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توضیحات

PEP 417's dictproxy (immutable dicts) for everyone

ویژگی	مقدار
سیستم عامل	-
نام فایل	dictproxyhack-1.1
نام	dictproxyhack
نسخه کتابخانه	1.1
نگهدارنده	[]
ایمیل نگهدارنده	[]
نویسنده	Eevee (Alex Munroe)
ایمیل نویسنده	eevee.pypi@veekun.com
آدرس صفحه اصلی	https://github.com/eevee/dictproxyhack
آدرس اینترنتی	https://pypi.org/project/dictproxyhack/
مجوز	UNKNOWN

dictproxyhack ============= Exposes the immutable ``dictproxy`` type to all (?) versions of Python. PEP416_ asked for a ``frozendict`` type, but was rejected. The alternative was to publicly expose ``dictproxy``, the type used for and immutable object's ``__dict__``, which wraps an existing dict and provides a read-only interface to it. The type has existed since 2.2, but it's never had a Python-land constructor. Until now. But only in 3.3+. Which is not all that helpful to some of us. This module clumsily exposes the same type to previous versions of Python. .. _PEP416: http://www.python.org/dev/peps/pep-0416/ Usage ----- :: from dictproxyhack import dictproxy myproxy = dictproxy(dict(foo="bar")) print(myproxy['foo']) myproxy['baz'] = "quux" # TypeError Since the proxy holds a reference to the underlying ``dict`` (but doesn't provide any way to get it back), you can trivially implement ``frozendict``:: def frozendict(*args, **kwargs): return dictproxy(dict(*args, **kwargs)) Might as well just inline that where you need it, really. Dependencies ------------ Python. Should work anywhere. Maybe. On **Python 3.3+**, you get the real ``mappingproxy`` type, which lives in the ``types`` module as ``MappingProxyType``. On **CPython 2.5+**, you get a fake class that forcibly instantiates ``dictproxy`` objects via ``ctypes`` shenanigans. On **nearly anything else**, you get a regular class that wraps a dict and doesn't implement any mutating parts of the mapping interface. Not a fabulous solution, but good enough, and only applies until your favorite port catches up with 3.3's standard library. On **non-C Python ports that predate 2.6**, you get pretty much a ``dict``, because the ``Mapping`` ABC doesn't even exist. Sorry. The shim classes also fool ``isinstance`` and ``issubclass``, so your dirty typechecking should work equally poorly anywhere. I've only actually tried this library on CPython 2.6, 2.7, 3.2, 3.3, and PyPy 2.1, but I'm interested in hearing whether it works elsewhere. Gotchas ------- Don't subclass ``dictproxy``. Python 3.3+ won't let you, and the shims for other versions are of extremely dubious use. ``dictproxy`` has been renamed to ``mappingproxy`` in 3.3+, so don't rely on ``repr`` to match across versions or anything. (It seemed apropos to use the older name for this module.)

نحوه نصب

نصب پکیج whl dictproxyhack-1.1:

pip install dictproxyhack-1.1.whl

نصب پکیج tar.gz dictproxyhack-1.1:

pip install dictproxyhack-1.1.tar.gz