Haseeb ur Rahman haseebr

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.

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	SPC s c remove highlight

	**** Files manipulations key bindings
	Files manipulation commands (start with ~f~):

	\| Key Binding \| Description \|
	\|-------------+----------------------------------------------------------------\|
	\| ~SPC f c~ \| copy current file to a different location \|
	\| ~SPC f C d~ \| convert file from unix to dos encoding \|
	\| ~SPC f C u~ \| convert file from dos to unix encoding \|

	function Set-WindowState {
	param(
	[Parameter()]
	[ValidateSet('FORCEMINIMIZE', 'HIDE', 'MAXIMIZE', 'MINIMIZE', 'RESTORE',
	'SHOW', 'SHOWDEFAULT', 'SHOWMAXIMIZED', 'SHOWMINIMIZED',
	'SHOWMINNOACTIVE', 'SHOWNA', 'SHOWNOACTIVATE', 'SHOWNORMAL')]
	[Alias('Style')]
	[String] $State = 'SHOW',

	[Parameter(ValueFromPipelineByPropertyname='True')]

	sudo apt-get remove --purge vim vim-runtime vim-gnome vim-tiny vim-common vim-gui-common

	sudo apt-get build-dep vim-gnome

	sudo apt-get install liblua5.1-dev luajit libluajit-5.1 python-dev ruby-dev libperl-dev libncurses5-dev libgnome2-dev libgnomeui-dev libgtk2.0-dev libatk1.0-dev libbonoboui2-dev libcairo2-dev libx11-dev libxpm-dev libxt-dev

	sudo rm -rf /usr/local/share/vim

	sudo rm /usr/bin/vim