This is a pre-production deployment of Warehouse, however changes made here WILL affect the production instance of PyPI.
Latest Version Dependencies status unknown Test status unknown Test coverage unknown
Project Description

Multimethod provides a decorator for adding multiple argument dispatching to functions. The decorator finds the multimethod of the same name, creating it if necessary, and registers the function with its annotations.

There are several multiple dispatch libraries on PyPI. This one aims to be correct, simple, and fast. It doesn’t support arbitrary predicates, for example, but should be the fastest pure Python implementation possible.

Usage

from multimethod import multimethod

@multimethod
def func(x: int, y: float):
   ...

func is now a multimethod which will delegate to the above function, when called with arguments of the specified types. Subsequent usage will register new types and functions to the existing multimethod of the same name. If an exact match can’t be found, the next closest method is called (and cached). Candidate methods are ranked based on their subclass relationships. If no matches are found, a custom TypeError is raised.

A strict flag can also be set on the multimethod object, in which case finding multiple matches also raises a TypeError. Keyword arguments can be used when calling, but won’t affect the dispatching.

Types can instead be specified by calling multimethod, thereby supporting Python 2 as well. This syntax also supports stacking decorators for registering multiple signatures.

@multimethod(int, float)
@multimethod(float, int)
def func(x, y):
   ...

The functools.singledispatch style syntax introduced in Python 3.4 is also supported. This requires creating a multimethod explicitly, and consequently doesn’t rely on the name matching.

from multimethod import multidispatch

@multidispatch
def func(*args):
   ...

@func.register(*types)
def _(*args):
   ...

See tests for more example usage.

Installation

$ pip install multimethod

Dependencies

  • Python 2.7, 3.3+

Tests

100% branch coverage.

$ pytest [--cov]

Changes

0.6

  • Multimethods can be defined inside a class

0.5

  • Optimized dispatching
  • Support for functools.singledispatch syntax

0.4

  • Dispatch on Python 3 annotations
Release History

Release History

0.6

This version

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

Donec et mollis dolor. Praesent et diam eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue enim, ut porta lorem lacinia consectetur. Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet, consectetur adipiscing elit.

Show More

0.5

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

Donec et mollis dolor. Praesent et diam eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue enim, ut porta lorem lacinia consectetur. Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet, consectetur adipiscing elit.

Show More

0.4

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

Donec et mollis dolor. Praesent et diam eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue enim, ut porta lorem lacinia consectetur. Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet, consectetur adipiscing elit.

Show More

Download Files

Download Files

TODO: Brief introduction on what you do with files - including link to relevant help section.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
multimethod-0.6-py2.py3-none-any.whl (5.9 kB) Copy SHA256 Checksum SHA256 2.7 Wheel Jan 2, 2017
multimethod-0.6.tar.gz (5.1 kB) Copy SHA256 Checksum SHA256 Source Jan 2, 2017

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