reacttrs

Name	reacttrs JSON
Version	0.2.1 JSON
	download
home_page	None
Summary	Attributes with superpowers
upload_time	2024-07-20 07:36:03
maintainer	None
docs_url	None
author	None
requires_python	>=3.8
license	None
keywords
VCS
bugtrack_url
requirements	No requirements were recorded.
Travis-CI	No Travis.
coveralls test coverage	No coveralls.

            # reacttrs

Reactive attributes, initially extracted out from [Textual](https://textual.textualize.io/guide/reactivity), now a fork of [Declare](https://github.com/willmcgugan/declare).

```py
from reacttrs import Int, Str


class Foo:

    name = Str("Paul")
    age = Int(34)
    birth = Int(1990)

    @name.watch
    def _watch_name(self, old: str, new: str):
        print(f"{old=}, {new=}")

    @age.validate
    def _validate_age(self, value: int) -> int:
        return 2024 - self.birth

foo = Foo()
foo.name = "John"  # old='Paul', new='John'
foo.name = "Steve"  # old='John', new='Steve'

print(foo.age)  # 34
foo.birth = 1991
foo.age = 34
print(foo.age)  # 33
```

            

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    "description": "# reacttrs\n\nReactive attributes, initially extracted out from [Textual](https://textual.textualize.io/guide/reactivity), now a fork of [Declare](https://github.com/willmcgugan/declare).\n\n```py\nfrom reacttrs import Int, Str\n\n\nclass Foo:\n\n    name = Str(\"Paul\")\n    age = Int(34)\n    birth = Int(1990)\n\n    @name.watch\n    def _watch_name(self, old: str, new: str):\n        print(f\"{old=}, {new=}\")\n\n    @age.validate\n    def _validate_age(self, value: int) -> int:\n        return 2024 - self.birth\n\nfoo = Foo()\nfoo.name = \"John\"  # old='Paul', new='John'\nfoo.name = \"Steve\"  # old='John', new='Steve'\n\nprint(foo.age)  # 34\nfoo.birth = 1991\nfoo.age = 34\nprint(foo.age)  # 33\n```\n",
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