IDLE: make filetypes a tuple constant. (#3847)

terryjreedy · web-flow · commit 5961e7c156f9 · 2017-10-01T19:01:27.000-04:00
Save a bit of code, plus non-tuples get converted anyway to tuples by tkinter for the tk call.
diff --git 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 ''
 
