Skip to main content

Generates a persistent sequence

Project description

This project is a fork of gocept.sequence (http://pypi.python.org/pypi/gocept.sequence/) originally created by Daniel Havlik and Sebastian Wehrmann.

cykooz.sequence

Generates a persistent sequence.

Sequences

>>> import persistent
>>> import zope.annotation.interfaces
>>> from zope.interface import implements

We need a testobject, where the SequenceGenerator stores his data:

>>> class Dummy(persistent.Persistent):
...     implements(zope.annotation.interfaces.IAttributeAnnotatable)
>>> test_object = zope.annotation.interfaces.IAnnotations(Dummy())

You get a SequenceGenerator by adapting to ISequenceGenerator:

>>> from cykooz.sequence.interfaces import ISequenceGenerator
>>> seq_gen = ISequenceGenerator(test_object)

You get a sequence like this:

>>> seq_gen.getNextValue()
1
>>> seq_gen.getNextValue()
2
>>> seq_gen.getNextValue()
3

You can also set the generator to a value:

>>> seq_gen.setNextValue(1)
>>> seq_gen.getNextValue()
1
>>> seq_gen.setNextValue(5)
>>> seq_gen.getNextValue()
5
>>> seq_gen.getNextValue()
6
>>> seq_gen.getNextValue()
7
>>> seq_gen.getNextValue()
8

But setNextValue only accepts integer arguments:

>>> seq_gen.setNextValue('1')
Traceback (most recent call last):
...
ValueError: setNextValue expected Integer, <type 'str'> found.
>>> seq_gen.setNextValue(3.14)
Traceback (most recent call last):
...
ValueError: setNextValue expected Integer, <type 'float'> found.

Changes

1.0.1 (2011-05-16)

  • Fix interface name for getting annotations.

1.0.0 (2011-04-14)

  • Removed old migration code.

  • Removed the dependency from Persistence.

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

cykooz.sequence-1.0.1.tar.gz (3.9 kB view hashes)

Uploaded Source

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page