check "noselect" and "noinsert" before <C-p>

to prevent from selecting last option check "noselect" and "noinsert" before <C-p>
  @see https://github.com/Shougo/neocomplete.vim/blob/master/doc/neocomplete.txt#L1817-L1826

AUTHORS.txt

@@ -48,6 +48,6 @@ Pedro Ferrari (@petobens)
 Daniel Hahler (@blueyed)
 Dave Honneffer (@pearofducks)
 Bagrat Aznauryan (@n9code)
-
+Tomoyuki Kashiro (@kashiro)
 
 @something are github user names.

autoload/jedi.vim

@@ -491,8 +491,10 @@ function! jedi#complete_opened(is_popup_on_dot)
             return "\<Down>"
         endif
         if a:is_popup_on_dot
-            " Prevent completion of the first entry with dot completion.
-            return "\<C-p>"
+            if &completeopt !~ '\(noinsert\|noselect\)'
+                " Prevent completion of the first entry with dot completion.
+                return "\<C-p>"
+            endif
         endif
     endif
     return ""