Dump initial cut of code into github.

.gitignore

@@ -18,6 +18,11 @@ develop-eggs
 lib
 lib64
 
+man
+include
+.Python
+MANIFEST
+
 # Installer logs
 pip-log.txt
 

setup.py

@@ -0,0 +1,11 @@
+from distutils.core import setup
+
+setup(name = 'wrapt',
+      version = '0.9',
+      description = 'Module for decorators, wrappers and monkey patching.',
+      author = 'Graham Dumpleton',
+      author_email = 'Graham.Dumpleton@gmail.com',
+      license = 'BSD',
+      url = 'https://github.com/GrahamDumpleton/wrapt',
+      packages = ['wrapt'],
+     )

tox.ini

@@ -0,0 +1,7 @@
+[tox]
+envlist =
+
+[testenv]
+deps = nose
+commands =
+  nosetests -v []

wrapt/__init__.py

@@ -0,0 +1,5 @@
+from .wrappers import GenericWrapper, FunctionWrapper, InstanceMethodWrapper
+from .decorators import (generic_decorator, function_decorator,
+        instancemethod_decorator)
+from .exceptions import (UnexpectedDefaultParameters, MissingDefaultParameter,
+        UnexpectedParameters)

wrapt/decorators.py

@@ -0,0 +1,159 @@
+"""This module implements a set of decorators for implementing other
+decorators. These can be generic decorators where there is never a specific
+requirement to reliably process the inbound arguments being passed to the
+wrapped function, or more specific decorators designed just for functions,
+instance methods etc.
+
+"""
+
+from functools import wraps, partial
+from inspect import getargspec
+
+from .wrappers import GenericWrapper, FunctionWrapper, InstanceMethodWrapper
+from .exceptions import (UnexpectedDefaultParameters, MissingDefaultParameter,
+        UnexpectedParameters)
+
+def _decorator_factory(wrapper_type):
+    # This decorator factory serves as a way of parameterising our
+    # decorators based on the wrapper type. The wrapper type determines
+    # whether or not descriptor behaviour is supported and the number of
+    # arguments which are then in turn passed to the wrapper function
+    # supplied by the user, which implements their decorator. In other
+    # words, it saves us from duplicating all of this code for the
+    # different decorator types we provide for constructing the users
+    # decorators.
+
+    def _decorator_binder(wrapper=None, adapter=None, **default_params):
+        # The binder works out whether the user decorator will have its
+        # own parameters. Parameters for the user decorator must always
+        # be specified using keyword arguments and must always have
+        # defaults. The user cannot use 'wrapper' or 'adapter' for their
+        # own parameters as we use them ourselves and so they are
+        # effectively reserved. The 'wrapper' argument being how the
+        # user's wrapper function is passed in. The 'adapter' argument
+        # is used to optionally denote a function which is an adapter,
+        # which changes the effective prototype of the wrapped function.
+        # The latter is used to ensure that any function argument
+        # specification returned by the final result of any decorator is
+        # correct and reflects that of the adapter and not the wrapped
+        # function.
+
+        if wrapper is not None:
+            # The wrapper has been provided, so we must also have any
+            # optional default keyword parameters for the user decorator
+            # at this point if they were supplied. Before constructing
+            # the decorator we validate if the list of supplied default
+            # parameters are actually the same as what the users wrapper
+            # function expects.
+
+            expected_arglist = wrapper_type.WRAPPER_ARGLIST
+            complete_arglist = getargspec(wrapper).args
+
+            received_names = set(default_params.keys())
+            expected_names = complete_arglist[len(expected_arglist):]
+
+            for name in expected_names:
+                try:
+                    received_names.remove(name)
+                except KeyError:
+                    raise MissingDefaultParameter('Expected value for '
+                            'default parameter %r was not supplied for '
+                            'decorator %r.' % (name, wrapper.__name__))
+            if received_names:
+                raise UnexpectedDefaultParameters('Unexpected default '
+                        'parameters %r supplied for decorator %r.' % (
+                        list(received_names), wrapper.__name__))
+
+            # If we do have default parameters, the final decorator we
+            # create needs to be constructed a bit differently as when
