dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

micahwalter

def shannon_entropy(img):

	# calculate the shannon entropy for an image

	histogram = img.histogram()
	histogram_length = sum(histogram)

	samples_probability = [float(h) / histogram_length for h in histogram]

	return -sum([p * math.log(p, 2) for p in samples_probability if p != 0])

bsweger

Useful Pandas Snippets

A personal diary of DataFrame munging over the years.

Data Types and Conversion

Convert Series datatype to numeric (will error if column has non-numeric values)
(h/t @makmanalp)

tr00st

#!/bin/bash
#
# Copyright 2015 James Cheese
# You may do anything with this work that copyright law would normally
# restrict, so long as you retain the above notice(s) and this license
# in all redistributed copies and derived works.  There is no warranty.
#
# Python 3 Upgrade for Django Droplet
# Will update the "Django on 14.04" Digital Ocean image.
# Run as root.