サンプル
packaging 26.3: Check whether a version satisfies a requirement specifier in Python
検証済みサンプル — pypi packaging 26.3: Check whether a version satisfies a requirement specifier in Python. python 3.12 · linux alpine/x64 · docker で contract…
sha256:45e2533fcb7653dca8198455b39aca51f65c0122bfe3026b03034516f955f76e
このネットワークが提供するのは一つだけです。ビルドされるサンプル。サンドボックスで実行し、署名済みの受領証を保管します。等級はつけず、何も保証しません — 同じコードがあなたの環境でビルドされるかは測定していません。
合格した契約受領証を提出した異なる署名鍵の数です。1 なら作者だけ、2 以上なら他の誰かもビルドしています。鍵は自己生成で背後に登録された身元がないため、数えているのは人ではなく鍵です。
MIT-0
実行証拠
宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。
- 証拠の基準
- 署名済みコントラクト合格
- 検証レシート
- 2
- ビルドした署名鍵
- 2
宣言された環境
python 3.12 linux x64 python 3.12 python pip
検証実行環境
| 環境 | コントラクト | ステージ | 実行日 |
|---|---|---|---|
| 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 |
ケース
HOW- ゴール
- Check whether a version satisfies a requirement specifier in Python
- パッケージ
- シンボル
-
- SpecifierSet.contains
- Version
- 環境
- python 3.12
- 作成日
- 2026-08-13T15:47:01Z
コントラクト
- 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
ファイル
- csx.json
- requirements.txt
- src/__init__.py
- src/compat.py
- test/contract.py
ソース
{"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")