+            # that decorator is used, it needs to accept parameters.
+            # Those parameters need not be supplied, but at least an
+            # empty argument list needs to be used on the decorator at
+            # that point. When parameters are supplied, they can be as
+            # either positional or keyword arguments.
+
+            if len(complete_arglist) > len(expected_arglist):
+                # For the case where the decorator is able to accept
+                # parameters, return a partial wrapper to collect the
+                # parameters.
+
+                @wraps(wrapper)
+                def _partial(*decorator_args, **decorator_kwargs):
+                    # Since the supply of parameters is optional due to
+                    # having defaults, we need to construct a final set
+                    # of parameters by overlaying those finally supplied
+                    # to the decorator at the point of use over the
+                    # defaults. As we accept positional parameters, we
+                    # need to translate those back to keyword parameters
+                    # in the process. This allows us to pass just one
+                    # dictionary of parameters and we can validate the
+                    # set of parameters at the point the decorator is
+                    # used and not only let it fail at the time the
+                    # wrapped function is called.
+
+                    if len(decorator_args) > len(expected_names):
+                        raise UnexpectedParameters('Expected at most %r '
+                                'positional parameters for decorator %r, '
+                                'but received %r.' % (len(expected_names),
+                                 wrapper.__name__, len(decorator_args)))
+
+                    unexpected_params = []
+                    for name in decorator_kwargs:
+                        if name not in default_params:
+                            unexpected_params.append(name)
+
+                    if unexpected_params:
+                        raise UnexpectedParameters('Unexpected parameters '
+                                '%r supplied for decorator %r.' % (
+                                unexpected_params, wrapper.__name__))
+
+                    complete_params = dict(default_params)
+
+                    for i, arg in enumerate(decorator_args):
+                        if expected_names[i] in decorator_kwargs:
+                            raise UnexpectedParameters('Positional parameter '
+                                    '%r also supplied as keyword parameter '
+                                    'to decorator %r.' % (expected_names[i],
+                                    wrapper.__name__))
+                        decorator_kwargs[expected_names[i]] = arg
+
+                    complete_params.update(decorator_kwargs)
+
+                    # Now create and return the final wrapper which
+                    # combines the parameters with the wrapped function.
+
+                    def _wrapper(func):
+                        return wrapper_type(wrapped=func, wrapper=wrapper,
+                                adapter=adapter, params=complete_params)
+                    return _wrapper
+
+                # Here is where the partial wrapper is returned. This is
+                # effectively the users decorator.
+
+                return _partial
+
+            else:
+                # No parameters so create and return the final wrapper.
+                # This is effectively the users decorator.
+
+                @wraps(wrapper)
+                def _wrapper(func):
+                    return wrapper_type(wrapped=func, wrapper=wrapper,
+                            adapter=adapter)
+                return _wrapper
+
+        else:
+            # The wrapper still has not been provided, so we are just
+            # collecting the optional default keyword parameters for the
+            # users decorator at this point. Return the binder again as
+            # a partial using the collected default parameters and the
+            # adapter function if one is being used.
+
+            return partial(_decorator_binder, adapter=adapter,
+                    **default_params)
+
+    return _decorator_binder
+
+generic_decorator = _decorator_factory(GenericWrapper)
+function_decorator = _decorator_factory(FunctionWrapper)
+instancemethod_decorator = _decorator_factory(InstanceMethodWrapper)

