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gh-72327: Suggest using system terminal for pip install in PyREPL (#136328)

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Users new to Python packaging often try to use pip from the REPL only to
be met with a confusing SyntaxError. If this happens, guide the user to
use a system terminal instead to invoke pip.

Closes #72327

---------

Co-authored-by: Tom Viner <tom@viner.tv>
Co-authored-by: Brian Schubert <brianm.schubert@gmail.com>
Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Co-authored-by: Alyssa Coghlan <ncoghlan@gmail.com>
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Richard Si 2025-07-15 10:25:07 -04:00 • committed by GitHub
parent a8f42e6e88
commit be02e68158
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11
Lib/test/test_pyrepl/test_pyrepl.py
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@ -1757,3 +1757,14 @@ def test_showrefcount(self):
output, _ = self.run_repl("1\n1+2\nexit()\n", cmdline_args=['-Xshowrefcount'], env=env)
matches = re.findall(r'\[-?\d+ refs, \d+ blocks\]', output)
self.assertEqual(len(matches), 3)
def test_detect_pip_usage_in_repl(self):
for pip_cmd in ("pip", "pip3", "python -m pip", "python3 -m pip"):
with self.subTest(pip_cmd=pip_cmd):
output, exit_code = self.run_repl([f"{pip_cmd} install sampleproject", "exit"])
self.assertIn("SyntaxError", output)
hint = (
"The Python package manager (pip) can only be used"
" outside of the Python REPL"
)
self.assertIn(hint, output)