Original implementation

CHANGES.txt

+Changelog
+=========
+
+2.13.2 (2010-06-16)
+-------------------
+
+- LP #587760: Handle tp_basicsize correctly.
+
+2.13.1 (2010-04-03)
+-------------------
+
+- Removed undeclared testing dependency on zope.testing.
+
+- Removed cruft in ``pickle/pickle.c`` related to removed ``__getnewargs__``.
+
+2.13.0 (2010-02-22)
+-------------------
+
+- Avoid defining ``__getnewargs__`` as not to defeat the ZODB persistent
+  reference optimization. Refs https://bugs.launchpad.net/zope2/+bug/143657.
+  In order to take advantage of this optimization, you need to re-save your
+  objects.
+
+2.12.0 (2010-02-14)
+-------------------
+
+- Removed old build artifacts and some metadata cleanup.
+
+- Added support for method cache in ExtensionClass. Patch contributed by
+  Yoshinori K. Okuji. See https://bugs.launchpad.net/zope2/+bug/486182.
+
+2.11.3 (2009-08-02)
+-------------------
+
+- Further 64-bit fixes (Python 2.4 compatibility).
+
+2.11.2 (2009-08-02)
+-------------------
+
+- Fixed 64-bit compatibility issues for Python 2.5.x / 2.6.x.  See 
+  http://www.python.org/dev/peps/pep-0353/ for details.
+
+2.11.1 (2009-02-19)
+-------------------
+
+- Initial egg release.

COPYRIGHT.txt

+Zope Foundation and Contributors
\ No newline at end of file

LICENSE.txt

+Zope Public License (ZPL) Version 2.1
+
+A copyright notice accompanies this license document that identifies the
+copyright holders.
+
+This license has been certified as open source. It has also been designated as
+GPL compatible by the Free Software Foundation (FSF).
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions in source code must retain the accompanying copyright
+notice, this list of conditions, and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the accompanying copyright
+notice, this list of conditions, and the following disclaimer in the
+documentation and/or other materials provided with the distribution.
+
+3. Names of the copyright holders must not be used to endorse or promote
+products derived from this software without prior written permission from the
+copyright holders.
+
+4. The right to distribute this software or to use it for any purpose does not
+give you the right to use Servicemarks (sm) or Trademarks (tm) of the
+copyright
+holders. Use of them is covered by separate agreement with the copyright
+holders.
+
+5. If any files are modified, you must cause the modified files to carry
+prominent notices stating that you changed the files and the date of any
+change.
+
+Disclaimer
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY EXPRESSED
+OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY DIRECT, INDIRECT,
+INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

PKG-INFO

+Metadata-Version: 1.0
+Name: ExtensionClass
+Version: 2.13.2
+Summary: Metaclass for subclassable extension types
+Home-page: http://pypi.python.org/pypi/ExtensionClass
+Author: Zope Foundation and Contributors
+Author-email: zope-dev@zope.org
+License: ZPL 2.1
+Description: ExtensionClass and ExtensionClass-related packages
+        ==================================================
+        
+        ExtensionClass
+        --------------
+        
+        This package provides a metaclass that allows classes implemented in
+        extension modules to be subclassed in Python.  Unless you need
+        ExtensionClasses for legacy applications (e.g. Zope 2), you probably
+        want to use Python's new-style classes (available since Python 2.2).
+        
+        ComputedAttribute
+        -----------------
+        
+        This package provides a way to attach attributes to an
+        ``ExtensionClass`` or instance that are computed by calling a
+        callable.  This works very much like ``property`` known from new-style
+        classes, except that a ``ComputedAttribute`` can also be attached to
+        an instance and that it honours ExtensionClass semantics (which is
+        useful for retaining Acquisition wrappers, for example).
+        
+        MethodObject
+        ------------
+        
+        This package lets you attach additional "methods" to ExtensionClasses.
+        These "methods" are actually implemented by subclassing the
+        ``MethodObject.Method`` class and implementing the ``__call__`` method
+        there.  Instances of those classes will be bound to the instances
+        they're attached to and will receive that instance object as a first
+        parameter (after ``self``).
+        
+        
+        Changelog
+        =========
+        
+        2.13.2 (2010-06-16)
+        -------------------
+        
+        - LP #587760: Handle tp_basicsize correctly.
+        
+        2.13.1 (2010-04-03)
+        -------------------
+        
+        - Removed undeclared testing dependency on zope.testing.
+        
+        - Removed cruft in ``pickle/pickle.c`` related to removed ``__getnewargs__``.
+        
+        2.13.0 (2010-02-22)
+        -------------------
+        
+        - Avoid defining ``__getnewargs__`` as not to defeat the ZODB persistent
+          reference optimization. Refs https://bugs.launchpad.net/zope2/+bug/143657.
+          In order to take advantage of this optimization, you need to re-save your
+          objects.
+        
+        2.12.0 (2010-02-14)
+        -------------------
+        
+        - Removed old build artifacts and some metadata cleanup.
+        
+        - Added support for method cache in ExtensionClass. Patch contributed by
+          Yoshinori K. Okuji. See https://bugs.launchpad.net/zope2/+bug/486182.
+        
+        2.11.3 (2009-08-02)
+        -------------------
+        
+        - Further 64-bit fixes (Python 2.4 compatibility).
+        
+        2.11.2 (2009-08-02)
+        -------------------
+        
+        - Fixed 64-bit compatibility issues for Python 2.5.x / 2.6.x.  See 
+          http://www.python.org/dev/peps/pep-0353/ for details.
+        
+        2.11.1 (2009-02-19)
+        -------------------
+        
+        - Initial egg release.
+        
+Platform: UNKNOWN