wrapt/exceptions.py

@@ -0,0 +1,3 @@
+class UnexpectedDefaultParameters(Exception): pass
+class MissingDefaultParameter(Exception): pass
+class UnexpectedParameters(Exception): pass

wrapt/six.py

@@ -0,0 +1,423 @@
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+# Copyright (c) 2010-2013 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.3.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+            def __len__(self):
+                return 1 << 31
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)
+        # This is a bit ugly, but it avoids running this again.
+        delattr(tp, self.name)
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+
+class _MovedItems(types.ModuleType):
+    """Lazy loading of moved objects"""
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("reload_module", "__builtin__", "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("winreg", "_winreg"),
+]
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+del attr
+
+moves = sys.modules[__name__ + ".moves"] = _MovedItems("moves")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+
+    _iterkeys = "keys"
+    _itervalues = "values"
+    _iteritems = "items"
+    _iterlists = "lists"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+    _iterkeys = "iterkeys"
+    _itervalues = "itervalues"
+    _iteritems = "iteritems"
+    _iterlists = "iterlists"
+
+
+try:
+    advance_iterator = next
+except NameError:
+    def advance_iterator(it):
+        return it.next()
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    Iterator = object
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    class Iterator(object):
+
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+def iterkeys(d, **kw):
+    """Return an iterator over the keys of a dictionary."""
+    return iter(getattr(d, _iterkeys)(**kw))
+
+def itervalues(d, **kw):
+    """Return an iterator over the values of a dictionary."""
+    return iter(getattr(d, _itervalues)(**kw))
+
+def iteritems(d, **kw):
+    """Return an iterator over the (key, value) pairs of a dictionary."""
+    return iter(getattr(d, _iteritems)(**kw))
+
+def iterlists(d, **kw):
+    """Return an iterator over the (key, [values]) pairs of a dictionary."""
+    return iter(getattr(d, _iterlists)(**kw))
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+    def u(s):
+        return s
+    unichr = chr
+    if sys.version_info[1] <= 1:
+        def int2byte(i):
+            return bytes((i,))
+    else:
+        # This is about 2x faster than the implementation above on 3.2+
+        int2byte = operator.methodcaller("to_bytes", 1, "big")
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+else:
+    def b(s):
+        return s
+    def u(s):
+        return unicode(s, "unicode_escape")
+    unichr = unichr
+    int2byte = chr
+    def byte2int(bs):
+        return ord(bs[0])
+    def indexbytes(buf, i):
+        return ord(buf[i])
+    def iterbytes(buf):
+        return (ord(byte) for byte in buf)
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+if PY3:
+    import builtins
+    exec_ = getattr(builtins, "exec")
+
+
+    def reraise(tp, value, tb=None):
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+
+    print_ = getattr(builtins, "print")
+    del builtins
+
+else:
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+
+    exec_("""def reraise(tp, value, tb=None):
+    raise tp, value, tb
+""")
+
+
+    def print_(*args, **kwargs):
+        """The new-style print function."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+
+_add_doc(reraise, """Reraise an exception.""")
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    return meta("NewBase", bases, {})

wrapt/tests/decorators.py

@@ -0,0 +1,13 @@
+import wrapt
+
+@wrapt.generic_decorator
+def passthru_generic_decorator(wrapped, obj, cls, args, kwargs):
+    return wrapped(*args, **kwargs)
+
+@wrapt.function_decorator
+def passthru_function_decorator(wrapped, args, kwargs):
+    return wrapped(*args, **kwargs)
+
+@wrapt.instancemethod_decorator
+def passthru_instancemethod_decorator(wrapped, obj, cls, args, kwargs):
+    return wrapped(*args, **kwargs)

wrapt/tests/test_function.py

@@ -0,0 +1,76 @@
+from __future__ import print_function
+
+import unittest
+import inspect
+
+import wrapt
+
+from .decorators import passthru_function_decorator
+
+def function(arg):
+    '''documentation'''
+    return arg
+
+original = function
+
+@passthru_function_decorator
+def function(arg):
+    '''documentation'''
+    return arg
+
+class TestNamingFunction(unittest.TestCase):
+
+    def test_object_name(self):
+        # Test preservation of function __name__ attribute.
+
+        self.assertEqual(function.__name__, original.__name__)
+
+    def test_object_qualname(self):
+        # Test preservation of function __qualname__ attribute.
+
+        try:
+            __qualname__ = original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(function.__qualname__, __qualname__)
+
+    def test_module_name(self):
+       # Test preservation of function __module__ attribute.
+
+        self.assertEqual(function.__module__, __name__)
+
+    def test_doc_string(self):
+        # Test preservation of function __doc__ attribute.
+
+        self.assertEqual(function.__doc__, original.__doc__)
+
+    def test_argspec(self):
+        # Test preservation of function argument specification.
+
+        original_argspec = inspect.getargspec(original)
+        function_argspec = inspect.getargspec(function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(function, type(original)))
+
+class TestCallingFunction(unittest.TestCase):
+
+    def test_call_function(self):
+        _args = (1, 2)
+        _kwargs = { 'one': 1, 'two': 2 }
+
+        @wrapt.function_decorator
+        def _decorator(wrapped, args, kwargs):
+            return wrapped(*args, **kwargs)
+
+        @_decorator
+        def _function(*args, **kwargs):
+            return args, kwargs
+
+        result = _function(*_args, **_kwargs)
+
+        self.assertEqual(result, (_args, _kwargs))

