particionado
This commit is contained in:
Omar Sánchez Pizarro
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pip
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Copyright (c) 2005-2020, Ilya Etingof <etingof@gmail.com>
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All rights reserved.
|
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|
||||
Redistribution and use in source and binary forms, with or without
|
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modification, are permitted provided that the following conditions are met:
|
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|
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* Redistributions of source code must retain the above copyright notice,
|
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this list of conditions and the following disclaimer.
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|
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* Redistributions in binary form must reproduce the above copyright notice,
|
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this list of conditions and the following disclaimer in the documentation
|
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and/or other materials provided with the distribution.
|
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|
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
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POSSIBILITY OF SUCH DAMAGE.
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@@ -0,0 +1,230 @@
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Metadata-Version: 2.1
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Name: pyasn1
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Version: 0.5.0
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Summary: Pure-Python implementation of ASN.1 types and DER/BER/CER codecs (X.208)
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Home-page: https://github.com/pyasn1/pyasn1
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Author: Ilya Etingof
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Author-email: etingof@gmail.com
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Maintainer: pyasn1 maintenance organization
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Maintainer-email: Christian Heimes <christian@python.org>
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License: BSD-2-Clause
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Project-URL: Documentation, https://pyasn1.readthedocs.io
|
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Project-URL: Source, https://github.com/pyasn1/pyasn1
|
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Project-URL: Issues, https://github.com/pyasn1/pyasn1/issues
|
||||
Project-URL: Changelog, https://pyasn1.readthedocs.io/en/latest/changelog.html
|
||||
Platform: any
|
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Classifier: Development Status :: 5 - Production/Stable
|
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Classifier: Environment :: Console
|
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Classifier: Intended Audience :: Developers
|
||||
Classifier: Intended Audience :: Education
|
||||
Classifier: Intended Audience :: Information Technology
|
||||
Classifier: Intended Audience :: System Administrators
|
||||
Classifier: Intended Audience :: Telecommunications Industry
|
||||
Classifier: License :: OSI Approved :: BSD License
|
||||
Classifier: Natural Language :: English
|
||||
Classifier: Operating System :: OS Independent
|
||||
Classifier: Programming Language :: Python :: 2
|
||||
Classifier: Programming Language :: Python :: 2.7
|
||||
Classifier: Programming Language :: Python :: 3
|
||||
Classifier: Programming Language :: Python :: 3.6
|
||||
Classifier: Programming Language :: Python :: 3.7
|
||||
Classifier: Programming Language :: Python :: 3.8
|
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Classifier: Programming Language :: Python :: 3.9
|
||||
Classifier: Programming Language :: Python :: 3.10
|
||||
Classifier: Programming Language :: Python :: 3.11
|
||||
Classifier: Programming Language :: Python :: Implementation :: CPython
|
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Classifier: Programming Language :: Python :: Implementation :: PyPy
|
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Classifier: Topic :: Communications
|
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Classifier: Topic :: Software Development :: Libraries :: Python Modules
|
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Requires-Python: !=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,>=2.7
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Description-Content-Type: text/markdown
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License-File: LICENSE.rst
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ASN.1 library for Python
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------------------------
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[](https://pypi.org/project/pyasn1)
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[](https://pypi.org/project/pyasn1/)
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||||
[](https://github.com/pyasn1/pyasn1/actions/workflows/main.yml)
|
||||
[](https://codecov.io/github/pyasn1/pyasn1)
|
||||
[](https://raw.githubusercontent.com/pyasn1/pyasn1/master/LICENSE.txt)
|
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|
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This is a free and open source implementation of ASN.1 types and codecs
|
||||
as a Python package. It has been first written to support particular
|
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protocol (SNMP) but then generalized to be suitable for a wide range
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of protocols based on
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[ASN.1 specification](https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-X.208-198811-W!!PDF-E&type=items).
|
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|
||||
**NOTE:** The package is now maintained by *Christian Heimes* and
|
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*Simon Pichugin* in project https://github.com/pyasn1/pyasn1.
|
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|
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Features
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||||
--------
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* Generic implementation of ASN.1 types (X.208)
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* Standards compliant BER/CER/DER codecs
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* Can operate on streams of serialized data
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* Dumps/loads ASN.1 structures from Python types
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* 100% Python, works with Python 2.7 and 3.6+
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* MT-safe
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* Contributed ASN.1 compiler [Asn1ate](https://github.com/kimgr/asn1ate)
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|
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Why using pyasn1
|
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----------------
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ASN.1 solves the data serialisation problem. This solution was
|
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designed long ago by the wise Ancients. Back then, they did not
|
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have the luxury of wasting bits. That is why ASN.1 is designed
|
||||
to serialise data structures of unbounded complexity into
|
||||
something compact and efficient when it comes to processing
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the data.
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|
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That probably explains why many network protocols and file formats
|
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still rely on the 30+ years old technology. Including a number of
|
||||
high-profile Internet protocols and file formats.
|
||||
|
||||
Quite a number of books cover the topic of ASN.1.
|
||||
[Communication between heterogeneous systems](http://www.oss.com/asn1/dubuisson.html)
|
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by Olivier Dubuisson is one of those high quality books freely
|
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available on the Internet.
|
||||
|
||||
The pyasn1 package is designed to help Python programmers tackling
|
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network protocols and file formats at the comfort of their Python
|
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prompt. The tool struggles to capture all aspects of a rather
|
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complicated ASN.1 system and to represent it on the Python terms.
|
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|
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How to use pyasn1
|
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-----------------
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With pyasn1 you can build Python objects from ASN.1 data structures.
