Popular recipes tagged "meta:score=5"

Fast min/max function (Python)

2011-10-22T18:40:32-07:00

Python recipe 577916 by Raymond Hettinger (minmax, sorting).

Minimizes the number of comparisons to compute the minimum and maximum of a dataset. Uses 1.5 compares for every element, improving on the more obvious solution that does 2 comparisons per element.

Convert CSV to XML (Python)

2010-10-11T06:20:19-07:00

Python recipe 577423 by FB36 (csv, xml).

Convert CSV to XML.

wrist friendly dictionary (Python)

2013-08-18T22:54:26-07:00

Python recipe 578644 by Ariel Keselman (dictionary, interface, nested).

this dictionary allows easy manual creation of nested hierarchies, like so:

window.style.width=5

or...

window['background-color'].rgb= 255,255,255

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')))

download the Activestate cook book recipe (Python)

2013-01-29T16:24:22-08:00

Python recipe 578439 by lwz7512 .

Small effort to store the python recipes to our local

similar effort by other people: 543267-i-will-download-all-of-the-recipes-from-the-python 535162-i-download-all-the-python-cookbook-recipes

One-liner to show the caller of the current function. (Python)

2013-02-12T13:13:16-08:00

Python recipe 578422 by Oren Tirosh (_getframe).

This is a quick one-liner to produce the filename and line number of the caller of the current function.

Python code clone detector (Don't Repeat Yourself) (Python)

2012-07-12T14:59:11-07:00

Python recipe 578206 by fra (analysis, clone, code, dry, duplication, parse, similarity, static, syntax). Revision 2.

Find duplicate code in Python 2/3 source files. Write a nice report about it.

Works at the Abstract Syntax Tree level, which is a robust way to detect clones. See this code duplicated in the Python 3.2 standard library.

Update: I cleaned the code a little bit, made it Python 2.7 compatible and faster.

Recursively walk Python objects (Python)

2011-12-23T22:10:38-08:00

Python recipe 577982 by Yaniv Aknin (container, recursive, recursive_iterator, walk). Revision 2.

A small function that walks over pretty much any Python object and yields the objects contained within (if any) along with the path to reach them. I wrote it and am using it to validate a deserialized data-structure, but you can probably use it for many things.

Dropbox file uploader via web interface using Python with urllib2 and mechanize (Python)

2016-04-28T13:21:43-07:00

Python recipe 578030 by ccpizza (dropbox, mechanize). Revision 7.

UPDATE: This is script is not maintained and does not anymore with the current version of Dropbox. For a proper command line interface to dropbox I recommend dropbox_uploader: https://github.com/andreafabrizi/Dropbox-Uploader

Originally inspired by the example at http://joncraton.org/blog/62/uploading-dropbox-python.

The script uses mechanize to logon to the web page and upload the file(s) to the Dropbox root folder or to the folder supplied on the command line as dir:/my_dropbox_path (if present, this must be the first parameter).

Multiple files and/or glob patterns names are accepted as script arguments.

Example usage

dropbox.py file1.txt                       # upload to root folder
dropbox.py dir:/Backups/2012 file1.txt     # upload to custom folder
dropbox.py dir:/Backups/2012 *.txt         # upload by file mask
dropbox.py dir:/Backups/2020 *             # upload all files in current dir

Limitations: only files in current folder are processed, subfolders are ignored.

NOTE

The script requires the mechanize module - use pip install mechanize or easy_install mechanize to add it to your site-packages.

NOTE2

I have found a cleaner way to manage dropbox files from the console - see the dropbox-uploader script at https://github.com/andreafabrizi/Dropbox-Uploader - it is a Bash script that works using the official Dropbox API rather than emulating a web browser.

ActiveState recipe importer (Python)

2011-11-23T02:27:51-08:00

Python recipe 577958 by nosklo (activestate, code, import, library).

Finally! This code allows you to import any activestate recipe right into your code!

Example:

>>> from activestate.recipe194373 import mreplace
>>> print mreplace('ectave steta racipas rock!', ('a', 'e'), ('e', 'a'))
active state recipes rock!

Save this as activestate.py

Left-handed password generator (Python)

2011-10-31T12:51:14-07:00

Python recipe 577930 by Alex (generator, lefthand, lefthanded, password, passwords). Revision 2.

Generate passwords that can easily be typed with only the left hand, very simple script

Discrete PID Controller (Python)

2015-12-18T20:59:43-08:00

Python recipe 577231 by Caner (controller, derivative, discrete, integral, pid, proportional, python).

The recipe gives simple implementation of a Discrete Proportional-Integral-Derivative (PID) controller. PID controller gives output value for error between desired reference input and measurement feedback to minimize error value. More information: http://en.wikipedia.org/wiki/PID_controller

For new version please check: https://github.com/ivmech/ivPID

Sleepsort (Python)

2011-06-17T05:17:22-07:00

Python recipe 577756 by Raymond Hettinger (sorting, threads). Revision 2.

Funky sort routine to demonstrate Python's threading basics.

Efficient Running Median using an Indexable Skiplist (Python)

2010-02-07T14:40:03-08:00

Python recipe 576930 by Raymond Hettinger (advanced_data_structure, container, median, new_algorithm, skiplist, sliding_window). Revision 10.

Maintains sorted data as new elements are added and old one removed as a sliding window advances over a stream of data. Also gives fast indexed access to value. Running time per median update is proportional to the log of the window size.

Check for package updates on PyPI (works best in pip+virtualenv) (Python)

2011-05-19T17:54:43-07:00

Python recipe 577708 by Artur Siekielski (pip, pypi, virtualenv).

Pip has an option to upgrade a package (_pip install -U_), however it always downloads sources even if there is already a newest version installed. If you want to check updates for all installed packages then some scripting is required.

This script checks if there is a newer version on PyPI for every installed package. It only prints information about available version and doesn't do any updates. Example output:

distribute 0.6.15                        0.6.16 available
Baker 1.1                                up to date
Django 1.3                               up to date
ipython 0.10.2                           up to date
gunicorn 0.12.1                          0.12.2 available
pyprof2calltree 1.1.0                    up to date
profilestats 1.0.2                       up to date
mercurial 1.8.3                          up to date

Python Thread Pool (Python)

2010-04-12T22:27:32-07:00

Python recipe 577187 by Emilio Monti (pool, thread). Revision 9.

A simple Python ThreadPool based on the standard library's Queue object.

transform command line arguments to args and kwargs for a method call (Python)

2010-03-21T22:41:42-07:00

Python recipe 577122 by Trent Mick (argv, cli, json). Revision 2.

For many of my Python modules I find it convenient to provide a small if __name__ == "__main__": ... block to be able to call individual methods from the command line. This requires some kind of translation of command-line string arguments to args and kwargs for the method call. This recipe uses a few conventions to do that:

the first argument is the method name
positional args are positional (duh)
"key=value" is a keyword argument
an attempt is made to interpret arguments as JSON to allow specifying types other than string

sending gmail though python code (Python)

2013-03-23T10:01:02-07:00

Python recipe 577371 by Raghuram (python_scripts). Revision 2.

sending gmail though your python code

Improved ReportLab recipe for "page x of y" (Python)

2009-07-06T10:03:28-07:00

Python recipe 576832 by Vinay Sajip (pdf, reportlab). Revision 2.

This recipe is based on Recipe 546511 which does not work reliably if there are images in the content.

Counter class (Python)

2009-06-29T12:24:14-07:00

Python recipe 576611 by Raymond Hettinger . Revision 11.

Bag/multiset class for convenient tallying of hashable objects.