README.txt

+ExtensionClass and ExtensionClass-related packages
+==================================================
+
+ExtensionClass
+--------------
+
+This package provides a metaclass that allows classes implemented in
+extension modules to be subclassed in Python.  Unless you need
+ExtensionClasses for legacy applications (e.g. Zope 2), you probably
+want to use Python's new-style classes (available since Python 2.2).
+
+ComputedAttribute
+-----------------
+
+This package provides a way to attach attributes to an
+``ExtensionClass`` or instance that are computed by calling a
+callable.  This works very much like ``property`` known from new-style
+classes, except that a ``ComputedAttribute`` can also be attached to
+an instance and that it honours ExtensionClass semantics (which is
+useful for retaining Acquisition wrappers, for example).
+
+MethodObject
+------------
+
+This package lets you attach additional "methods" to ExtensionClasses.
+These "methods" are actually implemented by subclassing the
+``MethodObject.Method`` class and implementing the ``__call__`` method
+there.  Instances of those classes will be bound to the instances
+they're attached to and will receive that instance object as a first
+parameter (after ``self``).

bootstrap.py

+##############################################################################
+#
+# Copyright (c) 2006 Zope Foundation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+"""Bootstrap a buildout-based project
+
+Simply run this script in a directory containing a buildout.cfg.
+The script accepts buildout command-line options, so you can
+use the -c option to specify an alternate configuration file.
+
+$Id$
+"""
+
+import os, shutil, sys, tempfile, urllib2
+from optparse import OptionParser
+
+tmpeggs = tempfile.mkdtemp()
+
+is_jython = sys.platform.startswith('java')
+
+# parsing arguments
+parser = OptionParser()
+parser.add_option("-v", "--version", dest="version",
+                          help="use a specific zc.buildout version")
+parser.add_option("-d", "--distribute",
+                   action="store_true", dest="distribute", default=False,
+                   help="Use Disribute rather than Setuptools.")
+
+parser.add_option("-c", None, action="store", dest="config_file",
+                   help=("Specify the path to the buildout configuration "
+                         "file to be used."))
+
+options, args = parser.parse_args()
+
+# if -c was provided, we push it back into args for buildout' main function
+if options.config_file is not None:
+    args += ['-c', options.config_file]
+
+if options.version is not None:
+    VERSION = '==%s' % options.version
+else:
+    VERSION = ''
+
+USE_DISTRIBUTE = options.distribute
+args = args + ['bootstrap']
+
+to_reload = False
+try:
+    import pkg_resources
+    if not hasattr(pkg_resources, '_distribute'):
+        to_reload = True
+        raise ImportError
+except ImportError:
+    ez = {}
+    if USE_DISTRIBUTE:
+        exec urllib2.urlopen('http://python-distribute.org/distribute_setup.py'
+                         ).read() in ez
+        ez['use_setuptools'](to_dir=tmpeggs, download_delay=0, no_fake=True)
+    else:
+        exec urllib2.urlopen('http://peak.telecommunity.com/dist/ez_setup.py'
+                             ).read() in ez
+        ez['use_setuptools'](to_dir=tmpeggs, download_delay=0)
+
+    if to_reload:
+        reload(pkg_resources)
+    else:
+        import pkg_resources
+
+if sys.platform == 'win32':
+    def quote(c):
+        if ' ' in c:
+            return '"%s"' % c # work around spawn lamosity on windows
+        else:
+            return c
+else:
+    def quote (c):
+        return c
+
+cmd = 'from setuptools.command.easy_install import main; main()'
+ws  = pkg_resources.working_set
+
+if USE_DISTRIBUTE:
+    requirement = 'distribute'
+else:
+    requirement = 'setuptools'
+
+if is_jython:
+    import subprocess
+
+    assert subprocess.Popen([sys.executable] + ['-c', quote(cmd), '-mqNxd',
+           quote(tmpeggs), 'zc.buildout' + VERSION],
+           env=dict(os.environ,
+               PYTHONPATH=
+               ws.find(pkg_resources.Requirement.parse(requirement)).location
+               ),
+           ).wait() == 0
+
+else:
+    assert os.spawnle(
+        os.P_WAIT, sys.executable, quote (sys.executable),
+        '-c', quote (cmd), '-mqNxd', quote (tmpeggs), 'zc.buildout' + VERSION,
+        dict(os.environ,
+            PYTHONPATH=
+            ws.find(pkg_resources.Requirement.parse(requirement)).location
+            ),
+        ) == 0
+
+ws.add_entry(tmpeggs)
+ws.require('zc.buildout' + VERSION)
+import zc.buildout.buildout
+zc.buildout.buildout.main(args)
+shutil.rmtree(tmpeggs)

