commit bbc4162bafe018f07bab0b624b37974cc33daad9
author JohnnyNajera <58344607+JohnnyNajera@users.noreply.github.com> Tue Dec 10 02:30:01 2019 +0200
committer Terry Jan Reedy <tjreedy@udel.edu> Mon Dec 09 19:30:01 2019 -0500
tree 99ebb8261ddb5acfa989058b1edab6364b33eac1
parent 232689b40d8fcbbac27c8705607ff482ea5b46f8

bpo-38943: Fix IDLE autocomplete window not always appearing (GH-17416)

This has happened on some versions of Ubuntu.

Lib/idlelib/autocomplete_w.py

diff --git a/Lib/idlelib/autocomplete_w.py b/Lib/idlelib/autocomplete_w.py
index f20b633..0643c09 100644
--- a/Lib/idlelib/autocomplete_w.py
+++ b/Lib/idlelib/autocomplete_w.py
@@ -257,6 +257,7 @@
             # place acw above current line
             new_y -= acw_height
         acw.wm_geometry("+%d+%d" % (new_x, new_y))
+        acw.update_idletasks()
 
         if platform.system().startswith('Windows'):
             # See issue 15786. When on Windows platform, Tk will misbehave