Lasha Gogua Lh4cKg

Comprehensions in Python the Jedi way

Beautiful is better than ugly. Explicit is better than implicit.

I frequently deal with collections of things in the programs I write. Collections of droids, jedis, planets, lightsabers, starfighters, etc. When programming in Python, these collections of things are usually represented as lists, sets and dictionaries. Oftentimes, what I want to do with collections is to transform them in various ways. Comprehensions is a powerful syntax for doing just that. I use them extensively, and it's one of the things that keep me coming back to Python. Let me show you a few examples of the incredible usefulness of comprehensions.

	#!/usr/bin/env python

	from type_checked_entities import entity_factory

	Giraffe = entity_factory( # let's define what is a giraffe!
	"giraffe",
	name=str, # my name is a string
	age=float, # my age is an int
	eats=object, # I eat pretty much everything.
	)

	I use the first


	—– BEGIN LICENSE —–
	Michael Barnes
	Single User License
	EA7E-821385
	8A353C41 872A0D5C DF9B2950 AFF6F667
	C458EA6D 8EA3C286 98D1D650 131A97AB
	AA919AEC EF20E143 B361B1E7 4C8B7F04

	from django.db import models

	from wagtail.wagtailsnippets.models import register_snippet
	from wagtail.wagtailcore.models import Page
	from modelcluster.fields import ParentalKey
	from wagtail.wagtailadmin.edit_handlers import InlinePanel


	@register_snippet
	class Category(models.Model):

	#!/usr/bin/env python
	# -- coding: utf-8 --
	import sys
	import signal
	from os import system


	### MENU ###
	# Here are all the elements you can import
	# Box elements

	import glob
	import itertools
	import os

	# This is getting ridiculous
	try:
	from pip._internal.req import parse_requirements
	from pip._internal.network.session import PipSession
	except ImportError:
	try:


	What i wanna do:
	- Get all repos from a github organization.
	- Save them to the database.
	- Get all contributors from the repos that we just stored in the database.
	- Create a two way relationship Contributor <-> Project


	# Models.py
	class Project(TimeStampedModel):

	# Python implementation of Aho-Corasick string matching
	#
	# Alfred V. Aho and Margaret J. Corasick, "Efficient string matching: an aid to
	# bibliographic search", CACM, 18(6):333-340, June 1975.
	#
	# <http://xlinux.nist.gov/dads//HTML/ahoCorasick.html>
	#
	# Copyright (C) 2015 Ori Livneh <[email protected]>
	#
	# Licensed under the Apache License, Version 2.0 (the "License");

	#!/usr/bin/env python3

	import csv
	import urllib.request

	from bs4 import BeautifulSoup


	BASE_URL = 'http://www.weblancer.net/projects/'

	from datetime import datetime, timedelta

	def date_range(start, end, step=7, date_format="%m-%d-%Y"):
	"""
	Creates generator with a range of dates.
	The dates occur every 7th day (default).

	:param start: the start date of the date range
	:param end: the end date of the date range
	:param step: the step size of the dates