http://code.activestate.com/recipes/tags/meta:loc=94/2016-03-23T14:14:26-07:00ActiveState Code Recipes2016-03-23T14:14:26-07:00Steven D'Apranohttp://code.activestate.com/recipes/users/4172944/http://code.activestate.com/recipes/579097-safely-and-atomically-write-to-a-file/

<p style="color: grey"> Python recipe 579097 by <a href="/recipes/users/4172944/">Steven D'Aprano</a> (<a href="/recipes/tags/atomic/">atomic</a>, <a href="/recipes/tags/file/">file</a>, <a href="/recipes/tags/save/">save</a>). Revision 3. </p> <p>Saving the user's data is risky. If you write to a file directly, and an error occurs during the write, you may corrupt the file and lose the user's data. One approach to prevent this is to write to a temporary file, then only when you know the file has been written successfully, over-write the original. This function returns a context manager which can make this more convenient.</p> <p>Update: this now uses <code>os.replace</code> when available, and hopefully will work better on Windows.</p>

2014-03-31T18:39:16-07:00Fabian Mayerhttp://code.activestate.com/recipes/users/4189629/http://code.activestate.com/recipes/578858-convert-doc-and-docx-files-to-pdf/

<p style="color: grey"> Python recipe 578858 by <a href="/recipes/users/4189629/">Fabian Mayer</a> (<a href="/recipes/tags/doc/">doc</a>, <a href="/recipes/tags/pdf/">pdf</a>, <a href="/recipes/tags/python/">python</a>, <a href="/recipes/tags/win32com/">win32com</a>). Revision 2. </p> <p>The Script converts all doc and docx files in a specified folder to pdf files. It checks whether the provided absolute path does actually exist and whether the specified folder contains any doc and docx files. It does not travers the directory recursively. The script is not portable and runs only a Windows machine. Based on the experience I made, I recommend closing MS Word before running the script.</p>

2013-12-27T05:10:12-08:00Pawel Olejnikhttp://code.activestate.com/recipes/users/4188852/http://code.activestate.com/recipes/578799-numerical-inversion-of-the-laplace-transform-with-/

<p style="color: grey"> Python recipe 578799 by <a href="/recipes/users/4188852/">Pawel Olejnik</a> (<a href="/recipes/tags/analysis/">analysis</a>, <a href="/recipes/tags/mpmath/">mpmath</a>, <a href="/recipes/tags/numerical/">numerical</a>). </p> <p>This Recipe is a variant of <a href="http://code.activestate.com/recipes/576934/">recipe 576934</a>: Numerical Inversion of the Laplace Transform using the Talbot method by Fernando Damian Nieuwveldt adapted to high precision mpmath</p>

2013-01-29T22:07:57-08:00Barry Walkerhttp://code.activestate.com/recipes/users/4177147/http://code.activestate.com/recipes/578441-a-building-block-bash-binary-file-manipulation/

<p style="color: grey"> Bash recipe 578441 by <a href="/recipes/users/4177147/">Barry Walker</a> (<a href="/recipes/tags/apple/">apple</a>, <a href="/recipes/tags/bash/">bash</a>, <a href="/recipes/tags/binary/">binary</a>, <a href="/recipes/tags/linux/">linux</a>, <a href="/recipes/tags/macbook_pro/">macbook_pro</a>, <a href="/recipes/tags/script/">script</a>, <a href="/recipes/tags/shell/">shell</a>). Revision 2. </p> <p>Apologies for any typos, and IF this has been done before...</p> <p>The code generates a 256 byte binary file of _characters_ 0x00 to 0xFF for general usage and generates another binary file manipulated in a basic way.</p> <p>The for loops in the code are purely for DEMO purposes only.</p> <p>This is Public Domain and you may do with it as you please. I have uploaded it elsewhere too...</p> <p>Watch for wordwrapping, etc and read the code for more information...</p> <p>Enjoy finding simple solutions to often very difficult problems...</p> <p>Bazza, G0LCU...</p>

2012-11-12T20:59:54-08:00Hirohttp://code.activestate.com/recipes/users/4184239/http://code.activestate.com/recipes/578324-xdiff-in-python/

<p style="color: grey"> Python recipe 578324 by <a href="/recipes/users/4184239/">Hiro</a> (<a href="/recipes/tags/file/">file</a>, <a href="/recipes/tags/process/">process</a>). Revision 2. </p> <p>xdiff.py compares and output difference of file1 and file2. it finds out the lines that are unique in file1 and files2, the finding is written to file3 and file4 respectively.</p>