buildout.cfg

+[buildout]
+develop = .
+parts = test
+
+versions = versions
+
+[test]
+recipe = zc.recipe.testrunner
+eggs = ExtensionClass
+
+[versions]
+zc.buildout = 1.4.3
+zc.recipe.egg = 1.2.2

setup.cfg

+[egg_info]
+tag_build = 
+tag_date = 0
+tag_svn_revision = 0
+

setup.py

+##############################################################################
+#
+# Copyright (c) 2007 Zope Foundation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+"""Setup for the ExtensionClass distribution
+"""
+import os
+from setuptools import setup, find_packages, Extension
+
+README = open('README.txt').read()
+CHANGES = open('CHANGES.txt').read()
+
+setup(name='ExtensionClass',
+      version = '2.13.2',
+      url='http://pypi.python.org/pypi/ExtensionClass',
+      license='ZPL 2.1',
+      description='Metaclass for subclassable extension types',
+      author='Zope Foundation and Contributors',
+      author_email='zope-dev@zope.org',
+      long_description='\n\n'.join([README, CHANGES]),
+
+      packages=find_packages('src'),
+      package_dir={'': 'src'},
+
+      ext_modules=[Extension("ExtensionClass._ExtensionClass",
+                             [os.path.join('src', 'ExtensionClass',
+                                           '_ExtensionClass.c')],
+                             include_dirs=['src']),
+                   Extension("ComputedAttribute._ComputedAttribute",
+                             [os.path.join('src', 'ComputedAttribute',
+                                           '_ComputedAttribute.c')],
+                             include_dirs=['src']),
+                   Extension("MethodObject._MethodObject",
+                             [os.path.join('src', 'MethodObject',
+                                           '_MethodObject.c')],
+                             include_dirs=['src']),
+                   ],
+      include_package_data=True,
+      zip_safe=False,
+      )

src/ComputedAttribute/_ComputedAttribute.c

+/*****************************************************************************
+
+  Copyright (c) 1996-2003 Zope Foundation and Contributors.
+  All Rights Reserved.
+
+  This software is subject to the provisions of the Zope Public License,
+  Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+  THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+  WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+  WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+  FOR A PARTICULAR PURPOSE
+
+ ****************************************************************************/
+#include "ExtensionClass/ExtensionClass.h"
+
+#define UNLESS(E) if(!(E))
+#define OBJECT(O) ((PyObject*)(O))
+
+typedef struct {
+  PyObject_HEAD
+  PyObject *callable;
+  int level;
+} CA;
+
+static PyObject *
+CA__init__(CA *self, PyObject *args)
+{
+  PyObject *callable;
+  int level=0;
+
+  UNLESS(PyArg_ParseTuple(args,"O|i",&callable, &level)) return NULL;
+
+  if (level > 0) 
+    {
+      callable=PyObject_CallFunction(OBJECT(self->ob_type), "Oi", 
+				     callable, level-1);
+      UNLESS (callable) return NULL;
+      self->level=level;
+    }
+  else
+    {
+      Py_INCREF(callable);
+      self->level=0;
+    }
+
+  self->callable=callable;
+
+  Py_INCREF(Py_None);
+  return Py_None;
+}
+
+static void
+CA_dealloc(CA *self)     
+{
+  Py_DECREF(self->callable);
+  Py_DECREF(self->ob_type);
+  PyObject_DEL(self);
+}
+
+static PyObject *
+CA_of(CA *self, PyObject *args)
+{
+  if (self->level > 0) 
+    {
+      Py_INCREF(self->callable);
+      return self->callable;
+    }
+
+  if (PyString_Check(self->callable))
+    {
+      /* Special case string as simple alias. */
+      PyObject *o;
+
+      UNLESS (PyArg_ParseTuple(args,"O", &o)) return NULL;
+      return PyObject_GetAttr(o, self->callable);
+    }
+
+  return PyObject_CallObject(self->callable, args);
+}
+
+static struct PyMethodDef CA_methods[] = {
+  {"__init__",(PyCFunction)CA__init__, METH_VARARGS, ""},
+  {"__of__",  (PyCFunction)CA_of,      METH_VARARGS, ""},
+  {NULL,		NULL}		/* sentinel */
+};
+
+static PyExtensionClass ComputedAttributeType = {
+  PyObject_HEAD_INIT(NULL) 0,
+  "ComputedAttribute", sizeof(CA),
+  0,
+  (destructor)CA_dealloc,
+  0,0,0,0,0,   0,0,0,   0,0,0,0,0,   0,0,
+  "ComputedAttribute(callable) -- Create a computed attribute",
+  METHOD_CHAIN(CA_methods), 
+  (void*)(EXTENSIONCLASS_BINDABLE_FLAG)
+};
+
+static struct PyMethodDef methods[] = {
+  {NULL,		NULL}
+};
+
+void
+init_ComputedAttribute(void)
+{
+  PyObject *m, *d;
+
+  UNLESS(ExtensionClassImported) return;
+  
+  /* Create the module and add the functions */
+  m = Py_InitModule4("_ComputedAttribute", methods,
+	   "Provide Computed Attributes\n\n"
+	   "$Id: _ComputedAttribute.c 110581 2010-04-07 15:04:20Z tseaver $\n",
+		     OBJECT(NULL),PYTHON_API_VERSION);
+
+  d = PyModule_GetDict(m);
+  PyExtensionClass_Export(d,"ComputedAttribute",ComputedAttributeType);
+}

