[3.15] gh-158067: Keep Python files first in IDLE Open dialog from Shell (GH-158071) (#158143)

Co-authored-by: Lazizbek Ergashev <lazerg2@gmail.com>

Author: miss-islington

Lib/idlelib/idle_test/test_outwin.py

@@ -46,7 +46,11 @@ def test_save_defaults_to_text(self):
         io = self.window.io
         self.assertEqual(io.defaultextension, '.txt')
         # Text files are offered before Python files.
-        self.assertEqual(io.filetypes[0][0], 'Text files')
+        self.assertEqual(io.save_filetypes[0][0], 'Text files')
+
+    def test_open_defaults_to_python(self):
+        # gh-158067: File Open still lists Python files first.
+        self.assertEqual(self.window.io.filetypes[0][0], 'Python files')
 
     def test_window_title(self):
         self.assertEqual(self.window.top.title(), 'Output' + ' (%s)' % platform.python_version())

Lib/idlelib/iomenu.py

@@ -384,8 +384,10 @@ def print_window(self, event):
         ("All files", "*"),
         )
 
-    # Output windows (Shell, Output) are not Python source, so they list
-    # text files first and default to ".txt" (gh-65339).
+    save_filetypes = filetypes
+
+    # Output windows (Shell, Output) are not Python source, so they save
+    # with text files listed first and default to ".txt" (gh-65339).
     text_filetypes = (
         ("Text files", "*.txt", "TEXT"),
         ("Python files", py_extensions, "TEXT"),
@@ -420,7 +422,7 @@ def asksavefile(self):
         if not self.savedialog:
             self.savedialog = filedialog.SaveAs(
                     parent=self.text,
-                    filetypes=self.filetypes,
+                    filetypes=self.save_filetypes,
                     defaultextension=self.defaultextension)
         filename = self.savedialog.show(initialdir=dir, initialfile=base)
         return filename

Lib/idlelib/outwin.py

@@ -80,7 +80,7 @@ def __init__(self, *args):
         self.text.bind("<<goto-file-line>>", self.goto_file_line)
         # Output is not Python source, so save it as text by default
         # (gh-65339).
-        self.io.filetypes = self.io.text_filetypes
+        self.io.save_filetypes = self.io.text_filetypes
         self.io.defaultextension = self.io.text_defaultextension
 
     # Customize EditorWindow

Misc/NEWS.d/next/IDLE/2026-09-24-12-00-00.gh-issue-158067.opnPy1.rst

@@ -0,0 +1,2 @@
+Fix the IDLE File Open dialog listing text files before Python files when
+opened from the Shell or an Output window.