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[3.15] gh-60402: Fix Tab in a string in IDLE (GH-157593) #157630

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Merged
terryjreedy merged 1 commit into from
Oct 9, 2026
Merged

[3.15] gh-60402: Fix Tab in a string in IDLE (GH-157593) #157630

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4 changes: 4 additions & 0 deletions Lib/idlelib/autocomplete.py
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Original file line number Diff line number Diff line change
Expand Up @@ -153,6 +153,10 @@ def open_completions(self, args):
comp_lists = self.fetch_completions(comp_what, mode)
if not comp_lists[0]:
return None
if (complete and mode == FILES
and not any(name.startswith(comp_start)
for name in comp_lists[0])):
return None
self.autocompletewindow = self._make_autocomplete_window()
return not self.autocompletewindow.show_window(
comp_lists, "insert-%dc" % len(comp_start),
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6 changes: 6 additions & 0 deletions Lib/idlelib/idle_test/test_autocomplete.py
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Expand Up @@ -218,6 +218,12 @@ def make_acw(): return self.dummy_acw()
self.assertTrue(acp.open_completions(ac.TAB))
self.text.delete('1.0', 'end')

# No file name starts with the text (gh-60402).
self.text.insert('1.0', '"hello wor')
self.assertIsNone(acp.open_completions(ac.TAB))
self.assertTrue(acp.open_completions(ac.FORCE))
self.text.delete('1.0', 'end')

def test_completion_kwds(self):
self.assertIn('and', ac.completion_kwds)
self.assertIn('case', ac.completion_kwds)
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/IDLE/2026-09-15-21-44-35.gh-issue-60402.iFz6X6.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
In IDLE, Tab in a string that is not the start of a file name inserts a tab
instead of opening the completion list.
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