src/ComputedAttribute/__init__.py

+from _ComputedAttribute import *

src/ComputedAttribute/tests.py

+##############################################################################
+#
+# Copyright (c) 2003 Zope Foundation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+"""Computed Attributes
+
+Computed attributes work much like properties:
+
+>>> import math
+>>> from ComputedAttribute import ComputedAttribute
+>>> from ExtensionClass import Base
+>>> class Point(Base):
+...    def __init__(self, x, y):
+...        self.x, self.y = x, y
+...    length = ComputedAttribute(lambda self: math.sqrt(self.x**2+self.y**2))
+
+>>> p = Point(3, 4)
+>>> "%.1f" % p.length
+'5.0'
+
+Except that you can also use computed attributes with instances:
+
+>>> p.angle = ComputedAttribute(lambda self: math.atan(self.y*1.0/self.x))
+>>> "%.2f" % p.angle
+'0.93'
+
+$Id: tests.py 111623 2010-04-30 13:55:00Z hannosch $
+"""
+
+def test_wrapper_support():
+    """Wrapper support
+
+    To support acquisition wrappers, computed attributes have a level.
+    The computation is only done when the level is zero. Retrieving a
+    computed attribute with a level > 0 returns a computed attribute
+    with a decremented level.
+
+    >>> from ExtensionClass import Base
+    >>> class X(Base):
+    ...     pass
+
+    >>> x = X()
+    >>> x.n = 1
+
+    >>> from ComputedAttribute import ComputedAttribute
+    >>> x.n2 = ComputedAttribute(lambda self: self.n*2)
+    >>> x.n2
+    2
+    >>> x.n2.__class__.__name__
+    'int'
+
+    >>> x.n2 = ComputedAttribute(lambda self: self.n*2, 2)
+    >>> x.n2.__class__.__name__
+    'ComputedAttribute'
+    >>> x.n2 = x.n2
+    >>> x.n2.__class__.__name__
+    'ComputedAttribute'
+    >>> x.n2 = x.n2
+    >>> x.n2.__class__.__name__
+    'int'
+    
+    """
+
+import unittest
+from doctest import DocTestSuite
+
+def test_suite():
+    return unittest.TestSuite((DocTestSuite(),))
+
+if __name__ == '__main__': unittest.main()

src/ExtensionClass.egg-info/PKG-INFO

+Metadata-Version: 1.0
+Name: ExtensionClass
+Version: 2.13.2
+Summary: Metaclass for subclassable extension types
+Home-page: http://pypi.python.org/pypi/ExtensionClass
+Author: Zope Foundation and Contributors
+Author-email: zope-dev@zope.org
+License: ZPL 2.1
+Description: ExtensionClass and ExtensionClass-related packages
+        ==================================================
+        
+        ExtensionClass
+        --------------
+        
+        This package provides a metaclass that allows classes implemented in
+        extension modules to be subclassed in Python.  Unless you need
+        ExtensionClasses for legacy applications (e.g. Zope 2), you probably
+        want to use Python's new-style classes (available since Python 2.2).
+        
+        ComputedAttribute
+        -----------------
+        
+        This package provides a way to attach attributes to an
+        ``ExtensionClass`` or instance that are computed by calling a
+        callable.  This works very much like ``property`` known from new-style
+        classes, except that a ``ComputedAttribute`` can also be attached to
+        an instance and that it honours ExtensionClass semantics (which is
+        useful for retaining Acquisition wrappers, for example).
+        
+        MethodObject
+        ------------
+        
+        This package lets you attach additional "methods" to ExtensionClasses.
+        These "methods" are actually implemented by subclassing the
+        ``MethodObject.Method`` class and implementing the ``__call__`` method
+        there.  Instances of those classes will be bound to the instances
+        they're attached to and will receive that instance object as a first
+        parameter (after ``self``).
+        
+        
+        Changelog
+        =========
+        
+        2.13.2 (2010-06-16)
+        -------------------
+        
+        - LP #587760: Handle tp_basicsize correctly.
+        
+        2.13.1 (2010-04-03)
+        -------------------
+        
+        - Removed undeclared testing dependency on zope.testing.
+        
+        - Removed cruft in ``pickle/pickle.c`` related to removed ``__getnewargs__``.
+        
+        2.13.0 (2010-02-22)
+        -------------------
+        
+        - Avoid defining ``__getnewargs__`` as not to defeat the ZODB persistent
+          reference optimization. Refs https://bugs.launchpad.net/zope2/+bug/143657.
+          In order to take advantage of this optimization, you need to re-save your
+          objects.
+        
+        2.12.0 (2010-02-14)
+        -------------------
+        
+        - Removed old build artifacts and some metadata cleanup.
+        
+        - Added support for method cache in ExtensionClass. Patch contributed by
+          Yoshinori K. Okuji. See https://bugs.launchpad.net/zope2/+bug/486182.
+        
+        2.11.3 (2009-08-02)
+        -------------------
+        
+        - Further 64-bit fixes (Python 2.4 compatibility).
+        
+        2.11.2 (2009-08-02)
+        -------------------
+        
+        - Fixed 64-bit compatibility issues for Python 2.5.x / 2.6.x.  See 
+          http://www.python.org/dev/peps/pep-0353/ for details.
+        
+        2.11.1 (2009-02-19)
+        -------------------
+        
+        - Initial egg release.
+        
+Platform: UNKNOWN

