dmwyatt’s gists

dmwyatt / temp_backup.py

Last active October 25, 2023 22:09

[temporarily replace file] Sometimes when testing I want to replace a file with a test file. This context manager does that. #testing

	import contextlib
	import shutil
	from pathlib import Path


	@contextlib.contextmanager
	def replace_file(orig, replace_with):
	if not replace_with.is_file():
	raise ValueError("{} does not exist.".format(replace_with))
	if orig.is_file():

dmwyatt / check_if_executable.py

Last active October 25, 2023 22:09

[Check if file is executable.]

	def is_exe(filepath):
	return os.path.isfile(filepath) and os.access(filepath, os.X_OK)

dmwyatt / hash_dir.py

Last active October 25, 2023 22:09

[hash directory and capture filename data]

	import os
	import hashlib


	def hash_dir(path):
	"""
	Create a hash out of a directory that handles renamed files.

	A hash of the contents of a file will not capture a hash of the filename.
	This function will add filenames to the hash so that we can know if a

dmwyatt / recursive_glob.py

Last active December 6, 2019 18:39

[Recursive glob.] Demo of `fnmatch`. Matches filenames, recursively. From http://stackoverflow.com/questions/2186525/use-a-glob-to-find-files-recursively-in-python

	import fnmatch
	import os

	matches = []
	for root, dirnames, filenames in os.walk("src"):
	for filename in fnmatch.filter(filenames, "*.c"):
	matches.append(os.path.join(root, filename))

dmwyatt / string_format.js

Last active November 26, 2019 01:49

[String.format for javascript]

	// From http://stackoverflow.com/questions/1038746/equivalent-of-string-format-in-jquery

	String.prototype.format = String.prototype.f = function() {
	var s = this,
	i = arguments.length;

	while (i--) {
	s = s.replace(new RegExp('\\{' + i + '\\}', 'gm'), arguments[i]);
	}
	return s;

dmwyatt / test_cbv.py

Last active December 6, 2019 18:41

[Class based views (CBV) unit testing] #django

	# From http://tech.novapost.fr/django-unit-test-your-views-en.html
	# or https://tech.people-doc.com/django-unit-test-your-views.html
	#
	# django test client is an integration test, not a unit test so we
	# need a way to test views.
	import unittest
	from django.test import RequestFactory


	def setup_view(view, request, args, *kwargs):

dmwyatt / model_diff_mixin.py

Last active October 25, 2023 22:08

[ModelDiffMixin: compare previous values to new values] lets you compare previous values to new values when saving Django model #django

	from django.forms.models import model_to_dict


	class ModelDiffMixin(object):
	"""
	A model mixin[1] that tracks model fields' values and provide some useful api
	to know what fields have been changed.

	[1] http://stackoverflow.com/questions/1355150/django-when-saving-how-can-you-check-if-a-field-has-changed
	"""

dmwyatt / register_app_routes.py

Last active October 25, 2023 22:08

[auto drf url registration] Using Django Rest Framework's DefaultRouter to build an API Root for urls.py files located in individual apps. #django #drf

	# urls.py
	def register_routes(router, apps):
	"""
	Register DRF router routes from urls.py in the provided apps.

	>>> router = routers.DefaultRouter()
	>>> register_routes(router, ['app1', 'app2', 'app3])
	"""
	for app in apps:
	urls = importlib.import_module(app+".urls")

dmwyatt / dict_differ.py

Last active October 25, 2023 22:07

[dict diff]

	class DictDiffer(object):
	"""
	Calculate the difference between two dictionaries as:
	(1) items added
	(2) items removed
	(3) keys same in both but changed values
	(4) keys same in both and unchanged values

	http://stackoverflow.com/questions/1165352/fast-comparison-between-two-python-dictionary/1165552#1165552
	"""

dmwyatt / show_urls.py

Last active October 25, 2023 22:07

[Pretty print urls] Print indented list of urls configured in a django project #django

	def show_urls(urllist: list, indent_depth: int = 0, indent_char: str = " "):
	"""
	Prints a list of urls for this project.

	:param urllist: A list of url patterns. Typically `urlpatterns` imported from `urls.py`
	:param indent_depth: How far to indent for each sub-level of urls
	:param indent_char: The charcter to use to indent.
	"""
	for entry in urllist:
	print(indent_char * indent_depth, entry.regex.pattern, end="")

Dustin Wyatt dmwyatt