Popular recipes tagged "meta:loc=72"

bind all tkinter "bug" (Python)

2017-05-05T20:33:31-07:00

Python recipe 580795 by Miguel Martínez López (all, bind, binding, tkinter). Revision 3.

This recipes tries to solve the problem of bind_all and unbind_all for tkinter.

When a callback is registered using bind_all method and later it's unregistered using unbind_all, all the callbacks are deleted for the "all" tag event. This makes difficult to register and unregister only one callback at a time. This recipes tries to solve this problem.

Observe the difference between the code below and the recipe. With the code below, when the user clicks nothing happens. But with my recipe it's possible to bind and unbind specific callbacks.

try:
    from Tkinter import Tk, Frame
except ImportError:
    from tkinter import Tk, Frame

root = Tk()
f = Frame(root, width= 300, height=300)
f.pack()

def callback1(event):
    print("callback1")

def callback2(event):
    print("callback2")

def callback3(event):
    print("callback3")

root.bind_all("<1>", callback1, add="+")
f.bind_all("<1>", callback2, add="+")
f.bind_all("<1>", callback3, add="+")

f.unbind_all("<1>")

root.mainloop()

A command-line musical alarm clock (Python)

2016-12-30T19:06:32-08:00

Python recipe 580739 by Vasudev Ram (alarm, audio, clock, multimedia, music, playsound, python, time, utilities, utility).

This is a simple musical alarm clock in Python. You pass a command-line argument specifying the time in minutes after which the alarm should go off. When that time arrives, it plays a musical sound.

Analog clock (Python)

2013-10-11T05:25:34-07:00

Python recipe 578683 by greg zakharov (analog, clock).

Analog clock with Qt4

Youtube Playlist Parser/Extractor (Python)

2014-07-30T07:23:36-07:00

Python recipe 578284 by p@ntut$ (extractor, playlist, youtube). Revision 18.

Parse/extract URLs from playlist in youtube (User's videos not favorites) Link: http://pantuts.com/2013/02/16/youparse-extract-urls-from-youtube/

Immutable Type Hierarchies (Python)

2010-10-11T23:32:31-07:00

Python recipe 577424 by Aaron Sterling (abc, hierarchy, immutable). Revision 4.

Allows for type hierarchies of immutable types by faking inheritance using dict updates and abc's.

Snowflake Fractal Applet using Cellular Automaton (Java)

2010-07-17T00:42:13-07:00

Java recipe 577311 by FB36 (applet, fractal, graphics, math).

Snowflake fractal applet using Cellular Automaton (2d CA).

Path entire split & commonprefix (Python)

2011-04-06T20:29:46-07:00

Python recipe 577016 by Maxime Fontenier (commonprefix, path, split). Revision 5.

This recipe is a kind of extension to os.path It offers an entire split function and a true commonprefix for paths.

Low level inotify wrapper (Python)

2013-08-12T14:39:57-07:00

Python recipe 576375 by Louis RIVIERE (ctypes, inotify, linux, system). Revision 10.

This module is meant to be as simple and straightforward as it gets.

Indirect insertion of value to a list (Python)

2008-03-29T21:20:52-07:00

Python recipe 552742 by Ernesto Adorio (algorithms).

The code to insert a value to a list indirectly ordered by an extra index list is useful by itself.

Simple file ziping utility (Python)

2007-11-06T04:45:50-08:00

Python recipe 534157 by trevellyon newell (files).

After searching the web, ASPN and not finding a simple example of using gzip to zip a file. I created this little gem. it is a little rough at the edges, ie it does not check to see if the file it is zipping to is there (it will over write it, you have been warned).

Walker encapsulates os.walk for easy reuse (Python)

2007-08-29T15:07:29-07:00

Python recipe 528904 by Jack Trainor (files). Revision 2.

Walker encapsulates os.walk's directory traversal as an object with the added features of excluded directories and a hook for calling an outside function to act on each file.

Walker can easily be subclassed for more functionality, as with ReWalker which filters filenames in traversal by a regular expression.

Ordered Dictionary that works (Python)

2007-06-07T03:43:09-07:00

Python recipe 521893 by Anand Chitipothu .

A dictionary in which the insertion order of items is preserved.

Based on Doug Winter's recipe http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/438823

recursively update a dictionary without hitting "Python recursion limit" (Python)

2006-12-21T10:28:56-08:00

Python recipe 499335 by Robin Bryce . Revision 3.

This function recursively walks the items and values of two dict like objects. At each level when a key exists in both, and each value is a dict, then the destination dict is updated from the source dict usiing the builtin dict.update method. After the operation all keys and values from the source, at any level, will be referenced in the destination.

Rich iterator wrapper (Python)

2006-11-19T00:03:21-08:00

Python recipe 498272 by George Sakkis (oop).

This recipe may be of interest to those who make heavy use of the itertools module. It provides a wrapper class that exposes most itertools functions as methods, plus a few more. Moreover, two frequently used itertools functions, chain and islice, are conveniently exposed as addition and slicing operators, respectively.

Sudoku Solver (Python)

2006-03-14T07:52:29-08:00

Python recipe 473893 by Raymond Hettinger (algorithms). Revision 5.

Yet another solver. Uses knowns to eliminate possibilities, then tries assumptions from remaining possibilities (depth-first search with heuristic to first explore cells with the fewest unknowns).

fancy rich comparisons and MAXIMUM ANY and MINIMUM objects... (Python)

2004-10-28T00:37:49-07:00

Python recipe 325394 by Alex Naanou (algorithms). Revision 3.

here we will see an example of template comparisons based on a logical ANY object. also this recipe provides alternative implementations of the absolute maximum and minimum objects (for more details on them see PEP326 http://www.python.org/peps/pep-0326.html).

bubblebabble (Python)

2004-08-10T16:34:30-07:00

Python recipe 299133 by Ralf Schmitt .

This module provides a bubblebabble function, which computes a (somewhat more) human readable format for message digests.

Caching and aliasing with descriptors (Python)

2004-04-05T03:59:01-07:00

Python recipe 276643 by Denis Otkidach (oop).

A few simple discriptor classes to compute and cache attribute value on demand and to define attribute as alias to other.

Install bound methods in an instance (Python)

2003-09-19T02:05:17-07:00

Python recipe 223613 by john mclaughlin .

Python has an extremely flexible object model that allows for assignment of arbitrary objects to arbitrary attributes of instances. I would like to do something like this: def button( self ): print "Pressed!" and then assign it to an instance: mywidget.bigred = button and call it: mywidget.bigred()

However this doesn't work because the attribute needs to be a bound method, not a function. Also, the name of the installed function remains button (eg. in stack traces), when we would like it to be bigred.

This recipe provides the installmethod() and renamefunction() functions to solve this problem.

Making Date Input more interactive Variables for MySQL (PHP)

2003-06-30T14:04:56-07:00

PHP recipe 208104 by imam ferianto .

If we want to store date_column in MySQL we must using format 'YYYY-MM-DD' but we can build input form for this tipe. Currenly I making this in Indonesian date but you can modify your self.