python性能增强工具shedskin 0.3版发布
http://code.google.com/p/shedskin/ Shed Skin 0.3 - support for 3 new standard library modules (now about 20 in total): - itertools (jeremie roquet) - heapq (jeremie roquet) - csv (converted using shedskin) - 4 new example programs (now 44 in total!): - maximum weighted matching algorithm (joris van rantwijk) - kanoodle: knuth's dancing links (david austin) - bidirectional dijkstra algorithm (from networkx, uses heapq) - barnes-hut force calculation - improved type inference (scalability, bugfixes, major cleanup) - support for 'map', 'filter', 'reduce' and 'next' - support for 'with' statement (jeremie roquet) - support for 'key' argument of 'sorted' (and 'list.sort') - reorganized codebase, distutils setup.py (thomas spura) - optimized list indexing (joris van rantwijk) - optimized addition of 1-length lists and strings - improved forward referencing of variables/functions - avoid GCC warnings after 'shedskin -e' - support for passing keyword arguments to extension modules - optimized list slicing - ignore blocks surrounded by #{ and #} (mike schrick) - add --makefile option (mike schrick) - several cleanups, removing about 100 lines again - large amount of bugfixes
相关文档：
threading — Higher-level threading interface
This module constructs higher-level threading interfaces on top of the lower level _thread module. See also the queue module.
The dummy_threading module is provided for situations where threading cannot be used because _thread is missing.
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原帖：http://www.cnblogs.com/jingleguo/archive/2008/06/02/1211820.html
当python中间处理非ASCII编码时，经常会出现如下错误：
UnicodeDecodeError: 'ascii' codec can't decode byte 0x?? in position 1: ordinal not in range(128)
0x??是超出128的数字，python在默认的情况下认为语言的编码是ascii编码，所以无法 ......
RRD是Round Robin Database的意思，RRDTool是用来管理RRD的一个工具。RRDTool的主页在这里，Wikipedia的页面在这里。RRD其实就是一个时序数据库，使用一个固定大小的环型buffer，适用于存储一些统计性的信息，如CPU负载呀，气温变化呀。我为什么要说这个东西呢，因为XenServer里的性能统计是用的RRD，你可以访问诸如http:// ......
1.解释性 可以直接从源代码运行程序.在计算机内部,Python解释器把源代码转换成称为字节码的中间形式,然后再把它翻译成计算机使用的机器语言并运行.
2.#符号后面的内容都是注释.
3.在字符串中行末的'\'表示下一行的内容和上一行是接着的;字符串前加一个r表示某些不需要转义符那样的特别处理的字符串;在处理文本文件的时候� ......
转载自：http://purpen.javaeye.com/blog/98095
python 执行系统命令比较
关键字: python os system 系统命令
在此比较一下两种方法执行系统命令的方法,以方便于日后运用:(
1. os.system()
system(command) -> exit_status
Execute the ......