wrapt/tests/test_inner_classmethod.py

@@ -0,0 +1,105 @@
+from __future__ import print_function
+
+import unittest
+import inspect
+
+from .decorators import passthru_generic_decorator
+
+class Class(object):
+    @classmethod
+    def function(self, arg):
+        '''documentation'''
+        return arg
+
+Original = Class
+
+class Class(object):
+    @passthru_generic_decorator
+    @classmethod
+    def function(self, arg):
+        '''documentation'''
+        return arg
+
+class TestCase(unittest.TestCase):
+
+    def test_class_object_name(self):
+        # Test preservation of instance method __name__ attribute.
+
+        self.assertEqual(Class.function.__name__,
+                Original.function.__name__)
+
+    def test_instance_object_name(self):
+        # Test preservation of instance method __name__ attribute.
+
+        self.assertEqual(Class().function.__name__,
+                Original().function.__name__)
+
+    def test_class_object_qualname(self):
+        # Test preservation of instance method __qualname__ attribute.
+
+        try:
+            __qualname__ = Original.original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(Class.function.__qualname__, __qualname__)
+
+    def test_instance_object_qualname(self):
+        # Test preservation of instance method __qualname__ attribute.
+
+        try:
+            __qualname__ = Original().original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(Class().function.__qualname__, __qualname__)
+
+    def test_class_module_name(self):
+       # Test preservation of instance method __module__ attribute.
+
+        self.assertEqual(Class.function.__module__,
+                Original.function.__module__)
+
+    def test_instance_module_name(self):
+       # Test preservation of instance method __module__ attribute.
+
+        self.assertEqual(Class().function.__module__,
+                Original().function.__module__)
+
+    def test_class_doc_string(self):
+        # Test preservation of instance method __doc__ attribute.
+
+        self.assertEqual(Class.function.__doc__,
+                Original.function.__doc__)
+
+    def test_instance_doc_string(self):
+        # Test preservation of instance method __doc__ attribute.
+
+        self.assertEqual(Class().function.__doc__,
+                Original().function.__doc__)
+
+    def test_class_argspec(self):
+        # Test preservation of instance method argument specification.
+
+        original_argspec = inspect.getargspec(Original.function)
+        function_argspec = inspect.getargspec(Class.function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_instance_argspec(self):
+        # Test preservation of instance method argument specification.
+
+        original_argspec = inspect.getargspec(Original().function)
+        function_argspec = inspect.getargspec(Class().function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_class_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(Class.function,
+                type(Original.function)))
+
+    def test_instance_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(Class().function,
+                type(Original().function)))

wrapt/tests/test_inner_staticmethod.py

@@ -0,0 +1,105 @@
+from __future__ import print_function
+
+import unittest
+import inspect
+
+from .decorators import passthru_generic_decorator
+
+class Class(object):
+    @staticmethod
+    def function(self, arg):
+        '''documentation'''
+        return arg
+
+Original = Class
+
+class Class(object):
+    @passthru_generic_decorator
+    @staticmethod
+    def function(self, arg):
+        '''documentation'''
+        return arg
+
+class TestCase(unittest.TestCase):
+
+    def test_class_object_name(self):
+        # Test preservation of instance method __name__ attribute.
+
+        self.assertEqual(Class.function.__name__,
+                Original.function.__name__)
+
+    def test_instance_object_name(self):
+        # Test preservation of instance method __name__ attribute.
+
+        self.assertEqual(Class().function.__name__,
+                Original().function.__name__)
+
+    def test_class_module_name(self):
+       # Test preservation of instance method __module__ attribute.
+
+        self.assertEqual(Class.function.__module__,
+                Original.function.__module__)
+
+    def test_class_object_qualname(self):
+        # Test preservation of instance method __qualname__ attribute.
+
+        try:
+            __qualname__ = Original.original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(Class.function.__qualname__, __qualname__)
+
+    def test_instance_object_qualname(self):
+        # Test preservation of instance method __qualname__ attribute.
+
+        try:
+            __qualname__ = Original().original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(Class().function.__qualname__, __qualname__)
+
+    def test_instance_module_name(self):
+       # Test preservation of instance method __module__ attribute.
+
+        self.assertEqual(Class().function.__module__,
+                Original().function.__module__)
+
+    def test_class_doc_string(self):
+        # Test preservation of instance method __doc__ attribute.
+
+        self.assertEqual(Class.function.__doc__,
+                Original.function.__doc__)
+
+    def test_instance_doc_string(self):
+        # Test preservation of instance method __doc__ attribute.
+
+        self.assertEqual(Class().function.__doc__,
+                Original().function.__doc__)
+
+    def test_class_argspec(self):
+        # Test preservation of instance method argument specification.
+
+        original_argspec = inspect.getargspec(Original.function)
+        function_argspec = inspect.getargspec(Class.function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_instance_argspec(self):
+        # Test preservation of instance method argument specification.
+
+        original_argspec = inspect.getargspec(Original().function)
+        function_argspec = inspect.getargspec(Class().function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_class_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(Class.function,
+                type(Original.function)))
+
+    def test_instance_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(Class().function,
+                type(Original().function)))

