update readme

README.md

 pyspider [![Build Status](https://travis-ci.org/binux/pyspider.png?branch=master)](https://travis-ci.org/binux/pyspider) [![Coverage Status](https://coveralls.io/repos/binux/pyspider/badge.png)](https://coveralls.io/r/binux/pyspider)
 ========
 
-A spider system in python. [Try It Now!](http://demo.pyspider.org/)
+A Powerful Spider System in Python. [Try It Now!](http://demo.pyspider.org/)
 
-- Write script with python
-- Web script editor, debugger, task monitor, project manager and result viewer
+- Write script in python with powerful API
+- Powerful WebUI with script editor, task monitor, project manager and result viewer
+- MySQL, MongoDB, SQLite as database backend 
+- Javascript pages supported!
+- Task priority, retry, periodical and recrawl by age or marks in index page (like update time)
 - Distributed architecture
-- MySQL, MongoDB and SQLite as database backend 
-- Full control of crawl process with powerful API
-- Javascript pages Support! (with phantomjs fetcher)
 
 
-![debug demo](http://f.binux.me/debug_demo.png)
-demo code: [gist:9424801](https://gist.github.com/binux/9424801)
+Sample Code:
+
+```python
+from libs.base_handler import *
+
+class Handler(BaseHandler):
+    '''
+    this is a sample handler
+    '''
+    @every(minutes=24*60, seconds=0)
+    def on_start(self):
+        self.crawl('http://scrapy.org/', callback=self.index_page)
+
+    @config(age=10*24*60*60)
+    def index_page(self, response):
+        for each in response.doc('a[href^="http://"]').items():
+            self.crawl(each.attr.href, callback=self.detail_page)
+
+    def detail_page(self, response):
+        return {
+                "url": response.url,
+                "title": response.doc('title').text(),
+                }
+```
+
+[![demo](http://ww1.sinaimg.cn/large/7d46d69fjw1emavy6e9gij21kw0uldvy.jpg)](http://demo.pyspider.org/)
 
 Installation
 ============
 
 * python2.6/2.7
-* `pip install -r requirements.txt`
+* `pip install --allow-all-external -r requirements.txt`
 * `./run.py` , visit [http://localhost:5000/](http://localhost:5000/)
 
-Docker
-======
+if ubuntu: `apt-get install python python-dev python-distribute python-pip libcurl4-openssl-dev libxml2-dev libxslt1-dev python-lxml`
 
-```
-# mysql
-docker run -it -d --name mysql dockerfile/mysql
-# rabbitmq
-docker run -it -d --name rabbitmq dockerfile/rabbitmq
-# phantomjs link to fetcher and webui
-docker run --name phantomjs -it -d -v `pwd`:/mnt/test --expose 25555 cmfatih/phantomjs /usr/bin/phantomjs /mnt/test/fetcher/phantomjs_fetcher.js 25555
-
-# scheduler
-docker run -it -d --name scheduler --link mysql:mysql --link rabbitmq:rabbitmq binux/pyspider scheduler
-# fetcher, run multiple instance if needed.
-docker run -it -d -m 64m --link rabbitmq:rabbitmq binux/pyspider fetcher
-# processor, run multiple instance if needed.
-docker run -it -d -m 128m --link mysql:mysql --link rabbitmq:rabbitmq binux/pyspider processor
-# webui
-docker run -it -d -p 5000:5000 --link mysql:mysql --link rabbitmq:rabbitmq --link scheduler:scheduler binux/pyspider webui
-```
+or [Run with Docker](https://github.com/binux/pyspider/wiki/Run-pyspider-with-Docker)
 
 Documents
 =========
@@ -53,8 +60,8 @@ Documents
 Contribute
 ==========
 
-* 部署使用，提交 bug、特性 [Issue](https://github.com/binux/pyspider/issues)
-* 参与 [特性讨论](https://github.com/binux/pyspider/issues?labels=discussion&state=open) 或 [完善文档](https://github.com/binux/pyspider/wiki)
+* Use It, Open [Issue](https://github.com/binux/pyspider/issues), PR is welcome.
+* [Discuss](https://github.com/binux/pyspider/issues?labels=discussion&state=open) [Document](https://github.com/binux/pyspider/wiki)
 
 
 License

libs/sample_handler.py

@@ -3,7 +3,6 @@
 # vim: set et sw=4 ts=4 sts=4 ff=unix fenc=utf8:
 # Created on __DATE__
 
-from libs.pprint import pprint
 from libs.base_handler import *
 
 class Handler(BaseHandler):
@@ -12,7 +11,7 @@ class Handler(BaseHandler):
     '''
     @every(minutes=24*60, seconds=0)
     def on_start(self):
-        self.crawl('http://www.baidu.com/', callback=self.index_page)
+        self.crawl('http://scrapy.org/', callback=self.index_page)
 
     @config(age=10*24*60*60)
     def index_page(self, response):