src/ExtensionClass.egg-info/SOURCES.txt

+CHANGES.txt
+COPYRIGHT.txt
+LICENSE.txt
+README.txt
+bootstrap.py
+buildout.cfg
+setup.py
+src/ComputedAttribute/_ComputedAttribute.c
+src/ComputedAttribute/__init__.py
+src/ComputedAttribute/tests.py
+src/ExtensionClass/ExtensionClass.h
+src/ExtensionClass/_ExtensionClass.c
+src/ExtensionClass/__init__.py
+src/ExtensionClass/tests.py
+src/ExtensionClass.egg-info/PKG-INFO
+src/ExtensionClass.egg-info/SOURCES.txt
+src/ExtensionClass.egg-info/dependency_links.txt
+src/ExtensionClass.egg-info/not-zip-safe
+src/ExtensionClass.egg-info/top_level.txt
+src/ExtensionClass/pickle/pickle.c
+src/MethodObject/_MethodObject.c
+src/MethodObject/__init__.py
+src/MethodObject/tests.py
\ No newline at end of file

src/ExtensionClass.egg-info/dependency_links.txt

+

src/ExtensionClass.egg-info/not-zip-safe

+

src/ExtensionClass.egg-info/top_level.txt

+ExtensionClass
+MethodObject
+ComputedAttribute

src/ExtensionClass/__init__.py

+##############################################################################
+#
+# Copyright (c) 2003 Zope Foundation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+"""ExtensionClass
+
+Extension Class exists to support types derived from the old ExtensionType
+meta-class that preceeded Python 2.2 and new-style classes.
+
+As a meta-class, ExtensionClass provides the following features:
+
+- Support for a class initialiser:
+
+  >>> from ExtensionClass import ExtensionClass, Base
+
+  >>> class C(Base):
+  ...   def __class_init__(self):
+  ...      print 'class init called'
+  ...      print self.__name__
+  ...   def bar(self):
+  ...      return 'bar called'
+  class init called
+  C
+  >>> c = C()
+  >>> int(c.__class__ is C)
+  1
+  >>> int(c.__class__ is type(c))
+  1
+
+- Making sure that every instance of the meta-class has Base as a base class:
+
+  >>> class X:
+  ...     __metaclass__ = ExtensionClass
+
+  >>> Base in X.__mro__
+  1
+
+- Provide an inheritedAttribute method for looking up attributes in
+  base classes:
+
+  >>> class C2(C):
+  ...   def bar(*a):
+  ...      return C2.inheritedAttribute('bar')(*a), 42
+  class init called
+  C2
+  >>> o = C2()
+  >>> o.bar()
+  ('bar called', 42)
+
+  This is for compatability with old code. New code should use super
+  instead.   
+
+The base class, Base, exists mainly to support the __of__ protocol.
+The __of__ protocol is similar to __get__ except that __of__ is called
+when an implementor is retrieved from an instance as well as from a
+class:
+
+>>> class O(Base):
+...   def __of__(*a):
+...      return a
+ 
+>>> o1 = O()
+>>> o2 = O()
+>>> C.o1 = o1
+>>> c.o2 = o2
+>>> c.o1 == (o1, c)
+1
+>>> C.o1 == o1
+1
+>>> int(c.o2 == (o2, c))
+1
+
+We accomplish this by making a class that implements __of__ a
+descriptor and treating all descriptor ExtensionClasses this way. That
+is, if an extension class is a descriptor, it's __get__ method will be
+called even when it is retrieved from an instance.
+
+>>> class O(Base):
+...   def __get__(*a):
+...      return a
+... 
+>>> o1 = O()
+>>> o2 = O()
+>>> C.o1 = o1
+>>> c.o2 = o2
+>>> int(c.o1 == (o1, c, type(c)))
+1
+>>> int(C.o1 == (o1, None, type(c)))
+1
+>>> int(c.o2 == (o2, c, type(c)))
+1
+  
+$Id: __init__.py 110581 2010-04-07 15:04:20Z tseaver $
+"""
+
+from _ExtensionClass import *

