Python:FriendFeed的Tornado Web Server
代码很简单，不到5k行。但是思路挺好的，改成non-blocking了之后效率就是能提高不少，特别是考虑到现代的web app都需要和其他的
HTTP服务器通信，blocking的代价太大了。 Tornado is an open source version of the scalable, non-blocking web server and tools that power FriendFeed. The FriendFeed application is written using a web framework that looks a bit like web.py or Google's webapp, but with additional tools and optimizations to take advantage of the underlying non-blocking infrastructure.
The framework is distinct from most mainstream web server frameworks (and certainly most Python frameworks) because it is non-blocking and reasonably fast. Because it is non-blocking and uses epoll, it can handle thousands of simultaneous standing connections, which means it is ideal for real-time web services. We built the web server specifically to handle FriendFeed's real-time features — every active user of FriendFeed maintains an open connection to the FriendFeed servers. (For more information on scaling servers to support thousands of clients, see The C10K problem.)
See the Tornado documentation for a detailed walkthrough of the framework. Tornado: Facebook Releases Python Framework as Open Source http://www.linux-magazine.com/Online/News/Tornado-Facebook-Releases-Python-Framework-as-Open-Source
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放原始代码
import serial
ser = serial.Serial('com3',baudrate=115200, bytesize=8,parity='N', stopbits=1,xonxoff=0, timeout=1)
while( True ):
a = ser.read(100)
print a
用完需要ser.close()，否则其� ......
import time,thread
def test(a,b):
for i in range(a,b):
time.sleep(1)
print i
def start():
thread.start_new_thread(test,(1,1001))
thread.start_new_thread(test,(1000,2001))
if __name__=='__main__':
start()
......
1. Basic
参考《Python正则表达式操作指南》
模块re，perl风格的正则表达式
regex并不能解决所有的问题，有时候还是需要代码
regex基于确定性和非确定性有限自动机
2. 字符匹配(循序渐进)
元字符
. ^ $ * + ? { [ ] \ | ( )
1) "[" 和 "]"常用来指定一个字符类别，所谓字符类别就是你想匹配的一个字符集。如[ ......
djangoproject python 3 prog python code http://wiki.python.org/moin/WebBrowserProgramming http://wiki.woodpecker.org.cn/moin/ http://www.okpython.com/viewlist-fid-5.html http://zh.wikipedia.org/wiki/CPython django doc douban ibm python doc ibm python zope http://www.czug.org/ http://www.apolov ......
