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

Utility framework for easier & more robust duck typing in Python

Project Description

pyduck is a Python utility framework for more effective usage of language’s defining traits: duck typing. It enhances the language with several useful features that increase the readability and reliability of Python code.

from pyduck import Interface, expects, Any, overload

class Iterable(Interface):
    def __iter__(self): pass

def __iterable_as_json(value):
    json_list = map(as_json, value)
    return "[%s]" % str.join(",", json_list)

def __string_as_json(value):
    return '"%s"' % str(value)

def __other_as_json(value):
    return str(value)

as_json = overload(__iterable_as_json, __string_as_json, __other_as_json)


  • interfaces which do not need to be explicitly declared (similar to Go language)
  • automatic interface/type checking for function arguments
  • function overloading based on interfaces/types of arguments
  • automatic interface/type checking for function return values

For more info & the docs, see the project’s webpage.

Release History

Release History

This version
History Node


History Node


History Node


History Node


History Node


History Node


History Node


History Node


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
pyduck-0.5.2.tar.gz (8.5 kB) Copy SHA256 Checksum SHA256 Source Nov 16, 2011

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