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        "author": "Erik-Cristian Seulean",
        "author_email": "eseulean@bloomberg.net",
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            "Development Status :: 3 - Alpha",
            "Intended Audience :: Developers",
            "License :: OSI Approved :: Apache Software License",
            "Operating System :: MacOS :: MacOS X",
            "Operating System :: Microsoft :: Windows",
            "Operating System :: POSIX",
            "Programming Language :: Python :: 2",
            "Programming Language :: Python :: 2.7",
            "Programming Language :: Python :: 3",
            "Programming Language :: Python :: 3.6",
            "Programming Language :: Python :: 3.7",
            "Programming Language :: Python :: Implementation :: CPython",
            "Programming Language :: Python :: Implementation :: PyPy",
            "Topic :: Software Development :: Libraries",
            "Topic :: Software Development :: Testing",
            "Topic :: Utilities"
        ],
        "description": "\n[![Latest version on\nPyPi](https://badge.fury.io/py/attrs-strict.svg)](https://badge.fury.io/py/attrs-strict)\n[![Supported Python\nversions](https://img.shields.io/pypi/pyversions/attrs-strict.svg)](https://pypi.org/project/attrs-strict/)\n[![Travis build\nstatus](https://travis-ci.com/bloomberg/attrs-strict.svg?branch=master)](https://travis-ci.com/bloomberg/attrs-strict.svg?branch=master)\n[![Code style:\nblack](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)\n# attrs runtime validation\n\n`attrs-strict` is a Python package that contains runtime validation for [`attrs`]((https://github.com/python-attrs/attrs)) data classes based on the types existing in the typing module.\n\n\n## Rationale\nThe purpose of the library is to provide runtime validation for attributes specified in\n[`attrs`](https://www.attrs.org/en/stable/) data classes. The types supported are all the builtin\ntypes and most of the ones defined in the typing library. For Python 2, the typing module is\navailable through the backport found [`here`](https://pypi.org/project/typing/).\n\n## Quick Start\nType enforcement is based on the `type` attribute set on any field specified in an `attrs` dataclass. If the type argument is not specified no validation takes place.\n\n`pip install attrs-strict`\n\n```python\nfrom typing import List\n\nimport attr\n\nfrom attrs_strict import type_validator\n\n>>> @attr.s\n... class SomeClass(object):\n...     list_of_numbers = attr.ib(\n...         validator=type_validator(),\n...         type=List[int]\n...     )\n...\n\n>>> sc = SomeClass([1,2,3,4])\n>>> sc\nSomeClass(list_of_numbers=[1, 2, 3, 4])\n\n>>> try:\n...    other = SomeClass([1,2,3,'four'])\n... except ValueError as error:\n...    print(repr(error))\nattrs_strict._error.AttributeTypeError: list_of_numbers must be\ntyping.List[int] (got four that is a <class 'str'>) in [1, 2, 3, 'four']\n```\n\nNested type exceptions are validated acordingly, and a backtrace to the initial container is maintained to ease with debugging. This means that if an exception occurs because a nested element doesn't have the correct type, the representation of the exception will contain the path to the specific element that caused the exception.\n\n\n```python\nfrom typing import List, Tuple\n\nimport attr\n\nfrom attrs_strict import type_validator\n\n>>> @attr.s\n... class SomeClass(object):\n...     names = attr.ib(\n...        validator=type_validator(), type=List[Tuple[str, str]]\n...     )\n\n>>> sc = SomeClass(names=[('Moo', 'Moo'), ('Zoo',123)])\n\nattrs_strict._error.AttributeTypeError: names must be\n    typing.List[typing.Tuple[str, str]] (got 123 that is a <class 'int'>) in\n    ('Zoo', 123) in [('Moo', 'Moo'), ('Zoo', 123)]\n```\n\n### What is currently supported ?\n\nCurrently there's support for simple types and types specified in the `typing` module: `List`, `Dict`, `DefaultDict`, `Set`, `Union`, `Tuple` and any combination of them. This means that you can specify nested types like `List[List[Dict[int, str]]]` and the validation would check if attribute has the specific type.\n\n`Callables`, `TypeVars` or `Generics` are not supported yet but there are plans to support this in the future.\n\n## Building\n\nFor development, the project uses `tox` in order to install dependencies, run tests and generate documentation. In order to be able to do this, you need tox `pip install tox` and after that invoke `tox` in the root of the project.\n\n## Installation\n\nRun `pip install attrs-strict` to install the latest stable version from [PyPi](https://pypi.org/project/attrs-strict/). Documentation is hosted on [readthedocs](https://attrs-strict.readthedocs.io/en/latest/).\n\nFor the latest version, on github `pip install git+https://github.com/bloomberg/attrs-strict`.\n\n\n\n",
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