turn syntax highlighting on again if it's turned off by renaming (possible vim bug).

autoload/jedi.vim

@@ -96,6 +96,9 @@ function! jedi#new_buffer(path)
         endif
         Python vim.command('edit ' + jedi_vim.escape_file_path(vim.eval('a:path')))
     endif
+    " sometimes syntax is being disabled and the filetype not set.
+    syntax on
+    set filetype=python
 endfunction
 
 function! s:add_goto_window()

plugin/jedi_vim.py

@@ -12,8 +12,6 @@ import jedi
 import jedi.keywords
 from jedi._compatibility import unicode
 
-temp_rename = None  # used for jedi#rename
-
 
 class PythonToVimStr(unicode):
     """ Vim has a different string implementation of single quotes """
@@ -257,9 +255,7 @@ def show_func_def(call_def=None, completion_lines=0):
 
 
 def rename():
-    global temp_rename
     if not int(vim.eval('a:0')):
-        temp_rename = goto(is_related_name=True, no_output=True)
         _rename_cursor = vim.current.window.cursor
 
         vim.command('normal A ')  # otherwise startinsert doesn't work well
@@ -284,6 +280,7 @@ def rename():
         if replace is None:
             echo_highlight('No rename possible, if no name is given.')
         else:
+            temp_rename = goto(is_related_name=True, no_output=True)
             # sort the whole thing reverse (positions at the end of the line
             # must be first, because they move the stuff before the position).
             temp_rename = sorted(temp_rename, reverse=True,
@@ -291,17 +288,16 @@ def rename():
             for r in temp_rename:
                 if r.in_builtin_module():
                     continue
+
                 if vim.current.buffer.name != r.module_path:
                     vim.eval("jedi#new_buffer('%s')" % r.module_path)
 
                 vim.current.window.cursor = r.start_pos
                 vim.command('normal! cw%s' % replace)
 
-            vim.current.window.cursor = cursor
             vim.eval("jedi#new_buffer('%s')" % window_path)
+            vim.current.window.cursor = cursor
             echo_highlight('Jedi did %s renames!' % len(temp_rename))
-        # reset rename variables
-        temp_rename = None
 
 
 def tabnew(path):