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gh-157763: Soft-deprecate ctypes.util.test #157776

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Merged
ZeroIntensity merged 3 commits into from
Sep 19, 2026
+7 −52
Merged

gh-157763: Soft-deprecate ctypes.util.test #157776

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e64dbea
Soft-deprecate ctypes.util.test()
ZeroIntensity Sep 18, 2026
47eb8fb
Add blurb.
ZeroIntensity Sep 18, 2026
541c68d
Stupid ruff.
ZeroIntensity Sep 19, 2026
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57 changes: 5 additions & 52 deletions Lib/ctypes/util.py
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Original file line number Diff line number Diff line change
Expand Up @@ -416,7 +416,7 @@ def find_library(name):
# On platforms which provide dl_iterate_phdr(), dllist() is implemented
# in _ctypes.
try:
from _ctypes import dllist
from _ctypes import dllist as dllist
except ImportError:
pass

Expand Down Expand Up @@ -525,55 +525,8 @@ def decorator(func):

return decorator

################################################################
# test code

def test():
from ctypes import cdll
if os.name == "nt":
print(cdll.msvcrt)
print(cdll.load("msvcrt"))
print(find_library("msvcrt"))

if os.name == "posix":
# find and load_version
print(find_library("m"))
print(find_library("c"))
print(find_library("bz2"))

# load
if sys.platform == "darwin":
print(cdll.LoadLibrary("libm.dylib"))
print(cdll.LoadLibrary("libcrypto.dylib"))
print(cdll.LoadLibrary("libSystem.dylib"))
print(cdll.LoadLibrary("System.framework/System"))
# issue-26439 - fix broken test call for AIX
elif sys.platform.startswith("aix"):
from ctypes import CDLL
if sys.maxsize < 2**32:
print(f"Using CDLL(name, os.RTLD_MEMBER): {CDLL('libc.a(shr.o)', os.RTLD_MEMBER)}")
print(f"Using cdll.LoadLibrary(): {cdll.LoadLibrary('libc.a(shr.o)')}")
# librpm.so is only available as 32-bit shared library
print(find_library("rpm"))
print(cdll.LoadLibrary("librpm.so"))
else:
print(f"Using CDLL(name, os.RTLD_MEMBER): {CDLL('libc.a(shr_64.o)', os.RTLD_MEMBER)}")
print(f"Using cdll.LoadLibrary(): {cdll.LoadLibrary('libc.a(shr_64.o)')}")
print(f"crypt\t:: {find_library('crypt')}")
print(f"crypt\t:: {cdll.LoadLibrary(find_library('crypt'))}")
print(f"crypto\t:: {find_library('crypto')}")
print(f"crypto\t:: {cdll.LoadLibrary(find_library('crypto'))}")
else:
print(cdll.LoadLibrary("libm.so"))
print(cdll.LoadLibrary("libcrypt.so"))
print(find_library("crypt"))

try:
dllist
except NameError:
print('dllist() not available')
else:
print(dllist())

if __name__ == "__main__":
test()
"""
This function is a no-op and is soft-deprecated since Python 3.16.
Do not use.
"""
2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2026-09-18-17-33-31.gh-issue-157763.Wd0_Uo.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
The undocumented :func:`!ctypes.util.test` function is now :term:`soft
deprecated` and a no-op at runtime.
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