src/ExtensionClass/pickle/pickle.c

+/*
+
+ Copyright (c) 2003 Zope Foundation and Contributors.
+ All Rights Reserved.
+
+ This software is subject to the provisions of the Zope Public License,
+ Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+ THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+ WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+ FOR A PARTICULAR PURPOSE.
+
+*/
+/* 
+
+ Reusable pickle support code
+
+ This is "includeware", meant to be used through a C include
+
+ */
+
+/* It's a dang shame we can't inherit __get/setstate__ from object :( */
+
+static PyObject *str__slotnames__, *copy_reg_slotnames, *__newobj__;
+static PyObject *str__getnewargs__, *str__getstate__;
+
+#if PY_VERSION_HEX < 0x02050000 && !defined(PY_SSIZE_T_MIN)
+typedef int Py_ssize_t;
+#define PY_SSIZE_T_MAX INT_MAX
+#define PY_SSIZE_T_MIN INT_MIN
+#endif
+
+static int
+pickle_setup(void)
+{
+  PyObject *copy_reg;
+  int r = -1;
+
+#define DEFINE_STRING(S) \
+  if(! (str ## S = PyString_FromString(# S))) return -1
+  DEFINE_STRING(__slotnames__);
+  DEFINE_STRING(__getnewargs__);
+  DEFINE_STRING(__getstate__);
+#undef DEFINE_STRING
+
+  copy_reg = PyImport_ImportModule("copy_reg");
+  if (copy_reg == NULL)
+    return -1;
+
+  copy_reg_slotnames = PyObject_GetAttrString(copy_reg, "_slotnames");
+  if (copy_reg_slotnames == NULL)
+    goto end;
+
+  __newobj__ = PyObject_GetAttrString(copy_reg, "__newobj__");
+  if (__newobj__ == NULL)
+    goto end;
+
+  r = 0;
+ end:
+  Py_DECREF(copy_reg);
+  return r;
+}
+
+static PyObject *
+pickle_slotnames(PyTypeObject *cls)
+{
+  PyObject *slotnames;
+
+  slotnames = PyDict_GetItem(cls->tp_dict, str__slotnames__);
+  if (slotnames != NULL) 
+    {
+      Py_INCREF(slotnames);
+      return slotnames;
+    }
+
+  slotnames = PyObject_CallFunctionObjArgs(copy_reg_slotnames, (PyObject*)cls, 
+                                           NULL);
+  if (slotnames != NULL &&
+      slotnames != Py_None &&
+      ! PyList_Check(slotnames))
+    {
+      PyErr_SetString(PyExc_TypeError,
+                      "copy_reg._slotnames didn't return a list or None");
+      Py_DECREF(slotnames);
+      slotnames = NULL;
+    }
+  
+  return slotnames;
+}
+
+static PyObject *
+pickle_copy_dict(PyObject *state)
+{
+  PyObject *copy, *key, *value;
+  char *ckey;
+  Py_ssize_t pos = 0;
+  Py_ssize_t nr;
+
+  copy = PyDict_New();
+  if (copy == NULL)
+    return NULL;
+
+  if (state == NULL)
+    return copy;
+
+  while ((nr = PyDict_Next(state, &pos, &key, &value))) 
+    {
+      if (nr < 0)
+        goto err;
+
+      if (key && PyString_Check(key))
+        {
+          ckey = PyString_AS_STRING(key);
+          if (*ckey == '_' &&
+              (ckey[1] == 'v' || ckey[1] == 'p') &&
+              ckey[2] == '_')
+            /* skip volatile and persistent */
+            continue;
+        }
+
+      if (key != NULL && value != NULL &&
+          (PyObject_SetItem(copy, key, value) < 0)
+          )
+        goto err;
+    }
+  
+  return copy;
+ err:
+  Py_DECREF(copy);
+  return NULL;
+}
+
+
+static char pickle___getstate__doc[] =
+"Get the object serialization state\n"
+"\n"
+"If the object has no assigned slots and has no instance dictionary, then \n"
+"None is returned.\n"
+"\n"
+"If the object has no assigned slots and has an instance dictionary, then \n"
+"the a copy of the instance dictionary is returned. The copy has any items \n"
+"with names starting with '_v_' or '_p_' ommitted.\n"
+"\n"
+"If the object has assigned slots, then a two-element tuple is returned.  \n"
+"The first element is either None or a copy of the instance dictionary, \n"
+"as described above. The second element is a dictionary with items \n"
+"for each of the assigned slots.\n"
+;
+
+static PyObject *
+pickle___getstate__(PyObject *self)
+{
+  PyObject *slotnames=NULL, *slots=NULL, *state=NULL;
+  PyObject **dictp;
+  int n=0;
+
+  slotnames = pickle_slotnames(self->ob_type);
+  if (slotnames == NULL)
+    return NULL;
+
+  dictp = _PyObject_GetDictPtr(self);
+  if (dictp)
+    state = pickle_copy_dict(*dictp);
+  else 
+    {
+      state = Py_None;
+      Py_INCREF(state);
+    }
+
+  if (slotnames != Py_None)
+    {
+      int i;
+
+      slots = PyDict_New();
+      if (slots == NULL)
+        goto end;
+
+      for (i = 0; i < PyList_GET_SIZE(slotnames); i++) 
+        {
+          PyObject *name, *value;
+          char *cname;
+
+          name = PyList_GET_ITEM(slotnames, i);
+          if (PyString_Check(name))
+            {
+              cname = PyString_AS_STRING(name);
+              if (*cname == '_' &&
+                  (cname[1] == 'v' || cname[1] == 'p') &&
