Skip to main content
This is a pre-production deployment of Warehouse. Changes made here affect the production instance of PyPI (pypi.python.org).
Help us improve Python packaging - Donate today!

Multiple dispatch

Project Description

A relatively sane approach to multiple dispatch in Python.

This implementation of multiple dispatch is efficient, mostly complete, performs static analysis to avoid conflicts, and provides optional namespace support. It looks good too.

See the documentation at http://multiple-dispatch.readthedocs.org/

Example

>>> from multipledispatch import dispatch

>>> @dispatch(int, int)
... def add(x, y):
...     return x + y

>>> @dispatch(object, object)
... def add(x, y):
...     return "%s + %s" % (x, y)

>>> add(1, 2)
3

>>> add(1, 'hello')
'1 + hello'

What this does

  • Dispatches on all non-keyword arguments
  • Supports inheritance
  • Supports instance methods
  • Supports union types, e.g. (int, float)
  • Supports builtin abstract classes, e.g. Iterator, Number, ...
  • Caches for fast repeated lookup
  • Identifies possible ambiguities at function definition time
  • Provides hints to resolve ambiguities when they occur
  • Supports namespaces with optional keyword arguments

What this doesn’t do

  • Vararg dispatch
@dispatch([int])
def add(*args):
    ...
  • Diagonal dispatch
a = arbitrary_type()
@dispatch(a, a)
def are_same_type(x, y):
    return True

Installation and Dependencies

multipledispatch is on the Python Package Index (PyPI):

pip install multipledispatch

or

easy_install multipledispatch

multipledispatch supports Python 2.6+ and Python 3.2+ with a common codebase. It is pure Python and requires no dependencies beyond the standard library.

It is, in short, a light weight dependency.

License

New BSD. See License.

Release History

Release History

History Node

0.4.9

History Node

0.4.8

History Node

0.4.7

History Node

0.4.6

History Node

0.4.5

This version
History Node

0.4.4

History Node

0.4.3

History Node

0.4.2

History Node

0.4.1

History Node

0.4.0

History Node

0.3.0

History Node

0.2.0

History Node

0.1.0

Download Files

Download Files

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

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
multipledispatch-0.4.4.tar.gz (6.9 kB) Copy SHA256 Checksum SHA256 Source Jul 2, 2014

Supported By

WebFaction WebFaction Technical Writing Elastic Elastic Search Pingdom Pingdom Monitoring Dyn Dyn DNS Sentry Sentry Error Logging CloudAMQP CloudAMQP RabbitMQ Heroku Heroku PaaS Kabu Creative Kabu Creative UX & Design Fastly Fastly CDN DigiCert DigiCert EV Certificate Rackspace Rackspace Cloud Servers DreamHost DreamHost Log Hosting