Open or not open, that is the stupid question.

Good article for Perl programmer from 5 to 6. http://perlgeek.de/en/article/5-to-6 Wi sh this helps. regards, Stanley Huang

When you have a int array and you want to concatenate them into a string. You might use this syntax, and python return you the TypeError. >>> a=[1,2,3] >>> print ' '.join(a) Traceback (most recent call last):   File " ", line 1, in ? TypeError: sequence item 0: expected string, int found How could we solve this problem? 1. Use a generator expression: >>> print ' '.join(str(i) for i in a) 1 2 3 >>> 2. Use imap method from itertools >>> from itertools import imap >>> print ' '.join(imap(str, a)) 1 2 3 >>> Wish this helps. regards, Stanley Huang

Just got this information for the internet. It's a good reference. Recovering an InnoDB table from only an .ibd file. Wish this helps. regards, Stanley Huang

How to use cmd module to create python cli program? Please refer to the following sample: $ cat ./cli.py #!/usr/bin/python import os, sys from menu.CLI_main import CLI_main ###################################### main if __name__ == '__main__':     cli=main("user","host")     cli.cmdloop() $ $ cat ./main.py  import cmd class main(cmd.Cmd):     def __init__(self, user, host):         cmd.Cmd.__init__(self)         self.user = user         self.host = host         self.prompt = "%s@%s:%s> " % (user, host, "main")     def do_system(self, args):         from system import system         sub_cmd = system(self.user, host)         sub_cmd.cmdloop()     def help_system(self):         print "system sub menu of cli"     def do_show(self, args):         print "show"     def do_quit(self, args):         return True $ $ cat ./system.py import cmd class system(cmd.Cmd):     def __init__(self, user, host):

How to refactory your single pyhon file with multi module files? 1. create folder for modules. 2. create empty __init__.py in the folder. 3. move partial your code into the new folder. 4. add import syntax into your main program. 5. test it. 6. done. e.g. Before refactoring: $ cat ./t.py #!/usr/bin/python class a():   def a(self):     print "call a()" class b():   def b(self):     print "call b()" if __name__ == '__main__':   c=a()   c.a()   d=b()   d.b() After refactoring: $ ls -al total 8 drwxr-xr-x   5 root  root  170 Dec 20 23:14 . drwxrwxrwt  16 root     root  544 Dec 20 23:17 .. drwxr-xr-x   6 root  root  204 Dec 20 23:13 a drwxr-xr-x   6 root  root  204 Dec 20 23:13 b -rwxr--r--   1 root  root  119 Dec 20 23:14 t.py $ $ ls a __init__.py    __init__.pyc    a.py        a.pyc $ $ ls b __init__.py    __init__.pyc    b.py        b.pyc $ $ cat ./t.py #!/usr/bin/python from a.a import a from b.b import b if __name__ == '__main_

Just use ifconfig and assign a ip to logical interface name. Ex. # ifconfig eth0:1 192.168.1.101 netmask 255.255.255.0 Wish this helps. regards, Stanley Huang

A good tool for mp3 editor called " audacity ". How to install it in Ubuntu? # apt-get install audacity # audacity Wish this helps. regards, Stanley Huang