Merge #14399: corrected news item

1 files changed, 14 insertions, 0 deletions

diff --git a/Lib/idlelib/run.py b/Lib/idlelib/run.py
index 25338ffaa6..7124c72a63 100644
--- a/Lib/idlelib/run.py
+++ b/Lib/idlelib/run.py
@@ -6,6 +6,7 @@ import traceback
 import _thread as thread
 import threading
 import queue
+import tkinter
 
 from idlelib import CallTips
 from idlelib import AutoComplete
@@ -38,6 +39,17 @@ else:
         return s
     warnings.formatwarning = idle_formatwarning_subproc
 
+
+tcl = tkinter.Tcl()
+
+
+def handle_tk_events(tcl=tcl):
+    """Process any tk events that are ready to be dispatched if tkinter
+    has been imported, a tcl interpreter has been created and tk has been
+    loaded."""
+    tcl.eval("update")
+
+
 # Thread shared globals: Establish a queue between a subthread (which handles
 # the socket) and the main thread (which runs user code), plus global
 # completion, exit and interruptable (the main thread) flags:
@@ -93,6 +105,7 @@ def main(del_exitfunc=False):
             try:
                 seq, request = rpc.request_queue.get(block=True, timeout=0.05)
             except queue.Empty:
+                handle_tk_events()
                 continue
             method, args, kwargs = request
             ret = method(*args, **kwargs)
@@ -254,6 +267,7 @@ class MyHandler(rpc.RPCHandler):
         sys.stdin = self.console = self.get_remote_proxy("stdin")
         sys.stdout = self.get_remote_proxy("stdout")
         sys.stderr = self.get_remote_proxy("stderr")
+        sys.displayhook = rpc.displayhook
         # page help() text to shell.
         import pydoc # import must be done here to capture i/o binding
         pydoc.pager = pydoc.plainpager