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# This software is subject to the provisions of the Zope Public License,
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"""Interfaces

This package implements the Python "scarecrow" proposal.

The package exports two objects, `Interface` and `Attribute` directly. It also
exports several helper methods. Interface is used to create an interface with
a class statement, as in:

  class IMyInterface(Interface):
    '''Interface documentation
    '''

    def meth(arg1, arg2):
        '''Documentation for meth
        '''

    # Note that there is no self argument

To find out what you can do with interfaces, see the interface
interface, `IInterface` in the `interfaces` module.

The package has several public modules:

  o `declarations` provides utilities to declare interfaces on objects. It
    also provides a wide range of helpful utilities that aid in managing
    declared interfaces. Most of its public names are however imported here. 

  o `document` has a utility for documenting an interface as structured text.

  o `exceptions` has the interface-defined exceptions

  o `interfaces` contains a list of all public interfaces for this package.

  o `verify` has utilities for verifying implementations of interfaces.

See the module doc strings for more information.

$Id: __init__.py 29118 2005-02-11 17:44:16Z jim $
"""
__docformat__ = 'restructuredtext'

from zope.interface.interface import Interface, _wire

# Need to actually get the interface elements to implement the right interfaces
_wire()
del _wire

from zope.interface.interface import Attribute, invariant

from zope.interface.declarations import providedBy, implementedBy
from zope.interface.declarations import classImplements, classImplementsOnly
from zope.interface.declarations import directlyProvidedBy, directlyProvides
from zope.interface.declarations import alsoProvides, implementer
from zope.interface.declarations import implements, implementsOnly
from zope.interface.declarations import classProvides, moduleProvides
from zope.interface.declarations import Declaration
from zope.interface.exceptions import Invalid

# The following are to make spec pickles cleaner
from zope.interface.declarations import Provides


from zope.interface.interfaces import IInterfaceDeclaration

moduleProvides(IInterfaceDeclaration)

__all__ = ('Interface', 'Attribute') + tuple(IInterfaceDeclaration)