+                  cname[2] == '_')
+                /* skip volatile and persistent */
+                continue;
+            }
+
+          value = PyObject_GetAttr(self, name);
+          if (value == NULL)
+            PyErr_Clear();
+          else 
+            {
+              int err = PyDict_SetItem(slots, name, value);
+              Py_DECREF(value);
+              if (err)
+                goto end;
+              n++;
+            }
+        }
+    }
+
+  if (n) 
+    state = Py_BuildValue("(NO)", state, slots);
+
+ end:
+  Py_XDECREF(slotnames);
+  Py_XDECREF(slots);
+  
+  return state;
+}
+
+static int
+pickle_setattrs_from_dict(PyObject *self, PyObject *dict)
+{
+  PyObject *key, *value;
+  Py_ssize_t pos = 0;
+  
+  if (! PyDict_Check(dict))
+    {
+      PyErr_SetString(PyExc_TypeError, "Expected dictionary");
+      return -1;
+    }
+  
+  while (PyDict_Next(dict, &pos, &key, &value)) 
+    {
+      if (key != NULL && value != NULL &&
+          (PyObject_SetAttr(self, key, value) < 0)
+          )
+        return -1;
+    }
+  return 0;
+}
+
+static char pickle___setstate__doc[] =
+"Set the object serialization state\n"
+"\n"
+"The state should be in one of 3 forms:\n"
+"\n"
+"- None\n"
+"\n"
+"  Ignored\n"
+"\n"
+"- A dictionary\n"
+"\n"
+"  In this case, the object's instance dictionary will be cleared and \n"
+"  updated with the new state.\n"
+"\n"
+"- A two-tuple with a string as the first element.  \n"
+"\n"
+"  In this case, the method named by the string in the first element will be\n"
+"  called with the second element.\n"
+"\n"
+"  This form supports migration of data formats.\n"
+"\n"
+"- A two-tuple with None or a Dictionary as the first element and\n"
+"  with a dictionary as the second element.\n"
+"\n"
+"  If the first element is not None, then the object's instance dictionary \n"
+"  will be cleared and updated with the value.\n"
+"\n"
+"  The items in the second element will be assigned as attributes.\n"
+;
+
+static PyObject *
+pickle___setstate__(PyObject *self, PyObject *state)
+{
+  PyObject *slots=NULL;
+
+  if (PyTuple_Check(state))
+    {
+      if (! PyArg_ParseTuple(state, "OO", &state, &slots))
+        return NULL;
+    }
+
+  if (state != Py_None)
+    {
+      PyObject **dict;
+
+      dict = _PyObject_GetDictPtr(self);
+      if (dict)
+        {
+          if (*dict == NULL)
+            {
+              *dict = PyDict_New();
+              if (*dict == NULL)
+                return NULL;
+            }
+        }
+
+      if (*dict != NULL)
+        {
+          PyDict_Clear(*dict);
+          if (PyDict_Update(*dict, state) < 0)
+            return NULL;
+        }
+      else if (pickle_setattrs_from_dict(self, state) < 0)
+        return NULL;
+    }
+
+  if (slots != NULL && pickle_setattrs_from_dict(self, slots) < 0)
+    return NULL;
+
+  Py_INCREF(Py_None);
+  return Py_None;
+}
+
+static char pickle___reduce__doc[] = 
+"Reduce an object to contituent parts for serialization\n"
+;
+
+static PyObject *
+pickle___reduce__(PyObject *self)
+{
+  PyObject *args=NULL, *bargs=0, *state=NULL;
+  int l, i;
+
+  /* we no longer require '__getnewargs__' to be defined but use it if it is */
+  PyObject *getnewargs=NULL;
+
+  getnewargs = PyObject_GetAttr(self, str__getnewargs__);
+  if (getnewargs)
+    bargs = PyEval_CallObject(getnewargs, (PyObject *)NULL);
+  else {
+    PyErr_Clear();
+    bargs = PyTuple_New(0);
+  }
+
+  l = PyTuple_Size(bargs);
+  if (l < 0)
+    goto end;
+
+  args = PyTuple_New(l+1);
+  if (args == NULL)
+    goto end;
+  
+  Py_INCREF(self->ob_type);
+  PyTuple_SET_ITEM(args, 0, (PyObject*)(self->ob_type));
+  for (i = 0; i < l; i++)
+    {
+      Py_INCREF(PyTuple_GET_ITEM(bargs, i));
+      PyTuple_SET_ITEM(args, i+1, PyTuple_GET_ITEM(bargs, i));
+    }
+  
+  state = PyObject_CallMethodObjArgs(self, str__getstate__, NULL);
+  if (state == NULL)
+    goto end;
+
+  state = Py_BuildValue("(OON)", __newobj__, args, state);
+
+ end:
+  Py_XDECREF(bargs);
+  Py_XDECREF(args);
+  Py_XDECREF(getnewargs);
+
+  return state;
+}
+
+#define PICKLE_GETSTATE_DEF \
+{"__getstate__", (PyCFunction)pickle___getstate__, METH_NOARGS,      \
+   pickle___getstate__doc},
+
+#define PICKLE_SETSTATE_DEF \
+{"__setstate__", (PyCFunction)pickle___setstate__, METH_O,           \
+   pickle___setstate__doc},                                          
+
+#define PICKLE_GETNEWARGS_DEF
+
+#define PICKLE_REDUCE_DEF \
+{"__reduce__", (PyCFunction)pickle___reduce__, METH_NOARGS,          \
+   pickle___reduce__doc},
+
+#define PICKLE_METHODS PICKLE_GETSTATE_DEF PICKLE_SETSTATE_DEF \
+                       PICKLE_GETNEWARGS_DEF PICKLE_REDUCE_DEF

