Get the path of the currently executing python script using import. (Python)

2006-02-24T05:23:36-08:00

Python recipe 474083 by Jitender Cheema (sysadmin).

1. sys.arg has the script name

2. Although there can be many ways, e.g. os.cwd() but, there is another

trick to

obtain the Complete URI or Location of the current script.

You can argue, os.getcwd()

import can give you working directory of the current script

Third party Java code calling your script.... ;)

Looping through multiple lists (Python)

2001-06-29T16:53:42-07:00

Python recipe 65285 by andy mckay (shortcuts). Revision 2.

Often you need to loop through every item of multiple lists and compare them. This can be done without a using a counter.

Frame with border color for Tkinter (Python)

2017-04-17T11:25:02-07:00

Python recipe 580735 by Miguel Martínez López (border, color, frame, tkinter).

This trick show how to add a border color to frame. These are the important configurations:

 highlightbackground="your border color here"
 highlightcolor="your border color here"
 highlightthickness="the border width"
 bd= 0

Diff Two Dictionaries (Python)

2009-02-05T08:35:07-08:00

Python recipe 576644 by Michael Shepanski (dictionary, diff, difference).

Diff two dictionaries returning just the differences. If an item is not found, it is represented by the string "<KEYNOTFOUND>". If there is a better way, please share. :)

Check that a string represents an integer number (Python)

2004-09-05T06:50:04-07:00

Python recipe 303495 by Francesco Ricciardi (text).

Many times I needed to check if a string represented a number or not. This is a very short recipe that uses Python int() function to do the check, instead of looping on the single characters.

Storing binary data in SQLite (Python)

2003-12-13T20:37:16-08:00

Python recipe 252531 by John Barham (database).

This script demonstrates how to store binary data (aka BLOB or BINARY fields) in SQLite using the PySQLite extension.

Generate SQL for insertation into table from dictionary object (Python)

2005-11-26T18:28:53-08:00

Python recipe 457661 by Carson Reynolds (database). Revision 2.

This recipe shows you how you might generate SQL code to insert the key-value pairs in a dictionary. The parameter table corresponds to an existing SQL table and dictionary keys correspond to the table's SQL column names. The SQL generated can then be inserted into a database (in this case MySQL) in the manner shown in exampleOfUse().

Generate a salt (PHP)

2012-07-10T19:52:17-07:00

PHP recipe 576894 by Xavier L. (crypt, generation, generator, hash, pass, password, salt, secure, security, string). Revision 6.

This function will generate a salt for use with passwords ranging using characters in range a to z, A to Z, 0 to 9 and !@#$%&?. The characters are sorted in a random value and can appear more than one time in the string. This way, this function is more powerful than the *shuffle() function. This means that the salt could also be longer than the character list.

Just For Fun: Quicksort in 3 Lines (Python)

2001-08-07T20:58:18-07:00

Python recipe 66473 by Nathan Gray (search). Revision 4.

OK, 4 lines if you count wrapped lines. :^) This is a rather naive implementation of quicksort that illustrates the expressive power of list comprehensions. DO NOT USE THIS IN REAL CODE!

NOTE: Due to an annoyance in the ASPN submission filters you must manually remove the space after the '\' character in the third line if you intend to use the code. Otherwise you will get a syntax error.

Function Timeout (Python)

2007-10-19T22:33:18-07:00

Python recipe 534115 by Symon Polley (algorithms). Revision 2.

a simple and useful script that uses signal to time out any function.

EDIT: use Jim Carrolls solution below

min/max "peaks" with Numeric (Python)

2006-03-27T02:12:32-08:00

Python recipe 475188 by Maxim Krikun (algorithms).

Given a large one-dimensional array, break it into blocks of contstant length and compute min and max for each block, the so-called "peaks data".

Bifurcation diagram of logistic map (Python)

2010-07-24T02:40:54-07:00

Python recipe 577332 by FB36 (fractal, graphics, image, math). Revision 2.

Bifurcation diagram of the logistic map.

various Windows Script Host (WSH) examples converted to Python (Python)

2001-06-08T10:49:34-07:00

Python recipe 65108 by Kevin Altis .

various Windows Script Host (WSH) examples converted to Python. The originals are at: http://msdn.microsoft.com/scripting/default.htm?/scripting/windowshost/doc/wsMthRun.htm http://msdn.microsoft.com/scripting/windowshost/doc/wsproenvironment.htm http://msdn.microsoft.com/scripting/default.htm?/scripting/windowshost/doc/wsMthSendKeys.htm

Note that this script is a Python program that utilizes WSH, so use a .py extension rather than .pys.

Creating array into batch (Batch)

2012-11-01T18:35:05-07:00

Batch recipe 578314 by greg zakharov (array). Revision 2.

Command language supports creation array. For example:

Prime Number Generator (Python)

2009-02-03T15:47:06-08:00

Python recipe 576640 by dth (eratosthene, generator, number, of, prime, sieve). Revision 7.

Generate all prime numbers up to n.

Farey Sequence (Python)

2006-06-24T12:38:55-07:00

Python recipe 496821 by James Kassemi (algorithms).

Function provides farey sequence, F(n), for any integer n.

Android Gmail: export messages from SQLite database blobs (Python)

2013-03-22T11:45:11-07:00

Python recipe 578106 by ccpizza (android, sqlite). Revision 5.

This script will extract email message bodies from the SQLite database stored in an android phone.

The gmail database is typically located on your phone under the following location:

`\data\data\com.google.android.gm\databases\mailstore.YOURUSERNAME@gmail.com.db`

To use the script, copy the file above from your phone to your machine and rename it to gmail.db.

NOTE: You need a rooted phone in order to get access to the folder above.

XML Directory Tree (Python)

2004-09-28T19:12:23-07:00

Python recipe 305313 by Raymond Hettinger (programs). Revision 4.

Builds a directory tree in XML format. Demonstrates how to use xml.dom.minidom to rapidly construct nested XML with multiple element types and attributes. Serves as a model for building model complex documents.

getShortPathName (Python)

2004-06-30T14:11:00-07:00

Python recipe 286179 by Ruben Marquez .

In Windows it is often useful to get the "Short Name" version (8.3) of a file or directory path. The Windows api does not provide a function that one can call for this.

Wrap a string in a file-like object that calls a user callback whenever read() is called on the stream (Python)

2013-09-22T21:48:03-07:00

Python recipe 578669 by Ben Hoyt (callback, file, progress, upload).

Wraps a string in a read-only file-like object, but also calls a user callback with the number of bytes read whenever read() is called on the stream. Used for tracking upload progress, for example for a progress bar in a UI application.

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