2012-07-09T20:56:22-07:00commentator8http://code.activestate.com/recipes/users/4182761/http://code.activestate.com/recipes/578200-set-windows-7-to-lock-itself-upon-timeout-if-no-in/

<p style="color: grey"> Python recipe 578200 by <a href="/recipes/users/4182761/">commentator8</a> (<a href="/recipes/tags/lock/">lock</a>, <a href="/recipes/tags/password/">password</a>, <a href="/recipes/tags/python/">python</a>, <a href="/recipes/tags/windows/">windows</a>, <a href="/recipes/tags/windows_registry/">windows_registry</a>). Revision 2. </p> <p>This script (or exe if using web2py with """setup(windows=['locker2.py']))""") can be run as a task in windows every x minutes and will test for the presence of an internet connection and depending on whether it is found will set windows to lock after a given timeout without user activity.</p> <p>This was made with help from random code snippets from around the web.</p> <p>Tested only on windows 7.</p>

2011-02-09T13:29:56-08:00Stephen Chappellhttp://code.activestate.com/recipes/users/2608421/http://code.activestate.com/recipes/577566-directory-size-console/

<p style="color: grey"> Python recipe 577566 by <a href="/recipes/users/2608421/">Stephen Chappell</a> (<a href="/recipes/tags/commandline/">commandline</a>, <a href="/recipes/tags/directory/">directory</a>, <a href="/recipes/tags/sizeof/">sizeof</a>, <a href="/recipes/tags/tree/">tree</a>). </p> <p>Have you ever wanted to find out how much room a particular directory was taking up on your hard drive? A roommate of mine in college was having trouble keeping track of where his hard drive space is going, so the following program provided a solution that allows a brief overview of a directory's size along with all of its children. A tree view is printed out in ASCII characters showing the relationship of each directory along with its size in a format easily readable to humans. The output can always be redirected to a text file if it needs to be saved for viewing later on.</p>

2010-02-20T08:22:00-08:00Raymond Hettingerhttp://code.activestate.com/recipes/users/178123/http://code.activestate.com/recipes/577059-running-median/

<p style="color: grey"> Python recipe 577059 by <a href="/recipes/users/178123/">Raymond Hettinger</a> (<a href="/recipes/tags/median/">median</a>). </p> <p>Maintains sorted data as new elements are added and old one removed as a sliding window advances over a stream of data. Running time per median calculation is proportional to the square-root of the window size.</p>

2009-10-27T01:48:22-07:00Dieter Kadelkahttp://code.activestate.com/recipes/users/4172107/http://code.activestate.com/recipes/576938-numerical-inversion-of-the-laplace-transform-with-/

<p style="color: grey"> Python recipe 576938 by <a href="/recipes/users/4172107/">Dieter Kadelka</a> (<a href="/recipes/tags/analysis/">analysis</a>, <a href="/recipes/tags/mpmath/">mpmath</a>, <a href="/recipes/tags/numerical/">numerical</a>). </p> <p>This Recipe is a variant of <a href="http://code.activestate.com/recipes/576934/">recipe 576934</a>: Numerical Inversion of the Laplace Transform using the Talbot method by Fernando Damian Nieuwveldt adapted to high precision mpmath</p>

2008-11-30T05:42:59-08:00Louis RIVIEREhttp://code.activestate.com/recipes/users/4035877/http://code.activestate.com/recipes/576576-thread-pool/

<p style="color: grey"> Python recipe 576576 by <a href="/recipes/users/4035877/">Louis RIVIERE</a> (<a href="/recipes/tags/design_pattern/">design_pattern</a>, <a href="/recipes/tags/pool/">pool</a>, <a href="/recipes/tags/threads/">threads</a>, <a href="/recipes/tags/thread_pool/">thread_pool</a>). Revision 4. </p> <p>Easy to use Thread Pool with a dynamically adjustable pool size.</p>

2008-05-20T10:36:50-07:00Oren Tiroshhttp://code.activestate.com/recipes/users/2033964/http://code.activestate.com/recipes/572213-pickle-the-interactive-interpreter-state/

<p style="color: grey"> Python recipe 572213 by <a href="/recipes/users/2033964/">Oren Tirosh</a> (<a href="/recipes/tags/sysadmin/">sysadmin</a>). Revision 2. </p> <p>This code extends the pickle module to enable pickling of functions and classes defined interactively at the command prompt. You can save the interpreter state by pickling the __main__ module and restore it later.</p>