src/MethodObject/_MethodObject.c

+/*****************************************************************************
+
+  Copyright (c) 1996-2002 Zope Foundation and Contributors.
+  All Rights Reserved.
+
+  This software is subject to the provisions of the Zope Public License,
+  Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+  THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+  WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+  WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+  FOR A PARTICULAR PURPOSE
+
+ ****************************************************************************/
+
+#include "ExtensionClass/ExtensionClass.h"
+
+static PyObject *
+of(PyObject *self, PyObject *args)
+{
+  PyObject *inst;
+
+  if(PyArg_Parse(args,"O",&inst)) return PyECMethod_New(self,inst);
+  else return NULL;
+}
+
+struct PyMethodDef Method_methods[] = {
+  {"__of__",(PyCFunction)of,0,""},  
+  {NULL,		NULL}		/* sentinel */
+};
+
+static struct PyMethodDef methods[] = {{NULL,	NULL}};
+
+void
+init_MethodObject(void)
+{
+  PyObject *m, *d;
+  PURE_MIXIN_CLASS(Method,
+	"Base class for objects that want to be treated as methods\n"
+	"\n"
+	"The method class provides a method, __of__, that\n"
+	"binds an object to an instance.  If a method is a subobject\n"
+	"of an extension-class instance, the the method will be bound\n"
+	"to the instance and when the resulting object is called, it\n"
+	"will call the method and pass the instance in addition to\n"
+	"other arguments.  It is the responsibility of Method objects\n"
+	"to implement (or inherit) a __call__ method.\n",
+	Method_methods);
+
+  /* Create the module and add the functions */
+  m = Py_InitModule4("_MethodObject", methods,
+		     "Method-object mix-in class module\n\n"
+		     "$Id: _MethodObject.c 110581 2010-04-07 15:04:20Z tseaver $\n",
+		     (PyObject*)NULL,PYTHON_API_VERSION);
+
+  d = PyModule_GetDict(m);
+  PyExtensionClass_Export(d,"Method",MethodType);
+}
+

src/MethodObject/__init__.py

+from _MethodObject import *

src/MethodObject/tests.py

+##############################################################################
+#
+# Copyright (c) 2003 Zope Foundation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+
+def test_methodobject():
+    """
+    >>> from ExtensionClass import Base
+    >>> from MethodObject import Method
+
+    >>> class foo(Method):
+    ...     def __call__(self, ob, *args, **kw):
+    ...         print 'called', ob, args, kw
+
+    >>> class bar(Base):
+    ...     def __repr__(self):
+    ...         return "bar()"
+    ...     hi = foo()
+
+    >>> x = bar()
+    >>> hi = x.hi
+    >>> hi(1,2,3,name='spam')
+    called bar() (1, 2, 3) {'name': 'spam'}
+    """
+
+
+def test_suite():
+    import unittest
+    from doctest import DocTestSuite
+    return unittest.TestSuite((
+        DocTestSuite(),
+        ))