commit eaa7e7825e9f4b211bc104cfde6cc951f9dcb94e
author Terry Jan Reedy <tjreedy@udel.edu> Sat May 26 20:33:32 2012 -0400
committer Terry Jan Reedy <tjreedy@udel.edu> Sat May 26 20:33:32 2012 -0400
tree 752a64ab668341f85f10fb2ace95a4b293e18b2b
parent 42f7b7ecb2cd2e0c3d62315f033639b2ad8bacd9

Issue #10365: File open dialog now works instead of crashing
even when parent window is closed. Patch by Roger Serwy.

Lib/idlelib/PyShell.py

diff --git a/Lib/idlelib/PyShell.py b/Lib/idlelib/PyShell.py
index eeb33e1..eec0b70 100644
--- a/Lib/idlelib/PyShell.py
+++ b/Lib/idlelib/PyShell.py
@@ -1458,7 +1458,8 @@
     if tkversionwarning:
         shell.interp.runcommand(''.join(("print('", tkversionwarning, "')")))
 
-    root.mainloop()
+    while flist.inversedict:  # keep IDLE running while files are open.
+        root.mainloop()
     root.destroy()
 
 if __name__ == "__main__":