2007-03-25T03:23:31-07:00kay schluehrhttp://code.activestate.com/recipes/users/2398921/http://code.activestate.com/recipes/498264-reduce-as-a-generator/

<p style="color: grey"> Python recipe 498264 by <a href="/recipes/users/2398921/">kay schluehr</a> (<a href="/recipes/tags/algorithms/">algorithms</a>). Revision 4. </p> <p>In this recipe the builtin function reduce is generalized to a Python 2.5 style generator called greduce. The generator never stops and can be used to create an infinite stream of values by means of the generators send() method.</p>

2006-02-06T12:10:55-08:00Catalin Constantinhttp://code.activestate.com/recipes/users/2766393/http://code.activestate.com/recipes/473851-compose-html-mail-with-embedded-images-from-url-or/

<p style="color: grey"> Python recipe 473851 by <a href="/recipes/users/2766393/">Catalin Constantin</a> . </p> <p>The thing about this class is to "build" a mail msg object, automatic, from an URL or a local html file WITH all images included. The class takes care of the image parsing / downloading / embedding + "cid: ID-here" replacements. The return is a valid MIMEMultipart("related") msg object which can be used to send valid HTML mail.</p>

2006-03-20T23:23:53-08:00Guang Shen Huanghttp://code.activestate.com/recipes/users/2804722/http://code.activestate.com/recipes/474124-permutation-and-combination-enumerator/

<p style="color: grey"> Python recipe 474124 by <a href="/recipes/users/2804722/">Guang Shen Huang</a> (<a href="/recipes/tags/algorithms/">algorithms</a>). Revision 2. </p> <p>The usaual way to solve these problem is to inflate a huge list, thus it need a lot of memory. These two enumerator take a different approach. It use a linklist to imitate permutations, a binary tree to imitate combination. Thus the program can spit out the result one by one.</p>

2005-04-06T06:29:14-07:00Anandhttp://code.activestate.com/recipes/users/760763/http://code.activestate.com/recipes/408995-a-general-purpose-file-iterator-class/

<p style="color: grey"> Python recipe 408995 by <a href="/recipes/users/760763/">Anand</a> (<a href="/recipes/tags/files/">files</a>). </p> <p>This recipe presents a general purpose file object iterator cum file object proxy class. It provides a class that gives several iterator functions to read a text file by characters, words, lines, paragraphs or blocks. It also acts as a proxy for the wrapped file object.</p>

2004-10-26T13:58:15-07:00Mark Johnstonhttp://code.activestate.com/recipes/users/2119626/http://code.activestate.com/recipes/325204-passwd-file-compatible-1-md5-crypt/

<p style="color: grey"> Python recipe 325204 by <a href="/recipes/users/2119626/">Mark Johnston</a> (<a href="/recipes/tags/sysadmin/">sysadmin</a>). </p> <p>A port of Poul-Henning Kamp's MD5 password hash routine, as initially found in FreeBSD 2. It is also used in Cisco routers, Apache htpasswd files, and other places that you find "$1$" at the beginning of password hashes.</p>

2004-05-10T11:54:01-07:00Simon Brunninghttp://code.activestate.com/recipes/users/98010/http://code.activestate.com/recipes/279004-parsing-a-uk-postcode/

<p style="color: grey"> Python recipe 279004 by <a href="/recipes/users/98010/">Simon Brunning</a> (<a href="/recipes/tags/text/">text</a>). Revision 3. </p> <p>This function will split and (optionally) validate UK postcodes.</p>

2003-01-10T19:38:17-08:00Alex Naanouhttp://code.activestate.com/recipes/users/104183/http://code.activestate.com/recipes/173217-a-fun-litle-tree-class/

<p style="color: grey"> Python recipe 173217 by <a href="/recipes/users/104183/">Alex Naanou</a> . Revision 2. </p> <p>this recipe describes a tree backbone class that supports two modes of iteration and topological comparison. and it has a nice node access inteface.</p>

2001-09-11T03:13:07-07:00Donal Fellowshttp://code.activestate.com/recipes/users/99497/http://code.activestate.com/recipes/68396-try-catch-finally/

<p style="color: grey"> Tcl recipe 68396 by <a href="/recipes/users/99497/">Donal Fellows</a> . </p> <p>The Java try ... catch ... finally construct is really nice for those cases when you want to guarantee to always release a resource (particularly a file handle) even if the code generates an exception. It is also very useful to be able to use different types of error handling depending on the error that occurred. This code implements such a facility in pure Tcl.</p>