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The Python Library Reference 发布 2.7.18 Guido van Rossum and the Python development team 五月 20, 2020 Python Software Foundation Email: docs@python.org Contents 1 概述 3 2 内置函数 5 3 Non-essential Built-in ArgumentParser(prog='game.py') >>> parser.add_argument('move', choices=['rock', 'paper', 'scissors']) >>> parser.parse_args(['rock']) Namespace(move='rock') >>> parser.parse_args(['fire']) usage: game.py [-h] {rock {rock,paper,scissors} game.py: error: argument move: invalid choice: 'fire' (choose from 'rock', 'paper', 'scissors') 请注意 choices 容器包含的内容会在执行任意type 转换之后被检查，因此 choices 容器中对象的类型应当与指 定的type 相匹配: >>> parser

The Python Library Reference 发布 2.7.18 Guido van Rossum and the Python development team 五月 20, 2020 Python Software Foundation Email: docs@python.org Contents 1 概述 3 2 内置函数 5 3 Non-essential Built-in ArgumentParser(prog='game.py') >>> parser.add_argument('move', choices=['rock', 'paper', 'scissors']) >>> parser.parse_args(['rock']) Namespace(move='rock') >>> parser.parse_args(['fire']) usage: game.py [-h] {rock {rock,paper,scissors} game.py: error: argument move: invalid choice: 'fire' (choose from 'rock', 'paper', 'scissors') 请注意 choices 容器包含的内容会在执行任意type 转换之后被检查，因此 choices 容器中对象的类型应当与指 定的type 相匹配: >>> parser

The Python Library Reference 发布 2.7.18 Guido van Rossum and the Python development team 五月 20, 2020 Python Software Foundation Email: docs@python.org Contents 1 概述 3 2 内置函数 5 3 Non-essential Built-in ArgumentParser(prog='game.py') >>> parser.add_argument('move', choices=['rock', 'paper', 'scissors']) >>> parser.parse_args(['rock']) Namespace(move='rock') >>> parser.parse_args(['fire']) usage: game.py [-h] {rock {rock,paper,scissors} game.py: error: argument move: invalid choice: 'fire' (choose from 'rock', 'paper', 'scissors') 请注意 choices 容器包含的内容会在执行任意type 转换之后被检查，因此 choices 容器中对象的类型应当与指 定的type 相匹配: >>> parser

The Python Library Reference 发布 3.6.15 Guido van Rossum and the Python development team 九月 05, 2021 Python Software Foundation Email: docs@python.org Contents 1 概述 3 2 内置函数 5 3 内置常量 25 3.1 由 site Authority', 'author_email': 'pypa-dev@googlegroups.com', 'bugtrack_url': None, 'classifiers': ['Development Status :: 3 - Alpha', 'Intended Audience :: Developers', 'License :: OSI Approved :: MIT License' Library Reference, 发布 3.6.15 (续上页) 'Programming Language :: Python :: 3.4', 'Topic :: Software Development :: Build Tools'], 'description': 'A sample Python project\n' '=======================\n' '\n'

The Python Library Reference 发布 3.6.15 Guido van Rossum and the Python development team 九月 05, 2021 Python Software Foundation Email: docs@python.org Contents 1 概述 3 2 内置函数 5 3 内置常量 25 3.1 由 site Authority', 'author_email': 'pypa-dev@googlegroups.com', 'bugtrack_url': None, 'classifiers': ['Development Status :: 3 - Alpha', 'Intended Audience :: Developers', 'License :: OSI Approved :: MIT License' Library Reference, 发布 3.6.15 (续上页) 'Programming Language :: Python :: 3.4', 'Topic :: Software Development :: Build Tools'], 'description': 'A sample Python project\n' '=======================\n' '\n'

The Python Library Reference 发布 3.7.13 Guido van Rossum and the Python development team 三月 16, 2022 Python Software Foundation Email: docs@python.org Contents 1 概述 3 1.1 可用性注释 . . . . . . . . . Authority', 'author_email': 'pypa-dev@googlegroups.com', 'bugtrack_url': None, 'classifiers': ['Development Status :: 3 - Alpha', 'Intended Audience :: Developers', 'License :: OSI Approved :: MIT License' 'Programming Language :: Python :: 3.3', 'Programming Language :: Python :: 3.4', 'Topic :: Software Development :: Build Tools'], 'description': 'A sample Python project\n' '=======================\n' '\n'

The Python Library Reference 发布 3.7.13 Guido van Rossum and the Python development team 三月 16, 2022 Python Software Foundation Email: docs@python.org Contents 1 概述 3 1.1 可用性注释 . . . . . . . . . Authority', 'author_email': 'pypa-dev@googlegroups.com', 'bugtrack_url': None, 'classifiers': ['Development Status :: 3 - Alpha', 'Intended Audience :: Developers', 'License :: OSI Approved :: MIT License' 'Programming Language :: Python :: 3.3', 'Programming Language :: Python :: 3.4', 'Topic :: Software Development :: Build Tools'], 'description': 'A sample Python project\n' '=======================\n' '\n'

The Python Library Reference 发布 3.8.20 Guido van Rossum and the Python development team 九月 07, 2024 Python Software Foundation Email: docs@python.org Contents 1 概述 3 1.1 可用性注释 . . . . . . . . . Authority', 'author_email': 'pypa-dev@googlegroups.com', 'bugtrack_url': None, 'classifiers': ['Development Status :: 3 - Alpha', 'Intended Audience :: Developers', 'License :: OSI Approved :: MIT License' 'Programming Language :: Python :: 3.3', 'Programming Language :: Python :: 3.4', 'Topic :: Software Development :: Build Tools'], 'description': 'A sample Python project\n' '=======================\n' '\n'