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158 lines
4.6 KiB
Text
158 lines
4.6 KiB
Text
Metadata-Version: 2.1
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Name: shortuuid
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Version: 1.0.1
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Summary: A generator library for concise, unambiguous and URL-safe UUIDs.
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Home-page: https://github.com/stochastic-technologies/shortuuid/
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Author: Stochastic Technologies
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Author-email: info@stochastictechnologies.com
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License: BSD
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Platform: UNKNOWN
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Classifier: License :: OSI Approved :: BSD License
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Classifier: Programming Language :: Python
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Classifier: Programming Language :: Python :: 3.5
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Classifier: Programming Language :: Python :: 3.6
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Classifier: Programming Language :: Python :: 3.7
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Classifier: Topic :: Software Development :: Libraries :: Python Modules
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Requires-Python: >=3.5
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===========
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Description
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===========
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``shortuuid`` is a simple python library that generates concise, unambiguous,
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URL-safe UUIDs.
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Often, one needs to use non-sequential IDs in places where users will see them,
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but the IDs must be as concise and easy to use as possible. ``shortuuid`` solves
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this problem by generating uuids using Python's built-in ``uuid`` module and then
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translating them to base57 using lowercase and uppercase letters and digits, and
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removing similar-looking characters such as l, 1, I, O and 0.
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.. image:: https://travis-ci.org/skorokithakis/shortuuid.svg?branch=master
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:target: https://travis-ci.org/skorokithakis/shortuuid
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Installation
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------------
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To install ``shortuuid`` you need:
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* Python 2.5 or later in the 2.x line (earlier than 2.6 not tested), or any 3.x.
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If you have the dependencies, you have multiple options of installation:
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* With pip (preferred), do ``pip install shortuuid``.
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* With setuptools, do ``easy_install shortuuid``.
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* To install the source, download it from
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https://github.com/stochastic-technologies/shortuuid and do
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``python setup.py install``.
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Usage
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-----
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To use ``shortuuid``, just import it in your project like so:
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>>> import shortuuid
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You can then generate a short UUID:
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>>> shortuuid.uuid()
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'vytxeTZskVKR7C7WgdSP3d'
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If you prefer a version 5 UUID, you can pass a name (DNS or URL) to the call and
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it will be used as a namespace (uuid.NAMESPACE_DNS or uuid.NAMESPACE_URL) for the
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resulting UUID:
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>>> shortuuid.uuid(name="example.com")
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'wpsWLdLt9nscn2jbTD3uxe'
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>>> shortuuid.uuid(name="http://example.com")
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'c8sh5y9hdSMS6zVnrvf53T'
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You can also generate a cryptographically secure random string (using
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`os.urandom()`, internally) with:
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>>> shortuuid.ShortUUID().random(length=22)
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'RaF56o2r58hTKT7AYS9doj'
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To see the alphabet that is being used to generate new UUIDs:
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>>> shortuuid.get_alphabet()
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'23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
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If you want to use your own alphabet to generate UUIDs, use ``set_alphabet()``:
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>>> shortuuid.set_alphabet("aaaaabcdefgh1230123")
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>>> shortuuid.uuid()
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'0agee20aa1hehebcagddhedddc0d2chhab3b'
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``shortuuid`` will automatically sort and remove duplicates from your alphabet to
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ensure consistency:
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>>> shortuuid.get_alphabet()
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'0123abcdefgh'
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If the default 22 digits are too long for you, you can get shorter IDs by just
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truncating the string to the desired length. The IDs won't be universally unique
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any longer, but the probability of a collision will still be very low.
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To serialize existing UUIDs, use ``encode()`` and ``decode()``:
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>>> import uuid ; u = uuid.uuid4() ; u
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UUID('6ca4f0f8-2508-4bac-b8f1-5d1e3da2247a')
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>>> s = shortuuid.encode(u) ; s
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'cu8Eo9RyrUsV4MXEiDZpLM'
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>>> shortuuid.decode(s) == u
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True
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>>> short = s[:7] ; short
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'cu8Eo9R'
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>>> h = shortuuid.decode(short)
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UUID('00000000-0000-0000-0000-00b8c0b9f952')
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>>> shortuuid.decode(shortuuid.encode(h)) == h
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True
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Class-based usage
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-----------------
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If you need to have various alphabets per-thread, you can use the `ShortUUID` class, like so:
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>>> su = shortuuid.ShortUUID(alphabet="01345678")
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>>> su.uuid()
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'034636353306816784480643806546503818874456'
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>>> su.get_alphabet()
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'01345678'
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>>> su.set_alphabet("21345687654123456")
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>>> su.get_alphabet()
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'12345678'
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Command-line usage
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------------------
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`shortuuid` provides a simple way to generate a short UUID in a terminal::
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$ python3 -m shortuuid
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fZpeF6gcskHbSpTgpQCkcJ
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(Replace `python3` with `py` if you are using Windows)
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Compatibility note
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------------------
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Versions of ShortUUID prior to 1.0.0 generated UUIDs with their MSB last, i.e.
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reversed. This was later fixed, but if you have some UUIDs stored as a string
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with the old method, you need to pass `legacy=True` to `decode()` when
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converting your strings back to UUIDs.
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That option will go away in the future, so you will want to convert your UUIDs
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to strings using the new method. This can be done like so:
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>>> new_uuid_str = encode(decode(old_uuid_str, legacy=True))
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License
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-------
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``shortuuid`` is distributed under the BSD license.
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