wrapt/tests/test_instancemethod.py

@@ -0,0 +1,306 @@
+from __future__ import print_function
+
+import unittest
+import inspect
+
+import wrapt
+
+from .decorators import passthru_instancemethod_decorator
+
+class OldClass1d():
+    def function(self, arg):
+        '''documentation'''
+        return arg
+
+OldClass1o = OldClass1d
+
+class OldClass1d():
+    @passthru_instancemethod_decorator
+    def function(self, arg):
+        '''documentation'''
+        return arg
+
+class TestNamingInstanceMethodOldStyle(unittest.TestCase):
+
+    def test_class_object_name(self):
+        # Test preservation of instance method __name__ attribute.
+
+        self.assertEqual(OldClass1d.function.__name__,
+                OldClass1o.function.__name__)
+
+    def test_instance_object_name(self):
+        # Test preservation of instance method __name__ attribute.
+
+        self.assertEqual(OldClass1d().function.__name__,
+                OldClass1o().function.__name__)
+
+    def test_class_object_qualname(self):
+        # Test preservation of instance method __qualname__ attribute.
+
+        try:
+            __qualname__ = OldClass1o.original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(OldClass1d.function.__qualname__, __qualname__)
+
+    def test_instance_object_qualname(self):
+        # Test preservation of instance method __qualname__ attribute.
+
+        try:
+            __qualname__ = OldClass1o().original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(OldClass1d().function.__qualname__, __qualname__)
+
+    def test_class_module_name(self):
+       # Test preservation of instance method __module__ attribute.
+
+        self.assertEqual(OldClass1d.function.__module__,
+                OldClass1o.function.__module__)
+
+    def test_instance_module_name(self):
+       # Test preservation of instance method __module__ attribute.
+
+        self.assertEqual(OldClass1d().function.__module__,
+                OldClass1o().function.__module__)
+
+    def test_class_doc_string(self):
+        # Test preservation of instance method __doc__ attribute.
+
+        self.assertEqual(OldClass1d.function.__doc__,
+                OldClass1o.function.__doc__)
+
+    def test_instance_doc_string(self):
+        # Test preservation of instance method __doc__ attribute.
+
+        self.assertEqual(OldClass1d().function.__doc__,
+                OldClass1o().function.__doc__)
+
+    def test_class_argspec(self):
+        # Test preservation of instance method argument specification.
+
+        original_argspec = inspect.getargspec(OldClass1o.function)
+        function_argspec = inspect.getargspec(OldClass1d.function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_instance_argspec(self):
+        # Test preservation of instance method argument specification.
+
+        original_argspec = inspect.getargspec(OldClass1o().function)
+        function_argspec = inspect.getargspec(OldClass1d().function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_class_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(OldClass1d.function,
+                type(OldClass1o.function)))
+
+    def test_instance_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(OldClass1d().function,
+                type(OldClass1o().function)))
+
+class NewClass1d(object):
+    def function(self, arg):
+        '''documentation'''
+        return arg
+
+NewClass1o = NewClass1d
+
+class NewClass1d(object):
+    @passthru_instancemethod_decorator
+    def function(self, arg):
+        '''documentation'''
+        return arg
+
+class TestNamingInstanceMethodNewStyle(unittest.TestCase):
+
+    def test_class_object_name(self):
+        # Test preservation of instance method __name__ attribute.
+
+        self.assertEqual(NewClass1d.function.__name__,
+                NewClass1o.function.__name__)
+
+    def test_instance_object_name(self):
+        # Test preservation of instance method __name__ attribute.
+
+        self.assertEqual(NewClass1d().function.__name__,
+                NewClass1o().function.__name__)
+
+    def test_class_object_qualname(self):
+        # Test preservation of instance method __qualname__ attribute.
+
+        try:
+            __qualname__ = NewClass1o.original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(NewClass1d.function.__qualname__, __qualname__)
+
+    def test_instance_object_qualname(self):
+        # Test preservation of instance method __qualname__ attribute.
+
+        try:
+            __qualname__ = NewClass1o().original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(NewClass1d().function.__qualname__, __qualname__)
+
+    def test_class_module_name(self):
+       # Test preservation of instance method __module__ attribute.
+
+        self.assertEqual(NewClass1d.function.__module__,
+                NewClass1o.function.__module__)