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For example, the following ASN.1 data structure:
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|
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```bash
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Record ::= SEQUENCE {
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id INTEGER,
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room [0] INTEGER OPTIONAL,
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house [1] INTEGER DEFAULT 0
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}
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```
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Could be expressed in pyasn1 like this:
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```python
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class Record(Sequence):
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componentType = NamedTypes(
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NamedType('id', Integer()),
|
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OptionalNamedType(
|
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'room', Integer().subtype(
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implicitTag=Tag(tagClassContext, tagFormatSimple, 0)
|
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)
|
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),
|
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DefaultedNamedType(
|
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'house', Integer(0).subtype(
|
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implicitTag=Tag(tagClassContext, tagFormatSimple, 1)
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)
|
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)
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)
|
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```
|
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|
||||
It is in the spirit of ASN.1 to take abstract data description
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and turn it into a programming language specific form.
|
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Once you have your ASN.1 data structure expressed in Python, you
|
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can use it along the lines of similar Python type (e.g. ASN.1
|
||||
`SET` is similar to Python `dict`, `SET OF` to `list`):
|
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|
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```python
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>>> record = Record()
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>>> record['id'] = 123
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>>> record['room'] = 321
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>>> str(record)
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Record:
|
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id=123
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room=321
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>>>
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```
|
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|
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Part of the power of ASN.1 comes from its serialisation features. You
|
||||
can serialise your data structure and send it over the network.
|
||||
|
||||
```python
|
||||
>>> from pyasn1.codec.der.encoder import encode
|
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>>> substrate = encode(record)
|
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>>> hexdump(substrate)
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00000: 30 07 02 01 7B 80 02 01 41
|
||||
```
|
||||
|
||||
Conversely, you can turn serialised ASN.1 content, as received from
|
||||
network or read from a file, into a Python object which you can
|
||||
introspect, modify, encode and send back.
|
||||
|
||||
```python
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>>> from pyasn1.codec.der.decoder import decode
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>>> received_record, rest_of_substrate = decode(substrate, asn1Spec=Record())
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>>>
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>>> for field in received_record:
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>>> print('{} is {}'.format(field, received_record[field]))
|
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id is 123
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room is 321
|
||||
house is 0
|
||||
>>>
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>>> record == received_record
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||||
True
|
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>>> received_record.update(room=123)
|
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>>> substrate = encode(received_record)
|
||||
>>> hexdump(substrate)
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00000: 30 06 02 01 7B 80 01 7B
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||||
```
|
||||
|
||||
The pyasn1 classes struggle to emulate their Python prototypes (e.g. int,
|
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list, dict etc.). But ASN.1 types exhibit more complicated behaviour.
|
||||
To make life easier for a Pythonista, they can turn their pyasn1
|
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classes into Python built-ins:
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|
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```python
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>>> from pyasn1.codec.native.encoder import encode
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>>> encode(record)
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{'id': 123, 'room': 321, 'house': 0}
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||||
```
|
||||
|
||||
Or vice-versa -- you can initialize an ASN.1 structure from a tree of
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Python objects:
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||||
|
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```python
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>>> from pyasn1.codec.native.decoder import decode
|
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>>> record = decode({'id': 123, 'room': 321, 'house': 0}, asn1Spec=Record())
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>>> str(record)
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Record:
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id=123
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room=321
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>>>
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||||
```
|
||||
|
||||
With ASN.1 design, serialisation codecs are decoupled from data objects,
|
||||
so you could turn every single ASN.1 object into many different
|
||||
serialised forms. As of this moment, pyasn1 supports BER, DER, CER and
|
||||
Python built-ins codecs. The extremely compact PER encoding is expected
|
||||
to be introduced in the upcoming pyasn1 release.
|
||||
|
||||
More information on pyasn1 APIs can be found in the
|
||||
[documentation](https://pyasn1.readthedocs.io/en/latest/pyasn1/contents.html),
|
||||
compiled ASN.1 modules for different protocols and file formats
|
||||
could be found in the pyasn1-modules
|
||||
[repo](https://github.com/pyasn1/pyasn1-modules).
|
||||
|
||||
How to get pyasn1
|
||||
-----------------
|
||||
|
||||
The pyasn1 package is distributed under terms and conditions of 2-clause
|
||||
BSD [license](https://pyasn1.readthedocs.io/en/latest/license.html). Source code is freely
|
||||
available as a GitHub [repo](https://github.com/pyasn1/pyasn1).
|
||||
|
||||
You could `pip install pyasn1` or download it from [PyPI](https://pypi.org/project/pyasn1).
|
||||
|
||||
If something does not work as expected,
|
||||
[open an issue](https://github.com/epyasn1/pyasn1/issues) at GitHub or
|
||||
post your question [on Stack Overflow](https://stackoverflow.com/questions/ask)
|
||||
or try browsing pyasn1
|
||||
[mailing list archives](https://sourceforge.net/p/pyasn1/mailman/pyasn1-users/).
|
||||
|
||||
Copyright (c) 2005-2020, [Ilya Etingof](mailto:etingof@gmail.com).
|
||||
All rights reserved.
|
||||
@@ -0,0 +1,73 @@
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@@ -0,0 +1,6 @@
|
||||
Wheel-Version: 1.0
|
||||
Generator: bdist_wheel (0.40.0)
|
||||
Root-Is-Purelib: true
|
||||
Tag: py2-none-any
|
||||
Tag: py3-none-any
|
||||
|
||||
@@ -0,0 +1 @@
|
||||
pyasn1
|
||||
@@ -0,0 +1 @@
|
||||
|
||||
Reference in New Issue
Block a user