如何更改Elpy自动完成框的颜色,而不首先显示私有变量

我试图让Emacs 24.3.1在Ubuntu 14.04上运行,并为Python开发配置 elpy 用于自动完成。目前我面临两个问题。这两个都可以在截图中看到:

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颜色方案很难使用,并且私有方法总是出现在列表的第一位。

emacs init中的相关行是:

;;pop-ups                                                                                             
(require 'popup)

;;;python-mode                                                                                        
(require 'package)
(add-to-list 'package-archives
         '("elpy" . "http://jorgenschaefer.github.io/packages/"))
(elpy-enable)
;; Fixing a key binding bug in elpy                                                                   
(define-key yas-minor-mode-map (kbd "C-c k") 'yas-expand)
(define-key global-map (kbd "C-c o") 'iedit-mode)
;;Use jedi for autocomplete                                                                           
(setq elpy-rpc-backend "jedi")

(setq py-install-directory "~/.emacs.d/python-mode.el-6.1.3")
(add-to-list 'load-path py-install-directory)
(require 'python-mode)

; use IPython                                                                                         
(setq-default py-shell-name "ipython")
(setq-default py-which-bufname "IPython")
; use the wx backend, for both mayavi and matplotlib                                                  
(setq py-python-command-args
  '("--gui=wx" "--pylab=wx" "-colors" "Linux"))
(setq py-force-py-shell-name-p t)

; switch to the interpreter after executing code                                                      
(setq py-shell-switch-buffers-on-execute-p t)
(setq py-switch-buffers-on-execute-p t)
; don't split windows                                                                                 
(setq py-split-windows-on-execute-p nil)
; try to automagically figure out indentation                                                         
(setq py-smart-indentation t)
;; Jedi backend                                                                                       
(add-hook 'python-mode-hook 'jedi:setup)
(setq jedi:complete-on-dot t) ;optional                                                               
(add-hook 'python-mode-hook 'auto-complete-mode)
(add-hook 'python-mode-hook 'jedi:ac-setup)

如果能在这些问题上提供任何帮助,我们将不胜感激。