Pass Javascript arrays to PHP (PHP)

2005-05-16T11:45:33-07:00

PHP recipe 414334 by Noah Spurrier (session).

This is a Javascript function that will convert a Javascript array to a string in PHP serialized format. You can pass this string to a PHP script and easily unserialize it to a PHP array.

Basic threaded Python TCP server (Python)

2012-09-19T17:59:01-07:00

Python recipe 578247 by Luis Martin Gil (python, server, tcp, thread). Revision 3.

TCP provides reliable, ordered delivery of a stream of bytes from a program on one computer to another program on another computer. Sometimes you need a quick deployment of a TCP server and here I bring to you a Python 2.* snippet of a threaded Python server.

Convert Microsot Excel (XLSX) to PDF with Python and xtopdf (Python)

2015-11-22T22:15:25-08:00

Python recipe 579128 by Vasudev Ram (excel, formats, openpyxl, pdf, python, xlsx, xtopdf).

This recipe shows how the basics of to convert the text data in a Microsoft Excel file (XLSX format) to PDF (Portable Document Format). It uses openpyxl to read the XLSX file and xtopdf to generate the PDF file.

Run a task every few seconds (Python)

2001-06-18T04:31:57-07:00

Python recipe 65222 by Itamar Shtull-Trauring (threads).

The TaskThread class allows you to create threads that execute a specific action at a specified interval, by subclassing - just override the task() method. You can also shutdown a TaskThread without having to wait for it to finish "sleeping" (due to the use of threading.Event objects as an alternative to time.sleep()).

Groupby (Python)

2004-02-12T07:05:02-08:00

Python recipe 259173 by Raymond Hettinger (algorithms). Revision 5.

Guido inspired SQL-like GROUPBY class that also encapsulates the logic in a Unix-like "sort | uniq".

thread2 -- killable threads (Python)

2012-08-09T20:14:33-07:00

Python recipe 496960 by tomer filiba (threads).

A little module that extends the threading's module functionality -- allows one thread to raise exceptions in the context of another thread. By raising SystemExit, you can finally kill python threads :)

custom django login_required decorator (Python)

2006-10-24T08:54:07-07:00

Python recipe 498217 by Jian Ding Chen (web). Revision 2.

I found django's auth module is too complex for my needs, instead I wrote a relative simple one, but I miss the login_required decorator in django auth module, so I decide to write a new one.

Automatic delegation as an alternative to inheritance (Python)

2001-04-08T21:03:15-07:00

Python recipe 52295 by Alex Martelli (oop). Revision 2.

Python classes cannot inherit from any type, just from other classes. However, automatic delegation (via __getattr__ and __setattr__) can provide pretty much the same functionality as inheritance (without such limits, and with finer-grained control).

Remove diatrical marks (including accents) from strings using latin alphabets (Python)

2009-02-11T11:40:55-08:00

Python recipe 576648 by Sylvain Fourmanoit (text, text_processing). Revision 7.

Many written languages using latin alphabets employ diacritical marks. Even today, it is still pretty common to encounter situations where it would be desirable to get rid of them: files naming, creation of easy to read URIs, indexing schemes, etc.

An easy way has always been to simply filter out any "decorated characters"; unfortunately, this does not preserve the base, undecorated glyphs. But thanks to Unicode support in Python, it is now straightforward to perform such a transliteration.

(This recipe was completely rewritten based on a comment by Mathieu Clabaut: many thanks to him!)

To 'return None' from your Python-callable C function (Python)

2001-03-26T12:02:44-08:00

Python recipe 52309 by Alex Martelli (extending).

Often a function written in C for Python needs to return nothing in particular -- a "return None" in Python terms; but _don't_ just "return Py_None" from C, as that will mess up reference counts!

Summary reports using itertools.groupby (Python)

2004-09-10T13:20:37-07:00

Python recipe 304162 by Paul Moore (algorithms). Revision 2.

Lists of data grouped by a key value are common - obvious examples are spreadsheets or other tabular arrangements of information. In many cases, the new itertools groupby function introduced in Python 2.4 can provide a means of easily generating summaries of such information.

Keyword Argument Injection with Python Decorators (Python)

2010-09-05T17:06:04-07:00

Python recipe 577382 by Ahmet Emre Aladağ (class, class_decorator, decorator, injection, variable). Revision 2.

In most of the object oriented codes we write, we need to set class attributes to the given argument values and this is a very line-consuming thing. To get over these redundant lines, I found a solution using decorators.

Create an ODBC data source (Python)

2005-05-22T16:48:29-07:00

Python recipe 414879 by Mark Rees (database).

When installing database applications that use ODBC, I wanted to create the required ODBC data sources from my python install script. With the help of the ctypes module, it's simple.

Logging to console .. without surprises (Python)

2009-06-25T13:12:55-07:00

Python recipe 576819 by Sridhar Ratnakumar (logging). Revision 3.

logging.StreamHandler is not the best way to log to console .. as it prints everything to sys.stderr by default. You can configure it to log to sys.stdout .. but that means even error/exception will be printed to sys.stdout.

Copy huge files on Windows avoiding system cache misbehaviour (Python)

2006-05-10T18:06:55-07:00

Python recipe 496694 by Christos Georgiou (files).

This recipe uses pywin32 in order to copy files making use of the win32file.FILE_FLAG_SEQUENTIAL_SCAN, which makes much more efficient use of the system cache (only a few megabytes are consumed instead of caching the whole file).

inline java code into jython (Python)

2004-12-27T12:35:17-08:00

Python recipe 360875 by Ferdinand Jamitzky (jython).

This recipe shows how to insert java code into a jython program. The java code is automatically compiled and the resulting class is imported and returned. Compilation only occurs after a change of the java source.

edge-coloring of a bipartite graph (Python)

2006-09-13T01:29:41-07:00

Python recipe 498092 by Alain Pointdexter (algorithms).

Konig's theorem tells us that every bipartite graph with maximum vertex-degree d can be edge-colored with just d colors. This recipe relies on a previous recipe by D.Eppstein (123641) : "Hopcroft-Karp bipartite matching".

Extending socket.socketpair() to work on Windows (Python)

2007-07-22T22:36:21-07:00

Python recipe 525487 by Bob Ziuchkovski (network).

This recipe wraps socketpair() to provide a standard socket pair on POSIX systems or a pair of connected sockets using ephemeral ports on Windows.

progress_bar.py (Python)

2006-04-30T20:33:49-07:00

Python recipe 492230 by Stephen Chappell (threads).

Progress bars are popular when trying to show how much of a job has been completed. In my case, it was encrypting and decrypting files. A GUI interface was written, but something was lacking. How was the user of the program supposed to know if the program was doing its job? A progress bar seemed like a good answer, so a simple GUI progress bar was written using Tkinter.

Decrypt a PDF using fitz / MuPDF (PyMuPDF) (Python)

2016-03-17T12:22:10-07:00

Python recipe 580627 by Harald Lieder (decompression, decryption, pdf, repair).

It's more a code snippet. Shows how to dynamically check whether a PDF is password protected. If it is, decrypt it and save it back to disk un-encrypted.

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