http://code.activestate.com/recipes/tags/meta:requires=sys/top/2014-09-06T10:35:54-07:00ActiveState Code Recipes2009-05-26T22:44:39-07:00Raymond Hettingerhttp://code.activestate.com/recipes/users/178123/http://code.activestate.com/recipes/500261-named-tuples/

<p style="color: grey"> Python recipe 500261 by <a href="/recipes/users/178123/">Raymond Hettinger</a> (<a href="/recipes/tags/shortcuts/">shortcuts</a>). Revision 15. </p> <p>Fast, lightweight attribute-style access to tuples.</p>

2005-10-03T16:49:09-07:00Chad J. Schroederhttp://code.activestate.com/recipes/users/1760491/http://code.activestate.com/recipes/278731-creating-a-daemon-the-python-way/

<p style="color: grey"> Python recipe 278731 by <a href="/recipes/users/1760491/">Chad J. Schroeder</a> (<a href="/recipes/tags/threads/">threads</a>). Revision 6. </p> <p>The Python way to detach a process from the controlling terminal and run it in the background as a daemon.</p>

2006-12-01T17:30:02-08:00Josiah Carlsonhttp://code.activestate.com/recipes/users/1241800/http://code.activestate.com/recipes/440554-module-to-allow-asynchronous-subprocess-use-on-win/

<p style="color: grey"> Python recipe 440554 by <a href="/recipes/users/1241800/">Josiah Carlson</a> (<a href="/recipes/tags/sysadmin/">sysadmin</a>). Revision 10. </p> <p>The 'subprocess' module in Python 2.4 has made creating and accessing subprocess streams in Python relatively convenient for all supported platforms, but what if you want to interact with the started subprocess? That is, what if you want to send a command, read the response, and send a new command based on that response?</p> <p>Now there is a solution. The included subprocess.Popen subclass adds three new commonly used methods: recv(maxsize=None), recv_err(maxsize=None), and send(input), along with a utility method: send_recv(input='', maxsize=None).</p> <p>recv() and recv_err() both read at most maxsize bytes from the started subprocess. send() sends strings to the started subprocess. send_recv() will send the provided input, and read up to maxsize bytes from both stdout and stderr.</p> <p>If any of the pipes are closed, the attributes for those pipes will be set to None, and the methods will return None.</p> <p>v. 1.3 fixed a few bugs relating to *nix support v. 1.4,5 fixed initialization on all platforms, a few bugs relating to Windows support, added two utility functions, and added an example of how to use this module. v. 1.6 fixed linux _recv() and test initialization thanks to Yuri Takhteyev at Stanford. v. 1.7 removed _setup() and __init__() and fixed subprocess unittests thanks to Antonio Valentino. Added 4th argument 'tr' to recv_some(), which is, approximately, the number of times it will attempt to recieve data. Added 5th argument 'stderr' to recv_some(), where when true, will recieve from stderr. Cleaned up some pipe closing. v. 1.8 Fixed missing self. parameter in non-windows _recv method thanks to comment. v. 1.9 Fixed fcntl calls for closed handles.</p>

2001-07-17T03:24:20-07:00Alex Martellihttp://code.activestate.com/recipes/users/97991/http://code.activestate.com/recipes/66062-determining-current-function-name/

<p style="color: grey"> Python recipe 66062 by <a href="/recipes/users/97991/">Alex Martelli</a> . </p> <p>You want to determine the name of the currently running function, e.g. to create error messages that don't need to be changed when copied to other functions. Function _getframe of module sys does this and much more.</p>

2001-07-10T14:01:38-07:00Jürgen Hermannhttp://code.activestate.com/recipes/users/98061/http://code.activestate.com/recipes/66012-fork-a-daemon-process-on-unix/

<p style="color: grey"> Python recipe 66012 by <a href="/recipes/users/98061/">Jürgen Hermann</a> (<a href="/recipes/tags/threads/">threads</a>). </p> <p>Forking a daemon on Unix requires a certain sequence of system calls. Since Python exposes a full POSIX interface, this can be done in Python, too.</p>

2014-09-06T10:35:54-07:00Louis RIVIEREhttp://code.activestate.com/recipes/users/4035877/http://code.activestate.com/recipes/551780-win-services-helper/

