8000 gh-132952: Import _io instead of io at startup by JelleZijlstra · Pull Request #132957 · python/cpython · GitHub
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gh-132952: Import _io instead of io at startup #132957

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Merged
merged 6 commits into from
Apr 28, 2025
Merged

gh-132952: Import _io instead of io at startup #132957

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dac50cc
gh-132952: Import _io instead of io at startup
JelleZijlstra Apr 25, 2025
e3432b7
Also lazy-import in site
JelleZijlstra Apr 26, 2025
ebe8890
blurb
JelleZijlstra Apr 26, 2025
c3cfa67
Set the __module__ of UnsupportedOperation even if io is not imported
JelleZijlstra Apr 26, 2025
6c40c3a
add test
JelleZijlstra Apr 26, 2025
71bfe4d
Drop 19% claim
JelleZijlstra Apr 28, 2025
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add test
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@JelleZijlstra
JelleZijlstra committed Apr 26, 2025
commit 6c40c3a6d928fc3534d26be1d0cf000021346e83
12 changes: 12 additions & 0 deletions Lib/test/test_site.py
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,7 @@
import test.support
from test import support
from test.support.script_helper import assert_python_ok
from test.support import import_helper
from test.support import os_helper
from test.support import socket_helper
from test.support import captured_stderr
Expand Down Expand Up @@ -574,6 +575,17 @@ def test_license_exists_at_url(self):
code = e.code
self.assertEqual(code, 200, msg="Can't find " + url)

@support.cpython_only
def test_lazy_imports(self):
import_helper.ensure_lazy_imports("site", [
"io",
"locale",
"traceback",
"atexit",
"warnings",
"textwrap",
])


class StartupImportTests(unittest.TestCase):

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