
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>留言</title>
<style>
form{width:500px;margin:0px auto}
.col{width:300px;}
</style>
</head>
<body>
<h1>留言</h1>
<form action='save.py' method='POST'>
'''
subject = ""
if reply_to is not None:
try:
reply_to = int(reply_to)
#根据ID查询数据
curs.execute("SELECT subject,sender FROM messages WHERE id=%d" % reply_to)
msg=curs.fetchone()
subject = msg[0]
except:
print 'Invalid message ID'
sys.exit()
print '<input type="hidden" name="reply_to" value="%s"/>' % reply_to
start_with = "Re:  "
if not subject.startswith(start_with):
subject = start_with + subject

print '''
<div class="col"><b>主题:</b><input type='text' size='40' name='subject' value='%s' /></div>
<div class="col"><b>留言人:</b><input type='text' size='40' name='sender' /></div>
<div class="col"><b>消息内容:</b><textarea name='text' cols='40' rows='20'></textarea></div>
<div class="col"><input type='submit' value='留言  '/></div>
</form>
<hr/>
<a href='main.py'>返回首页</a>
</body>
</html>
''' % subject


save.py

#!C:\Python\python.exe
#coding=utf-8

import MySQLdb
print "Content-type:text/html\r\n\r\n"
conn = MySQLdb.connect(host="localhost", user="root", passwd="", db="test")
curs = conn .cursor()

def addslashes(string):
if string:
return string.replace("'","\\'")
return string

#接收值
import cgi,sys
request = cgi.FieldStorage()

reply_to = addslashes(request.getvalue("reply_to"))
subject = addslashes(request.getvalue("subject"))
sender = addslashes(request.getvalue("sender"))
text = addslashes(request.getvalue("text"))

#判断
if (not sender) or (not subject) or (not text):
print "Please "
sys.exit()

#插入数据到库中去
if reply_to is not None:
try:reply_to = int(reply_to)
except:
print 'Invalid message ID'
sys.exit()
sql = "INSERT INTO messages (reply_to,subject,sender,text) VALUES (%d,'%s','%s','%s')" % (reply_to, subject, sender, text)
else:
sql = "INSERT INTO messages (subject,sender,text) VALUES ('%s','%s','%s')" % (subject, sender, text)
#print sql
#sys.exit()

curs.execute(sql)
conn.commit()

print '''
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>提交留言</title>
</head>
<body>
<h1>留言已经提交</h1>
<hr/>
<a href='main.py'>回到首页</a>
</body>
</html>
'''


赶快去试试吧
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 点击这里给我发消息
标签： 
相关文章推荐
新的分享
章节导航