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---
# Python 简介
@su27 and @menghan
---

What is Python?

Python: 优雅而健壮的编程语言

高级
易学易读易维护

If you ever need to download an entire website, perhaps for off-line viewing, wget can do the job — for example:

$ wget --recursive --no-clobber --page-requisites --html-extension --convert-links --restrict-file-names=windows --domains website.org --no-parent  www.website.org/tutorials/html/

This command downloads the website www.website.org/tutorials/html/.

The options are:

--recursive: download the entire website
--domains website.org: don't follow links outside website.org

Python Number Conversion Chart

From	To	Expression

Basics

Precedence

There’s none: only evaluation from right to left. Although adverbs and conjunctions are applied first.

Global Variables

=: is like `setq’

gvar =. 23
fun1 =: 3 : 0
gvar + y

	<table>
	<caption>打开/前往</caption>
	<colgroup>
	<col style="text-align:left;width:150px"/>
	<col style="text-align:left;"/>
	</colgroup>
	<thead>
	<tr>
	<th scope="col">快捷键</th>
	<th scope="col">说明</th>

	<?xml version="1.0"?>
	<root>
	<item>
	<name>Shifts to Parentheses</name>
	<appendix>Shifts, when pressed alone, type parentheses. When used with other keys they're normal shifts.</appendix>

	<identifier>private.shifts_to_parens</identifier>

	<!-- This is the basic mapping. -->
	<autogen>--KeyOverlaidModifier-- KeyCode::SHIFT_R, ModifierFlag::SHIFT_R \| ModifierFlag::NONE, KeyCode::SHIFT_R, KeyCode::MINUS, ModifierFlag::NONE</autogen>

	#!/usr/bin/env python
	# link: http://www.emacswiki.org/emacs/PythonMode#toc7
	#
	# This is a script which runs and parses the output of various Python code
	# checking programs to work with flymake. It has lots of issues, one being that
	# flymake does not seem to show more than one error message per line of code,
	# meaning that an error or warning which is intentionally left unfixed can mask
	# an error or warning that would get more attention.
	#
	# Additionally, the scripts which check python code are either rather anemic,

	// Node.js CheatSheet.
	// Download the Node.js source code or a pre-built installer for your platform, and start developing today.
	// Download: http://nodejs.org/download/
	// More: http://nodejs.org/api/all.html


	// 0. Synopsis.
	// http://nodejs.org/api/synopsis.html

	// XPath CheatSheet
	// To test XPath in your Chrome Debugger: $x('/html/body')
	// http://www.jittuu.com/2012/2/14/Testing-XPath-In-Chrome/


	// 0. XPath Examples.
	// More: http://xpath.alephzarro.com/content/cheatsheet.html


	'//hr[@class="edge" and position()=1]' // every first hr of 'edge' class

	# Your init script
	#
	# Atom will evaluate this file each time a new window is opened. It is run
	# after packages are loaded/activated and after the previous editor state
	# has been restored.
	#
	# An example hack to log to the console when each text editor is saved.
	#
	# atom.workspace.observeTextEditors (editor) ->
	# editor.onDidSave ->