<p style="color: grey"> Python recipe 551780 by <a href="/recipes/users/4035877/">Louis RIVIERE</a> (<a href="/recipes/tags/services/">services</a>, <a href="/recipes/tags/system/">system</a>, <a href="/recipes/tags/windows/">windows</a>). Revision 4. </p> <p>A simple way to implement Windows Service.</p>

2006-03-27T19:20:16-08:00Edward Loperhttp://code.activestate.com/recipes/users/2637812/http://code.activestate.com/recipes/475116-using-terminfo-for-portable-color-output-cursor-co/

<p style="color: grey"> Python recipe 475116 by <a href="/recipes/users/2637812/">Edward Loper</a> (<a href="/recipes/tags/text/">text</a>). Revision 3. </p> <p>The curses module defines several functions (based on terminfo) that can be used to perform lightweight cursor control &amp; output formatting (color, bold, etc). These can be used without invoking curses mode (curses.initwin) or using any of the more heavy-weight curses functionality. This recipe defines a TerminalController class, which can make portable output formatting very simple. Formatting modes that are not supported by the terminal are simply omitted.</p>

2012-11-23T23:57:31-08:00Raymond Hettingerhttp://code.activestate.com/recipes/users/178123/http://code.activestate.com/recipes/577504-compute-memory-footprint-of-an-object-and-its-cont/

<p style="color: grey"> Python recipe 577504 by <a href="/recipes/users/178123/">Raymond Hettinger</a> (<a href="/recipes/tags/memory/">memory</a>, <a href="/recipes/tags/sizeof/">sizeof</a>). Revision 3. </p> <p>Recursive version sys.getsizeof(). Extendable with custom handlers.</p>

2009-04-07T19:47:08-07:00Raymond Hettingerhttp://code.activestate.com/recipes/users/178123/http://code.activestate.com/recipes/572194-lightweight-unittester/

<p style="color: grey"> Python recipe 572194 by <a href="/recipes/users/178123/">Raymond Hettinger</a> (<a href="/recipes/tags/debugging/">debugging</a>). Revision 4. </p> <p>Inspired by py.test, the unittester is a single, simple function that is easily customized. The main virtue is that tests are much clearer than with the unittest.py.</p>

2006-02-26T15:02:54-08:00Crutcher Dunnavanthttp://code.activestate.com/recipes/users/2792865/http://code.activestate.com/recipes/474088-tail-call-optimization-decorator/

<p style="color: grey"> Python recipe 474088 by <a href="/recipes/users/2792865/">Crutcher Dunnavant</a> (<a href="/recipes/tags/algorithms/">algorithms</a>). </p> <p>This decorator implements tail call optimization through stack introspection.</p>

2004-04-18T08:15:21-07:00Michele Simionatohttp://code.activestate.com/recipes/users/1122360/http://code.activestate.com/recipes/278844-parsing-the-command-line/

<p style="color: grey"> Python recipe 278844 by <a href="/recipes/users/1122360/">Michele Simionato</a> (<a href="/recipes/tags/sysadmin/">sysadmin</a>). Revision 2. </p> <p>The module optparse was a great addition to Python 2.3, since it is much more powerful and easier to use than getopt. Using optparse, writing command-line tools is a breeze. However, the power of optparse comes together with a certain verbosity. This recipe allows to use optparse with a minimum of boilerplate, trading flexibility for easy of use. Still, it covers 95% of my common needs, so I think it may be useful to others.</p>

2003-01-07T02:31:32-08:00Danny Yoohttp://code.activestate.com/recipes/users/98032/http://code.activestate.com/recipes/134892-getch-like-unbuffered-character-reading-from-stdin/

<p style="color: grey"> Python recipe 134892 by <a href="/recipes/users/98032/">Danny Yoo</a> (<a href="/recipes/tags/sysadmin/">sysadmin</a>). Revision 2. </p> <p>A small utility class to read single characters from standard input, on both Windows and UNIX systems. It provides a getch() function-like instance.</p>

2001-08-31T15:17:32-07:00Alex Martellihttp://code.activestate.com/recipes/users/97991/http://code.activestate.com/recipes/52305-yet-another-python-templating-utility-yaptu/

<p style="color: grey"> Python recipe 52305 by <a href="/recipes/users/97991/">Alex Martelli</a> (<a href="/recipes/tags/text/">text</a>). Revision 6. </p> <p>"Templating" (copying an input file to output, on the fly inserting Python expressions and statements) is a frequent need, and YAPTU is a small but complete Python module for that; expressions and statements are identified by arbitrary user-chosen regular-rexpressions.</p>

