added auto configuration of VIM setting -> fixes #52

README.rst

@@ -62,6 +62,11 @@ you disable the auto-initialization in your ``.vimrc``::
 
     let g:jedi#auto_initialization = 0
 
+There are also some VIM options (like ``completeopt``) which are automatically
+initialized, if you don't want that:
+
+    let g:jedi#auto_vim_configuration = 0
+
 The goto is by default on <leader g>. If you want to change that::
 
     let g:jedi#goto_command = "<leader>g"

ftplugin/python/jedi.vim

@@ -24,6 +24,10 @@ if g:jedi#auto_initialization
     endif
 end
 
+if g:jedi#auto_vim_configuration
+    setlocal completeopt=menuone,longest,preview
+end
+
 if g:jedi#popup_on_dot
     if stridx(&completeopt, 'longest') > -1
         inoremap <buffer> . .<C-R>=jedi#do_popup_on_dot() ? "\<lt>C-X>\<lt>C-O>" : ""<CR>

plugin/jedi.vim

@@ -22,6 +22,7 @@ let g:loaded_jedi = 1
 let s:settings = {
     \ 'use_tabs_not_buffers': 1,
     \ 'auto_initialization': 1,
+    \ 'auto_vim_configuration': 1,
     \ 'goto_command': "'<leader>g'",
     \ 'get_definition_command': "'<leader>d'",
     \ 'related_names_command': "'<leader>n'",