一、web.py简介
web.py是一款轻量级的Python web开发框架，简单、高效、学习成本低，特别适合作为python web开发的入门框架。官方站点：http://webpy.org/

二、web.py安装
1、下载：http://webpy.org/static/web.py-0.33.tar.gz
2、解压并进入web.py-0.33目录，安装：python setup.py install

三、创建简易博客
1、目录说明：主目录blog/，模板目录blog/templates
2、在数据库“test”中创建表“entries”

CREATE TABLE entries ( 
  id INT AUTO_INCREMENT, 
  title TEXT, 
  content TEXT, 
  posted_on DATETIME, 
  primary key (id) 
); 

3、在主目录创建blog.py，blog/blog.py

#载入框架
import web
#载入数据库操作model（稍后创建）
import model
#URL映射
urls = (
    \'/\', \'Index\',
    \'/view/(/d+)\', \'View\',
    \'/new\', \'New\',
    \'/delete/(/d+)\', \'Delete\',
    \'/edit/(/d+)\', \'Edit\',
    \'/login\', \'Login\',
    \'/logout\', \'Logout\',
    )
app = web.application(urls, globals())
#模板公共变量
t_globals = {
  \'datestr\': web.datestr,
  \'cookie\': web.cookies,
}
#指定模板目录，并设定公共模板
render = web.template.render(\'templates\', base=\'base\', globals=t_globals)
#创建登录表单
login = web.form.Form(
           web.form.Textbox(\'username\'),
           web.form.Password(\'password\'),
           web.form.Button(\'login\')
           )
#首页类
class Index:
  def GET(self):
    login_form = login()
    posts = model.get_posts()
    return render.index(posts, login_form)
  def POST(self):
    login_form = login()
    if login_form.validates():
      if login_form.d.username == \'admin\' /
        and login_form.d.password == \'admin\':
        web.setcookie(\'username\', login_form.d.username)
    raise web.seeother(\'/\')
#查看文章类
class View:
  def GET(self, id):
    post = model.get_post(int(id))
    return render.view(post)
#新建文章类
class New:
  form = web.form.Form(
             web.form.Textbox(\'title\',
             web.form.notnull,
             size=30,
             description=\'Post title: \'),
             web.form.Textarea(\'content\',
             web.form.notnull,
             rows=30,
             cols=80,
             description=\'Post content: \'),
             web.form.Button(\'Post entry\'),
             )
  def GET(self):
    form = self.form()
    return render.new(form)
  def POST(self):
    form = self.form()
    if not form.validates():
      return render.new(form)
    model.new_post(form.d.title, form.d.content)
    raise web.seeother(\'/\')
#删除文章类
class Delete:
  def POST(self, id):
    model.del_post(int(id))
    raise web.seeother(\'/\')
#编辑文章类
class Edit:
  def GET(self, id):
    post = model.get_post(int(id))
    form = New.form()
    form.fill(post)
    return render.edit(post, form)
  def POST(self, id):
    form = New.form()
    post = model.get_post(int(id))
    if not form.validates():
      return render.edit(post, form)
    model.update_post(int(id), form.d.title, form.d.content)
    raise web.seeother(\'/\')
#退出登录
class Logout:
  def GET(self):
    web.setcookie(\'username\', \'\', expires=-1)
    raise web.seeother(\'/\')
#定义404错误显示内容
def notfound():
  return web.notfound(\"Sorry, the page you were looking for was not found.\")
  
app.notfound = notfound
#运行
if __name__ == \'__main__\':
  app.run()

4、在主目录创建model.py，blog/model.py

import web
import datetime
#数据库连接
db = web.database(dbn = \'MySQL\', db = \'test\', user = \'root\', pw = \'123456\')
#获取所有文章
def get_posts():
  return db.select(\'entries\', order = \'id DESC\')
  
#获取文章内容
def get_post(id):
  try:
    return db.select(\'entries\', where = \'id=$id\', vars = locals())[0]
  except IndexError:
    return None
#新建文章
def new_post(title, text):
  db.insert(\'entries\',
    title = title,
    content = text,
    posted_on = datetime.datetime.utcnow())
#删除文章
def del_post(id):
  db.delete(\'entries\', where = \'id = $id\', vars = locals())
  
#修改文章
def update_post(id, title, text):
  db.update(\'entries\',
    where = \'id = $id\',
    vars = locals(),
    title = title,
    content = text)

5、在模板目录依次创建：base.html、edit.html、index.html、new.html、view.html

$def with (page)

  
    
    
  
  
  
    

      
Home
      $if cookie().get(\'username\'):
        
New Post
    
    
    $:page
  



$def with (post, form)
Edit $form.d.title

  $:form.render()

Delete post

  



$def with (posts, login_form)
Blog posts
$if not cookie().get(\'username\'):
  

  $:login_form.render()
  
$else:
  Welcome $cookie().get(\'username\')!Logout

  $for post in posts:
    

      $post.title
      on $post.posted_on
      $if cookie().get(\'username\'):
        Edit
        Del
    



$def with (form)
New Blog Post

$:form.render()



$def with (post)
$post.title
$post.posted_on

$post.content

6、进入主目录在命令行下运行：python blog.py，将启动web服务，在浏览器输入：http://localhost:8080/，简易博客即已完成。