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        "author": "Henrik Andersson",
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        "description": "> Function argument validation for humans for Python 3!\n\n\n## Highlights\n\n- Straight port from the amazing library [`ow`](https://github.com/sindresorhus/ow/) from Sindre Sorhus\n- Expressive chainable API\n- Pythonic approach via decorator\n- Lots of built-in validations\n- Supports custom validations\n- Written in Python3 with Type hinting\n\n\n## Notes\nSince this is a straight up port from the JavaScript library not all features are available.\nPartly since this is a port and I haven't caught up and also since Python doesn't support all usecases\nas JavaScript does.\n\n## Install\n\n```shell\n$ pip3 install pyow\n```\n\n\n## Usage\n\n```python\nfrom pyow import pyow\n\ndef unicorn(input):\n\tpyow(input, pyow.string.min_length(5))\n\n\t# ...\n\nunicorn(3)\n>>> ArgumentError: 'Expected argument to be of type `str` but received type `int`\n\nunicorn('yo')\n>>> ArgumentError: Expected string to have a minimum length of `3`, got `yo`\n```\n\nor via decorator\n\n```python\n\nfrom pyow.decorator import validate\n\n@validate(\n    pyow.string.min_length(5)\n)\ndef unicorn(input):\n    return 1\n```\n\n## API\n\n### pyow(value, predicate)\n\nTest if `value` matches the provided `predicate`. Throws an `ArgumentError` if the test fails.\n\n### pyow.is_valid(value, predicate)\n\nReturns `True` if the value matches the predicate, otherwise returns `False`.\n\n### pyow.create(predicate)\n\nCreate a reusable validator.\n\n```python\ncheck_password = pyow.create(pyow.string.min_length(6))\n\ncheck_password('foo')\n>>> ArgumentError: ('Expected string to have a minimum length of `6`, got `foo`')\n```\n\n### pyow.any(predicate: List[Predicate])\n\nReturns a predicate that verifies if the value matches at least one of the given predicates.\n\n```python\npyow('foo', pyow.any(pyow.string.max_length(3), pyow.number))\n```\n\n### pyow.{type}\n\nAll the below types return a predicate. Every predicate has some extra operators that you can use to test the value even more fine-grained.\n\n#### Primitives\n\n- [`string`]()\n- [`number`]()\n- [`boolean`]()\n\n#### Built-in types\n\n- [`list`]()\n- [`set`]()\n- [`dict`]()\n- [`error`]()\n\n### Predicates\n\nThe following predicates are available on every type.\n\n#### nix/isnot\n\nInverts the following predicates.\n\n```python\npyow(1, pyow.number.nix.infinite)\npyow(1, pyow.number.isnot.infinite)\n\npyow('', pyow.string.isnot.empty);\n>>> ArgumentError: [NOT] Expected string to be empty, got ``\n```\n\n#### is_(fn)\n\nUse a custom validation function. Return `True` if the value matches the validation, return `False` if it doesn't.\n\n```python\npyow(1, pyow.number.is_(lambda x: x < 10))\n\npyow(1, pyow.number.is_(lambda x: x > 10))\n>>> ArgumentError: Expected `1` to pass custom validation function\n```\n\nInstead of returning `False`, you can also return a custom error message which results in a failure.\n\n```python\ndef greater_than(max_number: int, x: int):\n\treturn x > max_number or f'Expected `{x}` to be greater than `{max_number}`'\n};\n\npyow(5, pyow.number.is_(lambda x: greater_than(10, x)))\n>>> ArgumentError: Expected `5` to be greater than `10`\n```\n\n\n## Maintainers\n\n- [Henrik Andersson](https://github.com/limelights)\n\n\n## Related\n\n- [@sindresorhus/ow](https://github.com/sindresorhus/ow) - Function argument validation for humans\n\n\n## License\n\nMIT\n\n\n",
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