bpylist2 4.1.0

Parse and generate NSKeyedArchiver archives

This is a fork of Marketcircle/bpylist. This one is hopefully more responsive to PRs.

Implementation of the Apple’s Binary Plist and the NSKeyedArchiver format

Usage

Binary Plists

For reading and writing plain PLists please use stdlib plistlib library.

KeyedArchives

NSKeyedArchiver is an Apple proprietary serialization format for Cocoa objects. bpylist2 supports reading and writing NSKeyedArchiver compatible archives. The API is similar to the binary plist API.

Unarchiving an object

from bpylist2 import archiver

with open('my_archived_object', 'rb') as f:
    archiver.unarchive(f.read())

Archiving an object

from bpylist2 import archiver

my_object = { 'foo':'bar', 'some_array': [1,2,3,4] }
archiver.archive(my_object)

Custom objects

If your archive includes classes that are not “standard” Cocoa classes (NSString, NSNumber, NSDate, NSNull, NSDictionary or NSArray), you register a Python class that the Cocoa class maps to and register it.

The simplest way to define a class is by providing a python dataclass, for example you define a class with all the fields of the archived object:

@dataclasses.dataclass
class MyClass(DataclassArchiver):
    int_field: int = 0
    str_field: str = ""
    float_field: float = -1.1
    list_field: list = dataclasses.field(default_factory=list)

Alternatively you can implement custom unarchiving code.

The Python class needs to implement the encode_archive and decode_archive methods.

## Define a Python Class

from bpylist2 import archiver

class MyClass:
    first_property = None
    second_property = None

    def __init__(self, first_property, second_property):
        self.first_property = first_property
        self.second_property = second_property

    def encode_archive(self, archive):
        archive.encode('first_property', self.first_property)
        archive.encode('second_property', self.second_property)

    def decode_archive(archive):
        first = archive.decode('first_property')
        second = archive.decode('second_property')
        return MyClass(first, second)

When the mapper class is defined, register it with unarchiver:

## Register the class for the Cocoa class 'MyCocoaClass'

archiver.update_class_map({ 'MyCocoaClass': FooArchive })

Implementation Note

This package requires the version of plistlib included in the Python 3.8 standard library. In order to support Python 3.6 and 3.7, a copy of the Python 3.8 plistlib is bundled with bpylist2 (Specifically, commit 9054967). This version will only be used if bpylist2 detects it is running on Python < 3.8.

How to publish a new version to PyPI

$ pip install twine wheel
$ python setup.py sdist bdist_wheel
$ twine upload dist/*

License

MIT License

Copyright (c) 2017 Marketcircle Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.