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gh-141615: Check stdin instead of stdout for use_rawinput in pdb #141616

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gh-141615: Check stdin instead of stdout for use_rawinput in pdb #141616

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13acb60
Check stdin instead of stdout for use_rawinput in pdb
gaogaotiantian Nov 16, 2025
ecf59a7
📜🤖 Added by blurb_it.
blurb-it[bot] Nov 16, 2025
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4 changes: 2 additions & 2 deletions Lib/pdb.py
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Original file line number Diff line number Diff line change
Expand Up @@ -346,8 +346,8 @@ def __init__(self, completekey='tab', stdin=None, stdout=None, skip=None,
bdb.Bdb.__init__(self, skip=skip, backend=backend if backend else get_default_backend())
cmd.Cmd.__init__(self, completekey, stdin, stdout)
sys.audit("pdb.Pdb")
if stdout:
self.use_rawinput = 0
if stdin:
self.use_rawinput = False
self.prompt = '(Pdb) '
self.aliases = {}
self.displaying = {}
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13 changes: 13 additions & 0 deletions Lib/test/test_pdb.py
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Expand Up @@ -4710,6 +4710,19 @@ def test_readline_not_imported(self):
self.assertNotIn("readline imported", stdout)
self.assertEqual(stderr, "")

def test_alternate_stdin(self):
script = textwrap.dedent("""
import pdb
import io

input_data = io.StringIO("p 40 + 2\\nc\\n")
pdb.Pdb(stdin=input_data).set_trace()
""")
commands = ""
stdout, stderr = self._run_script(script, commands)
self.assertIn("42", stdout)
self.assertEqual(stderr, "")


@support.force_colorized_test_class
class PdbTestColorize(unittest.TestCase):
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2025-11-16-06-08-46.gh-issue-141615.--6EK3.rst
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@@ -0,0 +1 @@
Check ``stdin`` instead of ``stdout`` for ``use_rawinput`` in :mod:`pdb`.
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