davidwtbuxton’s gists

davidwtbuxton / views.py

Created March 31, 2016 06:47

Serving Google Cloud Storage files from App Engine without having to read them

	import mimetypes

	from django.http import HttpResponse
	from google.appengine.api import app_identity
	from google.appengine.ext import blobstore


	def serve_cloud_storage_file(request, object_name):
	"""Serve a file from cloud storage by setting a header on the response.
	The blobstore will serve it for you.

davidwtbuxton / angular.md

Created July 12, 2016 15:23

For future reference

If you want to make us angry you can do

<ng-class="{'ng-hidden': condition}">

instead of ng-hidden="condition"

or even better

davidwtbuxton / gist:ca843407f025e1b5b4585aa415885321

Last active October 12, 2016 18:22

Benchmarks for bencodepy.encode and buxtor.bencode.

	# Speed comparison of bencodepy and buxtor.bencode
	# bencodepy is consistently 0.3 - 0.5 seconds faster. Why?

	# bencodepy: https://github.com/eweast/BencodePy/blob/master/bencodepy/encode.py
	# 4914005 function calls (3618005 primitive calls) in 2.830 seconds
	#
	#
	# buxtor.bencode: https://github.com/davidwtbuxton/buxtor/blob/master/buxtor/bencode.py
	# 5592005 function calls (4548005 primitive calls) in 3.183 seconds

davidwtbuxton / digests.py

Created May 15, 2017 20:24

	#!/usr/bin/env python2
	import csv
	import hashlib
	import sys


	# Calculate an MD5 checksum for every row in the first column of a CSV.
	# Example:
	# $ python digests.py < src.csv > dest.csv

davidwtbuxton / grouper.py

Last active August 10, 2017 23:27

Like itertools.grouper but the last group doesn't have padding

	import itertools


	def grouper(iterable, n):
	"""Collect data into chunks.

	This is different to the grouper recipe in itertools in that the final
	chunk may be shorter.

	>>> grouper('ABCDEF', 3)

davidwtbuxton / gist:d27c6d8f58e400ddac5e81974c39b0b5

Created November 9, 2017 16:46

Test output for djangae branch 958-computed-field-pagination

	(djangae) $ git show
	commit 0523c70eba0f7bc7b36933fbbf002e4611086720 (HEAD -> 958-computed-field-pagination, upstream/958-computed-field-pagination)
	Merge: 010a6cd1 b96d2284
	Author: Phil Tysoe <[email protected]>
	Date: Thu Nov 9 16:05:51 2017 +0000

	Merge branch 'master' into 958-computed-field-pagination

	diff --cc CHANGELOG.md
	index 4d961159,cb652b0c..0d7ae63e

davidwtbuxton / gist:5eb20ae04c33012b2452b4d225952888

Created November 9, 2017 17:33

More test output for 958-computed-field-pagination

	(djangae) $ git log HEAD~1..
	commit 74bee22fc276276af6dc82db9dc6b933a0d2e6b0 (HEAD -> 958-computed-field-pagination, upstream/958-computed-field-pagination)
	Author: Phil Tysoe
	Date: Thu Nov 9 17:11:29 2017 +0000

	Fix 16 bit max signed int value

	(djangae) $ ./runtests.sh
	Not running install_deps. Pass --install_deps if you want to install dependencies.
	Creating test database for alias 'default'...

davidwtbuxton / example.py

Created December 5, 2017 19:48

python 2 string formatting fun

	$ python2.7
	Python 2.7.14 (default, Sep 22 2017, 00:06:07)
	[GCC 4.2.1 Compatible Apple LLVM 8.1.0 (clang-802.0.42)] on darwin
	Type "help", "copyright", "credits" or "license" for more information.
	>>> value = u'\u0141uk\u0105\u015b\u017a'
	>>> '%s' % value
	u'\u0141uk\u0105\u015b\u017a'
	>>> '{}'.format(value)
	Traceback (most recent call last):
	File "<stdin>", line 1, in <module>

davidwtbuxton / memory_vs_disk.py

Last active December 7, 2017 19:50

Seeing how reading an image file from disk compares to constructing it in memory

	import io
	import os
	import tempfile
	import timeit


	# A valid PNG file.
	png_bytes = (
	'\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\x01\x00\x00\x00\x01\x08'
	'\x06\x00\x00\x00\x1f\x15\xc4\x89\x00\x00\x00\nIDATx\x9cc\x00\x01\x00\x00'

davidwtbuxton / gist:9af0250ce66ccb64eee4214ab4ab070e

Last active December 14, 2017 18:50

Profiling different ways for testing if there's an empty string value

	$ python -m timeit -s "a, b, c, d, e, f = 'abcdef'" "any(v for v in (a, b, c, d, e, f) if v == '')"
	1000000 loops, best of 3: 1.51 usec per loop
	$ python -m timeit -s "a, b, c, d, e, f = 'abcdef'" "'' in (a, b, c, d, e, f)"
	1000000 loops, best of 3: 0.36 usec per loop
	$ python -m timeit -s "a, b, c, d, e, f = ' bcdef'" "any(v for v in (a, b, c, d, e, f) if v == '')"
	1000000 loops, best of 3: 1.52 usec per loop
	$ python -m timeit -s "a, b, c, d, e, f = ' bcdef'" "'' in (a, b, c, d, e, f)"
	1000000 loops, best of 3: 0.354 usec per loop
	$ python -m timeit -s "a, b, c, d, e, f = 'abcde '" "any(v for v in (a, b, c, d, e, f) if v == '')"
	1000000 loops, best of 3: 1.49 usec per loop

David Buxton davidwtbuxton