+
+    def test_instance_module_name(self):
+       # Test preservation of instance method __module__ attribute.
+
+        self.assertEqual(NewClass1d().function.__module__,
+                NewClass1o().function.__module__)
+
+    def test_class_doc_string(self):
+        # Test preservation of instance method __doc__ attribute.
+
+        self.assertEqual(NewClass1d.function.__doc__,
+                NewClass1o.function.__doc__)
+
+    def test_instance_doc_string(self):
+        # Test preservation of instance method __doc__ attribute.
+
+        self.assertEqual(NewClass1d().function.__doc__,
+                NewClass1o().function.__doc__)
+
+    def test_class_argspec(self):
+        # Test preservation of instance method argument specification.
+
+        original_argspec = inspect.getargspec(NewClass1o.function)
+        function_argspec = inspect.getargspec(NewClass1d.function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_instance_argspec(self):
+        # Test preservation of instance method argument specification.
+
+        original_argspec = inspect.getargspec(NewClass1o().function)
+        function_argspec = inspect.getargspec(NewClass1d().function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_class_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(NewClass1d.function,
+                type(NewClass1o.function)))
+
+    def test_instance_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(NewClass1d().function,
+                type(NewClass1o().function)))
+
+class TestCallingInstanceMethodOldStyle(unittest.TestCase):
+
+    def test_class_call_function(self):
+        # Test calling instancemethod via class and passing in the class
+        # instance directly. This is bypassing the descriptor protocol.
+
+        _args = (1, 2)
+        _kwargs = { 'one': 1, 'two': 2 }
+
+        @wrapt.instancemethod_decorator
+        def _decorator(wrapped, obj, cls, args, kwargs):
+            print('_DECORATOR', wrapped, obj, cls, args, kwargs)
+            self.assertNotEqual(obj, None)
+            return wrapped(*args, **kwargs)
+
+        @_decorator
+        def _function(*args, **kwargs):
+            return args, kwargs
+
+        class Class():
+            @_decorator
+            def _function(self, *args, **kwargs):
+                return (args, kwargs)
+
+        result = Class._function(Class(), *_args, **_kwargs)
+
+        self.assertEqual(result, (_args, _kwargs))
+
+    def test_instance_call_function(self):
+        # Test calling instancemethod via class instance.
+
+        _args = (1, 2)
+        _kwargs = { 'one': 1, 'two': 2 }
+
+        @wrapt.instancemethod_decorator
+        def _decorator(wrapped, obj, cls, args, kwargs):
+            self.assertNotEqual(obj, None)
+            return wrapped(*args, **kwargs)
+
+        @_decorator
+        def _function(*args, **kwargs):
+            return args, kwargs
+
+        class Class():
+            @_decorator
+            def _function(self, *args, **kwargs):
+                return (args, kwargs)
+
+        result = Class()._function(*_args, **_kwargs)
+
+        self.assertEqual(result, (_args, _kwargs))
+
+class TestCallingInstanceMethodNewStyle(unittest.TestCase):
+
+    def test_class_call_function(self):
+        # Test calling instancemethod via class and passing in the class
+        # instance directly. This is bypassing the descriptor protocol.
+
+        _args = (1, 2)
+        _kwargs = { 'one': 1, 'two': 2 }
+
+        @wrapt.instancemethod_decorator
+        def _decorator(wrapped, obj, cls, args, kwargs):
+            print('_DECORATOR', wrapped, obj, cls, args, kwargs)
+            self.assertNotEqual(obj, None)
+            return wrapped(*args, **kwargs)
+
+        @_decorator
+        def _function(*args, **kwargs):
+            return args, kwargs
+
+        class Class(object):
+            @_decorator
+            def _function(self, *args, **kwargs):
+                return (args, kwargs)
+
+        result = Class._function(Class(), *_args, **_kwargs)
+
+        self.assertEqual(result, (_args, _kwargs))
+
+    def test_instance_call_function(self):
+        # Test calling instancemethod via class instance.
+
+        _args = (1, 2)
+        _kwargs = { 'one': 1, 'two': 2 }
+
+        @wrapt.instancemethod_decorator
+        def _decorator(wrapped, obj, cls, args, kwargs):
+            self.assertNotEqual(obj, None)
+            return wrapped(*args, **kwargs)
+
+        @_decorator
+        def _function(*args, **kwargs):
+            return args, kwargs
+
+        class Class(object):
+            @_decorator
+            def _function(self, *args, **kwargs):
+                return (args, kwargs)
+
+        result = Class()._function(*_args, **_kwargs)
+
+        self.assertEqual(result, (_args, _kwargs))

