Popular recipes tagged "meta:loc=9"

Generate a set of random integers (Python)

2016-02-18T19:34:17-08:00

Python recipe 580613 by Lance Spence (numbers, random).

This is just a short and simple script that generates a set of random numbers. You enter how many random numbers you want and the program will generate them.

The num is multiplied by 10 in the upper limit within the for loop to give you larger generated integers. Adjust it as needed.

Detect what browser your website is being accessed from using php (PHP)

2013-06-19T20:09:55-07:00

PHP recipe 578571 by Captain DeadBones (browser, php, server).

This is a short hack on how to figure out what OS you site is being accessed from. This is useful if you want to redirect to different versions of your site through php.

Wrap any iterable context manager so it closes when consumed (Python)

2012-11-19T20:10:35-08:00

Python recipe 578342 by Andrew Barnert (contextmanager, context_manager, generator, iterable, iterator, with_statement).

There are a few types in Python—most notably, files—that are both iterators and context managers. For trivial cases, these features are easy to use together, but as soon as you need to use the iterator lazily or asynchronously, a with statement won't help. That's where this recipe comes in handy:

send_async(with_iter(open(path, 'r')))

This also allows you to "forward" closing for a wrapped iterator, so closing the outer iterator also closes the inner one:

sync_async(line.upper() for line in with_iter(open(path, 'r')))

Small random number generator (C)

2012-05-15T19:49:34-07:00

C recipe 578134 by Sachin Joglekar (generate, malloc, random, stdlib).

Generates random numbers in a given range using malloc function in stdlib.h. Based on the observation that the memory address allocated during malloc is usually 'random' (for humans). takes in two arguments- start of range, end of range.

Python Multidimensional List Searcher (Python)

2011-10-29T22:21:39-07:00

Python recipe 577929 by Alexander James Wallar (element, elements, find, finder, list, python, search).

This module/function lets you find a 2 dimensional list of indices for elements you are looking for in a super list. Example:

find([1,1,1,2,1,2,3,3],[1,2,3])

returns: [[0, 1, 2, 4], [3, 5], [6, 7]]

Remove UTF-8 Byte Order Mark (BOM) from text files (Bash)

2011-10-18T06:37:52-07:00

Bash recipe 577912 by Graham Poulter (text, unicode, utf8).

Shell script to removes UTF-8 Byte Order Mark (BOM) from text files, where present.

Python Easily Packetize / Slice / Chunk Text (Python)

2011-09-30T05:34:57-07:00

Python recipe 577885 by __nero (chunk, packetize, regex, split, udp).

I needed to chunk up some text to send over UDP and didn't want to have messy for loops with an if condition for size and then the little bit left over. All that struck me as very messy. I then thought of the re module and came up with a very simple solution to chunk up data.

Make a Class's Name Available in its Definition Body (Python)

2011-08-04T21:38:40-07:00

Python recipe 577813 by Eric Snow (classes).

Since a class object is created after the body is executed, it can't be available to the class body. Even the name is unavailable, at least by default. However, you can use the __prepare__() method in a metaclass to stick it in there. This recipe is a simple demonstration of how.

Pick random elements from a predefined list of choices (Python)

2011-06-14T17:46:41-07:00

Python recipe 577754 by Patrick Dobbs (choice, random, selection).

This (quick but strangely satisfying) recipe combines the use of random.choice with functools.partial from the standard library. It is a factory function returning random.choice pre-filled with its sequence of options.

Dictionary Who's Keys Act Like Attributes As Well (Python)

2011-05-26T20:15:16-07:00

Python recipe 577590 by Sunjay Varma (attribute, dict, keys).

Think of this as a JavaScript object. In JavaScript, the objects can be referenced by indexing (e.g. d[name]) or by directly using the dot (.) operator (e.g. d.name).

This is the same concept.

Note to Python 2.4 Users: You will need to change the "except KeyError as e:" line to "except KeyError, (e):".

Locate and import Python's standard regression tests (Python)

2010-09-17T11:31:31-07:00

Python recipe 577394 by Steven D'Aprano (import, path, regression, testing).

The Python standard library comes with an extensive set of regression tests. I had need to import and run some of these tests from my own code, but the test directory is not in Python's path. This simple helper function solves the problem.

Show all url patterns in django (Python)

2010-03-26T20:04:08-07:00

Python recipe 576974 by Michael Grünewald (django, urls). Revision 5.

This small script shows a simple formatted tree of all defined django url patterns.

string multi-partitioning (Python)

2010-03-26T20:03:59-07:00

Python recipe 577017 by Michael Grünewald (partition, string). Revision 6.

Works like the partition method of strings in Python2.5+, but has support for more than one delimiter.

Better description by Gabriel Genellina:

Split the string at separator boundaries. The separators are searched from left to right, in the same order specified, and one after another. Unlike partition, all of them must be present (else ValueError is raised). Only one split per separator occurrence is done. Returns a list containing one more element than separators were given: first, text from beginning of the string up to (but not including) the first separator; the first separator itself; text between the first separator and the second one; the second separator; and so on. The last element contains all text following the last separator.

Create SHA Hashes of a Directory (Python)

2009-04-14T08:10:26-07:00

Python recipe 576716 by andrew.canit (encryption, hash, security, sha). Revision 2.

Walk through a Directory creating SHA Hashes of each file path

text-to-html (Python)

2009-03-05T23:10:50-08:00

Python recipe 576682 by nillgump nillgump (html).

将文本排版转化为html中相同的排版。为google blog服务

PyTube (Python)

2008-12-07T01:19:17-08:00

Python recipe 576524 by Jonny Reeves (internet, script, search, youtube). Revision 3.

Based off PyGoogle, this script searches Youtube.

Date & time RFC822 formatted for RSS2, etc (straw man) (Python)

2008-05-07T17:33:26-07:00

Python recipe 572190 by Bill Bell (algorithms).

I live in a geographical area whose daylight savings time provisions seem to fool software. I would therefore like to avoid mentioning time zone when I create a timestamp in RFC822 format. I have looked for but could not find an elegant way of expressing what I want. In hopes that someone will see this and be aghast at my ignorance, then provide something nice, I humbly offer the following.

It takes a datetime and gives back an RFC822 timestamp (I think).

autovivication dictonaries (Python)

2007-12-19T05:23:08-08:00

Python recipe 537637 by Mirko Dziadzka .

A nested dictionary which creates subnotes on the fly.

Very Simple Delimiter Separated Values File Reader Generator (Python)

2007-12-17T20:59:24-08:00

Python recipe 535172 by N N (files).

This is a bare-bones reader generator for file processing of typical Unix style configuration and data files.

autovivication dictonaries (Python)

2007-12-19T05:23:05-08:00

Python recipe 537636 by Mirko Dziadzka .

A nested dictionary which creates subnotes on the fly.