샘플
packaging 26.3: Check whether a version satisfies a requirement specifier in Python
검증된 샘플 — pypi packaging 26.3: Check whether a version satisfies a requirement specifier in Python. python 3.12 · linux alpine/x64 · docker에서 contract를 실행해…
sha256:45e2533fcb7653dca8198455b39aca51f65c0122bfe3026b03034516f955f76e
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통과한 계약 영수증을 낸 서로 다른 서명 키의 수입니다. 하나면 작성자 혼자이고, 둘 이상이면 다른 사람도 빌드했다는 뜻입니다. 키는 스스로 만드는 것이고 뒤에 등록된 신원이 없으므로, 세는 것은 사람이 아니라 키입니다.
MIT-0
실행 증거
선언된 환경과 서명된 실행을 분리해 두었습니다. 이 샘플이 무엇을 어디서 실행했는지 그대로 볼 수 있습니다.
- 증거 기준
- 서명된 컨트랙트 통과
- 검증 영수증
- 2
- 빌드한 서명 키
- 2
선언된 환경
python 3.12 linux x64 python 3.12 python pip
검증 실행 환경
| 환경 | 컨트랙트 | 단계 | 실행일 |
|---|---|---|---|
| python 3.12 · linux alpine/x64 · docker ed25519:a2ec939a4c60e243 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-13 |
| python 3.12 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · python@1 |
2026-08-17 |
케이스
HOW- 목표
- Check whether a version satisfies a requirement specifier in Python
- 패키지
- 심벌
-
- SpecifierSet.contains
- Version
- 환경
- python 3.12
- 생성일
- 2026-08-13T15:47:01Z
컨트랙트
- parse versions and specifier sets with packaging
- assert a version inside the range matches
- assert a prerelease is excluded from a plain range
- assert prereleases=True includes it
파일
- csx.json
- requirements.txt
- src/__init__.py
- src/compat.py
- test/contract.py
소스
{"case":{"caseId":"case:sha256:7c9b0bfbe30dfbb7827c225b0241f69fd7fbe8d0cdc3b80010a46257ffbd8348","constraints":{"runtime":"python"},"contract":["parse versions and specifier sets with packaging","assert a version inside the range matches","assert a prerelease is excluded from a plain range","assert prereleases=True includes it"],"goal":"Check whether a version satisfies a requirement specifier in Python","kind":"HOW","packages":["pkg:pypi/packaging@26.3"],"schemaVersion":1,"symbols":["SpecifierSet.contains","Version"]},"contractCommand":["python","test/contract.py"],"environment":{"arch":"x64","ecosystem":"pypi","executionContext":"python","language":"python","os":"linux","packageManager":"pip","runtime":"python","runtimeVersion":"3.12","schemaVersion":1},"license":"MIT-0","packages":["pkg:pypi/packaging@26.3"],"schemaVersion":1,"symbols":["SpecifierSet.contains","Version"],"verifierAdapter":"python@1"}
packaging==26.3
"""Version range checks with packaging, the library pip itself uses."""
from packaging.specifiers import SpecifierSet
from packaging.version import Version
def fits(version, spec, allow_prerelease=False):
"""Report whether version satisfies spec.
Prereleases are excluded from an ordinary specifier even when they fall
numerically inside it — the single most surprising rule here, and the
reason "1.13.0rc1" fails a ">=1.0,<2.0" check that "1.13.0" passes.
Comparing version strings directly instead would order 1.9 above 1.10.
"""
return SpecifierSet(spec, prereleases=allow_prerelease).contains(Version(version))
def newest(versions):
"""Return the highest version, ordered by PEP 440 rather than by string."""
return str(max((Version(v) for v in versions)))
import os
import sys
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from src.compat import fits, newest
assert fits("1.12.0", ">=1.0,<2.0")
assert not fits("2.0.0", ">=1.0,<2.0")
# The prerelease rule: excluded by default, included on request.
assert not fits("1.13.0rc1", ">=1.0,<2.0")
assert fits("1.13.0rc1", ">=1.0,<2.0", allow_prerelease=True)
# PEP 440 ordering, not lexicographic: 1.10 is newer than 1.9.
assert newest(["1.9.0", "1.10.0", "1.2.0"]) == "1.10.0"
assert newest(["2.0.0rc1", "2.0.0"]) == "2.0.0"
print("CONTRACT PASS: packaging applied PEP 440 ranges and ordering")