wrapt/tests/test_nested_function.py

@@ -0,0 +1,60 @@
+from __future__ import print_function
+
+import unittest
+import inspect
+
+from .decorators import passthru_function_decorator
+
+def function():
+    def inner(arg):
+        '''documentation'''
+        return arg
+    return inner
+
+original = function
+
+def function():
+    @passthru_function_decorator
+    def inner(arg):
+        '''documentation'''
+        return arg
+    return inner
+
+class TestCase(unittest.TestCase):
+
+    def test_object_name(self):
+        # Test preservation of function __name__ attribute.
+
+        self.assertEqual(function().__name__, original().__name__)
+
+    def test_object_qualname(self):
+        # Test preservation of function __qualname__ attribute.
+
+        try:
+            __qualname__ = original().__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(function().__qualname__, __qualname__)
+
+    def test_module_name(self):
+       # Test preservation of function __module__ attribute.
+
+        self.assertEqual(function().__module__, __name__)
+
+    def test_doc_string(self):
+        # Test preservation of function __doc__ attribute.
+
+        self.assertEqual(function().__doc__, original().__doc__)
+
+    def test_argspec(self):
+        # Test preservation of function argument specification.
+
+        original_argspec = inspect.getargspec(original())
+        function_argspec = inspect.getargspec(function())
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(function(), type(original())))

wrapt/tests/test_outer_classmethod.py

@@ -0,0 +1,105 @@
+from __future__ import print_function
+
+import unittest
+import inspect
+
+from .decorators import passthru_generic_decorator
+
+class Class(object):
+    @classmethod
+    def function(self, arg):
+        '''documentation'''
+        return arg
+
+Original = Class
+
+class Class(object):
+    @classmethod
+    @passthru_generic_decorator
+    def function(self, arg):
+        '''documentation'''
+        return arg
+
+class TestCase(unittest.TestCase):
+
+    def test_class_object_name(self):
+        # Test preservation of instance method __name__ attribute.
+
+        self.assertEqual(Class.function.__name__,
+                Original.function.__name__)
+
+    def test_instance_object_name(self):
+        # Test preservation of instance method __name__ attribute.
+
+        self.assertEqual(Class().function.__name__,
+                Original().function.__name__)
+
+    def test_class_object_qualname(self):
+        # Test preservation of instance method __qualname__ attribute.
+
+        try:
+            __qualname__ = Original.original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(Class.function.__qualname__, __qualname__)
+
+    def test_instance_object_qualname(self):
+        # Test preservation of instance method __qualname__ attribute.
+
+        try:
+            __qualname__ = Original().original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(Class().function.__qualname__, __qualname__)
+
+    def test_class_module_name(self):
+       # Test preservation of instance method __module__ attribute.
+
+        self.assertEqual(Class.function.__module__,
+                Original.function.__module__)
+
+    def test_instance_module_name(self):
+       # Test preservation of instance method __module__ attribute.
+
+        self.assertEqual(Class().function.__module__,
+                Original().function.__module__)
+
+    def test_class_doc_string(self):
+        # Test preservation of instance method __doc__ attribute.
+
+        self.assertEqual(Class.function.__doc__,
+                Original.function.__doc__)
+
+    def test_instance_doc_string(self):
+        # Test preservation of instance method __doc__ attribute.
+
+        self.assertEqual(Class().function.__doc__,
+                Original().function.__doc__)
+
+    def test_class_argspec(self):
+        # Test preservation of instance method argument specification.
+
+        original_argspec = inspect.getargspec(Original.function)
+        function_argspec = inspect.getargspec(Class.function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_instance_argspec(self):
+        # Test preservation of instance method argument specification.
+
+        original_argspec = inspect.getargspec(Original().function)
+        function_argspec = inspect.getargspec(Class().function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_class_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(Class.function,
+                type(Original.function)))
+
+    def test_instance_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(Class().function,
+                type(Original().function)))

