emacs中集成Python

1. 安装YASnippet

YASnippet是一个模板自动生成工具。安装YASnippet只需M-x list-package，之后选择YASnippet并且安装即可。之后在.emacs文件中写入

===========================================================

(add-to-list 'load-path "~/.emacs.d/elpa/yasnippet/")

(require 'yasnippet)

(yas-global-mode 1)

============================================================

2. 安装auto-completion.el

首先进入auto-completion.el的官网（自己搜），把auto-complete的安装包下下来，然后根据安装文档做就行了，之后在.emacs中添加（很多网上把(add-to-list 'ac-dictionary-directories "~/.emacs.d/ac-dict") 放到上面去，结果报错。解决方案就是放到最后一行，让(require 'auto-complete-config)先执行。）

=========================================================================

(add-to-list 'load-path "~/.emacs.d")
(require 'auto-complete-config)
(ac-config-default)
(add-to-list 'ac-dictionary-directories "~/.emacs.d/ac-dict") 

==============================================================================

3. 安装python-mode。安装同auto-completion.el，把包下下来放到~/.emacs.d/plugins中。然后在~/.emacs文件中添加如下内容

==============================================

(add-to-list 'load-path "~/.emacs.d/plugins/python-mode.el-6.1.3")
(require 'python-mode)
(add-to-list 'auto-mode-alist '("\.py\'" . python-mode))

==============================================

4. 安装ipython。

首先安装ipython：

# yum install ipython

emac24 以上在Python.el中带有ipython，直接激活就行。在~/.emacs中添加：

============================

require 'python)
(setq python-shell-interpreter "ipython")
(setq python-shell-interpreter-args "--pylab")

============================

5. 安装python的帮助文档

首先，下载python的HTML帮助文档http://docs.python.org/download.html（可能被墙）；之后，从https://github.com/tsgates/pylookup下载pylookup，参考README文档（注意可以更新或者添加帮助文档）；生成.db帮助文档，$./pylookup.py -u python-2.7.1-docs-html；之后，将pylookup.py、pylookup.db和pylookup.el放入~/.emacs.d的文件夹下，比如放入“~/emacs.d/plugins/pylookup”；修改.emacs文档，设定查找快捷键C-c h：

==============================================================

(setq pylookup-dir "~/.emacs.d/plugins/pylookup")

(add-to-list 'load-path pylookup-dir)

(require 'pylookup)

;; load pylookup when compile time

(eval-when-compile (require 'pylookup))

;; set executable file and db file

(setq pylookup-program (concat pylookup-dir "/pylookup.py"))

(setq pylookup-db-file (concat pylookup-dir "/pylookup.db"))

;; set search option if you want

;; (setq pylookup-search-options '("--insensitive" "0" "--desc" "0"))

;; to speedup, just load it on demand

(autoload 'pylookup-lookup "pylookup"

  "Lookup SEARCH-TERM in the Python HTML indexes." t)

(autoload 'pylookup-update "pylookup" 

  "Run pylookup-update and create the database at `pylookup-db-file'." t)

(global-set-key "\C-ch" 'pylookup-lookup)

============================================================              

6. 安装其他自动补全

首先，安装pylint和pep8

# yum install pylint

# easy_install pep8

安装之后，下载pylint和pep8的源码包，放到plugins中，之后在~/.emacs中添加：pep8只能下载到python-pep8.el,直接扔到plugins中

=========================================================

(add-to-list 'load-path "~/.emacs.d/plugins/pylint-1.3.0/elisp")
(require 'pylint)

(add-to-list 'load-path "~/.emacs.d/plugins/")
(require 'python-pep8)

==========================================================

7. 安装anything

根据以下网站安装anything: http://www.emacswiki.org/emacs/Anything#toc5。一种方法是将anything-config包整体下载在~/.emacs.d/plugins/文件夹下。之后，下载anything-ipython.el文件http://www.emacswiki.org/emacs-en/download/anything-ipython.el，存放至anything-config文件夹下。在.emacs文件夹下添加：

================================================

(add-to-list 'load-path "~/.emacs.d/plugins/anything-config")

(require 'anything-config)

(require 'anything-ipython)

(when (require 'anything-show-completion nil t)

   (use-anything-show-completion 'anything-ipython-complete

                                 '(length initial-pattern)))

================================================

解决bug：

1. 在运行ipython时候，可能会出现“File mode specification error: (file-error "Cannot open load file" "~/.emacs.d/abbrev_defs")”的错误，这是因为缺少一个名为“abbrev_defs”的文件。相关Bug讨论https://bugs.launchpad.net/python-mode/+bug/1015713。解决办法：M-x edit-abbrevs，之后保存，就会出现

“abbrev_defs”文件。

2. 运行pep8时候，可能会出现“Symbol's function definition is void: tramp-tramp-file-p”的提示，bug讨论http://x.thexs.us/2011/06/17/pep8-error-tramp-tramp-file-p/。解决办法：在.emacs文件中添加(require 'tramp)即可。

3. 使用C-c C-c启动ipython时，会出现“Symbol's value as variable is void: py-mode-map”的报错。但是，再次执行以下C-c C-c之后，就可以启动ipython。不知道这个bug产生的原因和解决办法。

使用方法：

1. C-c C-c：将整个buffer送入ipython执行；

2. 选定要运行的区域，之后C-c |：ipython中执行选定的区域；

3. M-p/M-n：自动补全时上下选择；

4. TAB：补全；

5. M-x pep8：运行检查pep8代码风格；M-x '：跳到下一个代码错误处；M-x pylint：作用类似pep8；

6. C-c h：查询帮助文档HTML格式；

参考网址：

1. http://ranjiao.com/blog/index.php/2009/配置emacs下的python开发环境/

2. http://hide1713.wordpress.com/2009/01/30/setup-perfect-python-environment-in-emacs/

3. http://pedrokroger.com/2010/07/configuring-emacs-as-a-python-ide-2/

4. 关于emacs设置ipythonhttp://ipython.org/ipython-doc/stable/config/editors.html

5. http://www.cnblogs.com/bamanzi/archive/2011/07/10/emacs-for-python-wishlist.html

6. 视频介绍 https://www.youtube.com/watch?v=6BlTGPsjGJk