2012-04-11T06:21:18-07:00Raymond Hettingerhttp://code.activestate.com/recipes/users/178123/http://code.activestate.com/recipes/578091-simple-tool-for-simulating-classes-using-closures-/

<p style="color: grey"> Python recipe 578091 by <a href="/recipes/users/178123/">Raymond Hettinger</a> (<a href="/recipes/tags/closure/">closure</a>, <a href="/recipes/tags/object/">object</a>, <a href="/recipes/tags/oriented/">oriented</a>). Revision 9. </p> <p>Closured-based alternative to normal classes. Allows a faster, cleaner coding style at the expense of some functionality.</p>

2005-10-19T08:13:27-07:00Cliff Wellshttp://code.activestate.com/recipes/users/2631558/http://code.activestate.com/recipes/442459-email-pretty-tracebacks-to-yourself-or-someone-you/

<p style="color: grey"> Python recipe 442459 by <a href="/recipes/users/2631558/">Cliff Wells</a> (<a href="/recipes/tags/debugging/">debugging</a>). </p> <p>Even production applications have bugs, and it would be nice to have Python tracebacks emailed to you rather than dumped to the hapless user's screen. This recipe shows you how.</p>

2006-03-30T14:50:24-08:00Graham Fawcetthttp://code.activestate.com/recipes/users/108898/http://code.activestate.com/recipes/437932-pyline-a-grep-like-sed-like-command-line-tool/

<p style="color: grey"> Python recipe 437932 by <a href="/recipes/users/108898/">Graham Fawcett</a> (<a href="/recipes/tags/sysadmin/">sysadmin</a>). Revision 3. </p> <p>This utility was born from the fact that I keep forgetting how to use "sed", and I suck at Perl. It brings ad-hoc command-line piping sensibilities to the Python interpeter. (Version 1.2 does better outputting of list-like results, thanks to Mark Eichin.)</p>

2009-04-29T07:28:14-07:00Raymond Hettingerhttp://code.activestate.com/recipes/users/178123/http://code.activestate.com/recipes/362715-dbf-reader-and-writer/

<p style="color: grey"> Python recipe 362715 by <a href="/recipes/users/178123/">Raymond Hettinger</a> (<a href="/recipes/tags/database/">database</a>). Revision 7. </p> <p>Reader iterates over records in Dbase or Xbase files. Writer creates dbf files from Python sequences.</p>

2008-07-25T20:01:50-07:00Gary Eakinshttp://code.activestate.com/recipes/users/470921/http://code.activestate.com/recipes/208699-calling-windows-api-using-ctypes-and-win32con/

<p style="color: grey"> Python recipe 208699 by <a href="/recipes/users/470921/">Gary Eakins</a> (<a href="/recipes/tags/ctypes/">ctypes</a>, <a href="/recipes/tags/windows_api/">windows_api</a>). Revision 4. </p> <p>It is easy to call Windows API dlls using the ctypes module with win32con defining the constant values for message identifiers and parameter flags. The demo code shows a simple but complete application that registers a window class and a Python WndProc callback function, creates the window and pumps messages.</p>

2003-06-13T21:22:18-07:00Simon Burtonhttp://code.activestate.com/recipes/users/860809/http://code.activestate.com/recipes/205451-povray-for-python/

<p style="color: grey"> Python recipe 205451 by <a href="/recipes/users/860809/">Simon Burton</a> (<a href="/recipes/tags/graphics/">graphics</a>). </p> <p>Here is a relatively simple framework for making povray files from your favourite programming language, python. It's good for creating structured/mathematical scenes and animations.</p>

2007-12-05T01:25:49-08:00Noah Spurrierhttp://code.activestate.com/recipes/users/103276/http://code.activestate.com/recipes/146262-finite-state-machine-fsm/

<p style="color: grey"> Python recipe 146262 by <a href="/recipes/users/103276/">Noah Spurrier</a> (<a href="/recipes/tags/algorithms/">algorithms</a>). Revision 2. </p> <p>This recipe shows a Finite State Machine (FSM) that can be used for small parsing tasks. The code is quite simple. The bulk of it is comments. In addition to state this FSM also maintains a user defined "memory". So this FSM is a Push-down Automata (PDA) since a PDA is a FSM + memory. This module contains an example function that demonstrates a simple RPN expression evaluator.</p>