IDLE 3.14.7 FileOpenDialog preselection is `Text files (*.txt)`

[beta-tester]

Bug report

Bug description:

Hi, i am using Python 3.14.7 IDLE under windows 11 25h2. every time i open the IDLE and go to File | Open a file open dialob opens but there is not any python file shown in the file list of the dialog, because the file type preselection is initially always at Text files (*.txt). i have to change that preselection to Python files (*,py,...) to get python files listed in the file list. this setting is kept until i close an reopen the IDLE. then the preselection is back to Text files (*.txt)

i installed the IDLE on windows via:

winget install Python.Python.3.14

CPython versions tested on:

3.14.7 (also 3.13.15)

Operating systems tested on:

Windows

Linked PRs

• gh-158067: Keep Python files first in IDLE Open dialog from Shell #158071
• [3.13] gh-158067: Keep Python files first in IDLE Open dialog from Shell (GH-158071) #158141
• [3.14] gh-158067: Keep Python files first in IDLE Open dialog from Shell (GH-158071) #158142
• [3.15] gh-158067: Keep Python files first in IDLE Open dialog from Shell (GH-158071) #158143

[terryjreedy]

When saving an output window (find in files) or Shell, the default extension in .txt (gh-65339). But open should be .py as one in not opening into the shell. This should be a simple fix once the right place in iomenu is found.