stevedoyle’s gists

stevedoyle / virtualenv.txt

Created December 23, 2016 13:26

	# virtualenv setup
	cd proj_folder
	virtualenv venv

	# or with a particular version of python
	virtualenv -p /usr/bin/python2.7 venv

	# Activate it
	source venv/bin/activate

stevedoyle / tcxsplit.py

Created January 29, 2015 11:25

Split TCX file with laps into multiple files, with 1 lap per file

	import copy
	import os
	from lxml import objectify

	namespace = 'http://www.garmin.com/xmlschemas/TrainingCenterDatabase/v2'

	def remove_laps():
	pass

	def count_laps(tree_root):

stevedoyle / lxml_xpath_remove.py

Created January 28, 2015 15:47

Remove a node from an XML tree using lxml objectify and xpath

	from StringIO import StringIO
	from lxml import objectify

	class SampleParser:

	def __init__(self, xml_data):
	tree = objectify.parse(xml_data)
	self.root = tree.getroot()

	def student_names(self):

stevedoyle / xpath_find_text

Last active August 29, 2015 14:14

XPath for finding elements with a given text value

	Find students whose name is Bob:
	//Student/name[text()="Bob"]

stevedoyle / NSFetchedResultsController_Example.swift

Created January 23, 2015 11:04

NSFetchedResultsController Usage Pattern

	class GoalsViewController: UITableViewController, NSFetchedResultsControllerDelegate {
	...
	let managedContext = (UIApplication.sharedApplication().delegate as AppDelegate).managedObjectContext
	var fetchedResultsController: NSFetchedResultsController = NSFetchedResultsController()
	...
	func getFetchedResultsController() -> NSFetchedResultsController {
	fetchedResultsController = NSFetchedResultsController(fetchRequest: goalFetchRequest(), managedObjectContext: managedContext!, sectionNameKeyPath: nil, cacheName: nil)
	return fetchedResultsController
	}

stevedoyle / nsnumber_arithmetic.swift

Created January 22, 2015 09:53

Working with NSNumber in Swift

	var targetDistance: NSNumber = 4000
	var completedDistance: NSNumber = 121.7
	var percentComplete: Float

	// NSNumber can contain different types, so need to be explicit about the type of its value
	// when using it in arithmetic
	percentComplete = (completedDistance.floatValue / targetDistance.floatValue) * 100
	println(percentComplete)

stevedoyle / argparse.py

Last active December 23, 2016 13:00

Using argparse for command line argument parsing in python

	import argparse
	import logging

	def main():
	parser = argparse.ArgumentParser(description="Example")

	parser.add_argument('-v', '--verbose', action='store_true', help="Verbose output")

	parser.add_argument('--size', nargs='*', default=[256], type=int, choices=[256,512,768,1024], help="Data sizes (default = 256)")

stevedoyle / aes_cbc_iv_example.py

Created November 19, 2014 11:18

Demonstrate pseudo-random IV generation for AES-CBC using a counter as IV input

	#!/usr/bin/env python

	from Crypto.Cipher import AES
	from Crypto.Cipher import DES3

	def add_padding(message):
	pad_len = 16 - (len(message) % 16)
	message += (' ' * pad_len)
	return message

stevedoyle / xpath

Created November 18, 2014 20:35

Use xpath to find all nodes of a given name

	from lxml import objectify
	tree = objectify.parse(tcx_file')
	root = tree.getroot()
	root.xpath('//ns:HeartRateBpm', namespaces={'ns': 'http://www.garmin.com/xmlschemas/TrainingCenterDatabase/v2'}

stevedoyle / compress_files.py

Created April 17, 2014 10:25

Compress individual files with gzip

	#!/usr/bin/env python

	import argparse
	import subprocess
	import shlex
	import sys

	def compress_file(filename, level):
	try:
	cmd = shlex.split("gzip %s -c %s" % (level, filename))

Stephen Doyle stevedoyle