Emacs configuration for Python development. Simply drop this file inside your $HOME/.emacs.d directory and enjoy it!

.emacs

;;; package --- Emacs configuration for Python developement
;;; Commentary:

;;; Code:

;; Disable a couple of menus and startup message
(if (fboundp 'menu-bar-mode) (menu-bar-mode -1))
(if (fboundp 'tool-bar-mode) (tool-bar-mode -1))
(if (fboundp 'scroll-bar-mode) (scroll-bar-mode -1))
(setq inhibit-startup-message t)

(require 'package)

(add-to-list 'package-archives
             '("marmalade" . "http://marmalade-repo.org/packages/") t)
(add-to-list 'package-archives
             '("melpa" . "http://melpa.milkbox.net/packages/") t)
(package-initialize)

(when (not package-archive-contents)
  (package-refresh-contents))

;; Add in your own as you wish:
(defvar my-packages '(ack-and-a-half
                      ample-zen-theme
                      auto-complete
                      evil-nerd-commenter
                      flymake
                      flymake-cursor
                      flymake-puppet
                      flymake-python-pyflakes
                      git-gutter
                      iedit
                      ido-ubiquitous
                      jedi
                      magit
                      markdown-mode
                      monokai-theme
                      multi-term
                      popup
                      projectile
                      pyflakes
                      pylint
                      rainbow-delimiters
                      rainbow-mode
                      smartparens
                      smooth-scrolling
                      starter-kit
                      starter-kit-bindings
                      starter-kit-lisp
                      yasnippet
                      virtualenv
                      whitespace-cleanup-mode)
  "A list of packages to ensure are installed at launch.")

(dolist (p my-packages)
  (when (not (package-installed-p p))
    (package-install p)))

;; Theme selection
(load-theme 'ample-zen t)
;; (load-theme 'monokai t)
;; (load-theme 'solarized-dark)


;; Setup multi-term
(setq multi-term-program "/bin/zsh")

;; Setup evil-nerd-commenter
(evilnc-default-hotkeys)

;; Setup yasnippet
(add-to-list 'load-path
             "~/.emacs.d/plugins/yasnippet")
(require 'yasnippet)
(yas-global-mode 1)

;; setup flymake
(require 'flymake-python-pyflakes)
(require 'flymake-cursor)
(setq flymake-python-pyflakes-executable "flake8")

;; Handles whitespace, tabs, etc
(setq-default show-trailing-whitespace t)
(add-hook 'before-save-hook 'delete-trailing-whitespace)

;; Projectile for git management
(projectile-global-mode)
(defalias 'ack 'ack-and-a-half)
;; Enable git-gutter
(global-git-gutter-mode t)


;; auto-complete
(autoload 'ac-config-default "auto-complete-config")
(ac-config-default)

(eval-after-load "auto-complete"
  '(add-to-list 'ac-modes `python-mode))

;; Make sure to run pip install jedi epc flake8
;; Jedi settings
(add-hook 'python-mode-hook 'jedi:setup)
(setq jedi:complete-on-dot t)

;;; Smart parens
(smartparens-global-mode t)

;;; Python stuff
(add-hook 'python-mode-hook
            (lambda ()
              (require 'virtualenv)
              (flymake-python-pyflakes-load)
              (rainbow-delimiters-mode)
              (auto-complete-mode)
              (rainbow-delimiters-mode)
              (whitespace-mode)
              (whitespace-cleanup-mode)
              ;; Automatic pairing of delimeters
              (define-key python-mode-map "\"" 'electric-pair)
              (define-key python-mode-map "\'" 'electric-pair)
              (define-key python-mode-map "(" 'electric-pair)
              (define-key python-mode-map "[" 'electric-pair)
              (define-key python-mode-map "{" 'electric-pair)
              (define-key python-mode-map "\C-m" 'newline-and-indent)))

(defun electric-pair ()
  "Insert character pair without surounding spaces"
  (interactive)
  (let (parens-require-spaces)
    (insert-pair)))

;; Default tab and indentation behavior
(setq-default indent-tabs-mode nil)
(setq-default tab-width 4)

(defun python-add-breakpoint ()
  "Add a break point"
  (interactive)
  (newline-and-indent)
  (insert "import epdb; epdb.st()")
  (hightlight-lines-matching-regexp "^[]*import epdb; epdb.st()"))
(global-set-key [f2] 'python-add-breakpoint)

(defun datestamp ()
  (interactive)
  (call-process "date" nil t nil "+%a %b %d %Z %Y"))

(global-set-key (kbd "<f6>") 'datestamp)
(setq magit-auto-revert-mode nil)
(global-set-key [f1] 'magit-status)

;; Handles sourcing ZSH
(let ((path (shell-command-to-string ". ~/.zshrc; echo -n $PATH")))
  (setenv "PATH" path)
  (setq exec-path
        (append
         (split-string-and-unquote path ":")
         exec-path)))

;; Fixing a key binding bug in elpy
(define-key yas-minor-mode-map (kbd "C-c k") 'yas-expand)


(setenv "PYTHONPATH" "/home/omaciel/hacking:/home/omaciel/Dropbox/Hacking:/home/omaciel:/home/omaciel/hacking/katello-cli/src")

README.rst

Emacs configuration for Python development. Simply drop this file in your $HOME directory as .emacs and enjoy it!

Requirements

Before you start Emacs for the first time, you will want to:

• Make sure to install the following python libraries

pip install jedi epc flake8

Jan. 14th, 2014: updated init.el to include instructions for installing pymacs as well as some other changes.