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Interface module that verifies both providers and callers

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Jute is an interface module for Python 3 that verifies both providers and receivers of the interface.

Although duck typing is generally considered the Pythonic way of dealing with object compatibility, it assumes that syntactic compatibility implies semantic compatibility. Interfaces provide an explicit way to express semantic compatibility.

Most existing interface modules for Python (e.g. abc and zope.interface) check that implementing classes provide all the attributes specified in the interface. But they ignore the other side of the contract, failing to ensure that the receiver of the interface only calls operations specified by the interface.

The jute module allows verification of both providers of the interface and receivers of the interface, to ensure that code works with any provider of the interface, not just the provider with which it was tested.

Documentation is available at http://jute.readthedocs.org/

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