[Python-checkins] [3.6] IDLE: make filetypes a tuple constant. (GH-3847) (#3848)

[Terry Jan Reedy]

https://github.com/python/cpython/commit/c0418160457970c4654ad8d910cd0ad21a02f3f7
commit: c0418160457970c4654ad8d910cd0ad21a02f3f7
branch: 3.6
author: Terry Jan Reedy <tjreedy at udel.edu>
committer: GitHub <noreply at github.com>
date: 2017-10-01T19:37:19-04:00
summary:

[3.6] IDLE: make filetypes a tuple constant. (GH-3847) (#3848)

Save a bit of code, plus non-tuples get converted anyway to tuples by tkinter for the tk call.
(cherry picked from commit 5961e7c156f90c7f9444ae95b9d3e55114ca2169)

files:
M Lib/idlelib/iomenu.py

diff --git a/Lib/idlelib/iomenu.py b/Lib/idlelib/iomenu.py
index 3414c7b3aff..f9b6907b40c 100644
--- a/Lib/idlelib/iomenu.py
+++ b/Lib/idlelib/iomenu.py
@@ -487,11 +487,11 @@ def print_window(self, event):
     opendialog = None
     savedialog = None
 
-    filetypes = [
+    filetypes = (
         ("Python files", "*.py *.pyw", "TEXT"),
         ("Text files", "*.txt", "TEXT"),
         ("All files", "*"),
-        ]
+        )
 
     defaultextension = '.py' if sys.platform == 'darwin' else ''