Open or not open, that is the stupid question.

Days ago, I discussed the coding style of python, and I use one example to present what I want you to know. The most 2 ways to use of renaming a file are: 1. Use rename method os moudle [ os.rename(f1, f2) ], 2. Use external command by popen method[ os.popen('mv f1 f2') ]. Some people might think there are not much different between these two ways. But after a stress test, you will realize it did has different between these two ways. The sample code and test run are as the following. #!/bin/env python import os, sys from time import gmtime, strftime n = 10000 f1 = '/1' f2 = '/2' os.popen('touch %s' % f1).read() print strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime()) for i in range(n): if os.path.exists(f1): os.rename(f1, f2) else: os.rename(f2, f1) print strftime("%a, %d %b %Y %H:%M:%S +0000", gmtime()) for i in range(n): if os.path.exists(f1): os.popen('mv %s %s' % (f1, f2))...

Python performance tips. http://wiki.python.org/moin/PythonSpeed http://wiki.python.org/moin/PythonSpeed/PerformanceTips Wish this helps. regards, Stanley Huang

#!/bin/env python import sys print sys.version # python -c 'import sys; print sys.version' 2.6.5 (r265:79063, Apr 16 2010, 13:57:41) [GCC 4.4.3] Wish this helps. regards, Stanley Huang

If you want to allow using symbolic link in tomcat, you could add and attribute called "context" with an key "allowLinking" eg. <Context path="/myapp" allowLinking="true"/> and I wrote a sample python code to do this. #!/bin/env python import os,sys from xml.dom import minidom def getXMLDom(FILE): return minidom.parse(open(FILE,'r')) def saveXML(FILE, dom): fd = open(FILE, 'w') fd.write(dom.toxml()) fd.close() def appendElement(FILE, base_element_name, element_name, attr_key_val, element_index=0, backup_flag='y'): if backup_flag == 'y': backupConfigFile(FILE) dom = getXMLDom(FILE) e = dom.createElement(element_name) for attr, val in attr_key_val: e.setAttribute(attr, val) dom.getElementsByTagName(base_element_name)[element_index].appendChild(e) saveXML(FILE, dom) xmlFile = prefix+'/opt/ruckuswireless/3rdparty/tomcat/conf/server.xml' base_element_...