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gh-139707: Better ModuleNotFoundError message for missing stdlib modules (GH-140219)

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Stan Ulbrych 2025-10-21 08:12:04 +01:00 • committed by GitHub
parent b2f9fb9db2
commit 47d2f68df2
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3 changed files with 24 additions and 7 deletions
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16
Lib/test/test_traceback.py
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@ -5034,7 +5034,8 @@ def test_no_site_package_flavour(self):
self.assertIn(
(b"Site initialization is disabled, did you forget to "
b"add the site-packages directory to sys.path?"), stderr
b"add the site-packages directory to sys.path "
b"or to enable your virtual environment?"), stderr
)
code = """
@ -5046,9 +5047,20 @@ def test_no_site_package_flavour(self):
self.assertNotIn(
(b"Site initialization is disabled, did you forget to "
b"add the site-packages directory to sys.path?"), stderr
b"add the site-packages directory to sys.path "
b"or to enable your virtual environment?"), stderr
)
def test_missing_stdlib_package(self):
code = """
import sys
sys.stdlib_module_names |= {'spam'}
import spam
"""
_, _, stderr = assert_python_failure('-S', '-c', code)
self.assertIn(b"Standard library module 'spam' was not found", stderr)
class TestColorizedTraceback(unittest.TestCase):
maxDiff = None