wrapt/tests/test_outer_staticmethod.py

@@ -0,0 +1,105 @@
+from __future__ import print_function
+
+import unittest
+import inspect
+
+from .decorators import passthru_generic_decorator
+
+class Class(object):
+    @staticmethod
+    def function(self, arg):
+        '''documentation'''
+        return arg
+
+Original = Class
+
+class Class(object):
+    @staticmethod
+    @passthru_generic_decorator
+    def function(self, arg):
+        '''documentation'''
+        return arg
+
+class TestCase(unittest.TestCase):
+
+    def test_class_object_name(self):
+        # Test preservation of instance method __name__ attribute.
+
+        self.assertEqual(Class.function.__name__,
+                Original.function.__name__)
+
+    def test_instance_object_name(self):
+        # Test preservation of instance method __name__ attribute.
+
+        self.assertEqual(Class().function.__name__,
+                Original().function.__name__)
+
+    def test_class_object_qualname(self):
+        # Test preservation of instance method __qualname__ attribute.
+
+        try:
+            __qualname__ = Original.original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(Class.function.__qualname__, __qualname__)
+
+    def test_instance_object_qualname(self):
+        # Test preservation of instance method __qualname__ attribute.
+
+        try:
+            __qualname__ = Original().original.__qualname__
+        except AttributeError:
+            pass
+        else:
+            self.assertEqual(Class().function.__qualname__, __qualname__)
+
+    def test_class_module_name(self):
+       # Test preservation of instance method __module__ attribute.
+
+        self.assertEqual(Class.function.__module__,
+                Original.function.__module__)
+
+    def test_instance_module_name(self):
+       # Test preservation of instance method __module__ attribute.
+
+        self.assertEqual(Class().function.__module__,
+                Original().function.__module__)
+
+    def test_class_doc_string(self):
+        # Test preservation of instance method __doc__ attribute.
+
+        self.assertEqual(Class.function.__doc__,
+                Original.function.__doc__)
+
+    def test_instance_doc_string(self):
+        # Test preservation of instance method __doc__ attribute.
+
+        self.assertEqual(Class().function.__doc__,
+                Original().function.__doc__)
+
+    def test_class_argspec(self):
+        # Test preservation of instance method argument specification.
+
+        original_argspec = inspect.getargspec(Original.function)
+        function_argspec = inspect.getargspec(Class.function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_instance_argspec(self):
+        # Test preservation of instance method argument specification.
+
+        original_argspec = inspect.getargspec(Original().function)
+        function_argspec = inspect.getargspec(Class().function)
+        self.assertEqual(original_argspec, function_argspec)
+
+    def test_class_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(Class.function,
+                type(Original.function)))
+
+    def test_instance_isinstance(self):
+        # Test preservation of isinstance() checks.
+
+        self.assertTrue(isinstance(Class().function,
+                type(Original().function)))

wrapt/wrappers.py

@@ -0,0 +1,214 @@
+import functools
+
+from . import six
+
+class WrapperOverrideMethods(object):
+
+    @property
+    def __module__(self):
+        return self._self_wrapped.__module__
+
+    @__module__.setter
+    def __module__(self, value):
+        self._self_wrapped.__module__ = value
+
+    @property
+    def __doc__(self):
+        return self._self_wrapped.__doc__
+
+    @__doc__.setter
+    def __doc__(self, value):
+        self._self_wrapped.__doc__ = value
+
+class WrapperBaseMetaType(type):
+     def __new__(cls, name, bases, dictionary):
+         # We use properties to override the values of __module__ and
+         # __doc__. If we add these in WrapperBase, the derived class
+         # __dict__ will still be setup to have string variants of these
+         # attributes and the rules of descriptors means that they
+         # appear to take precedence over the properties in the base
+         # class. To avoid that, we copy the properties into the derived
+         # class type itself via a meta class. In that way the
+         # properties will always take precedence.
+
+         dictionary.update(vars(WrapperOverrideMethods))
+         return type.__new__(cls, name, bases, dictionary)
+
+class WrapperBase(six.with_metaclass(WrapperBaseMetaType)):
+
+    def __init__(self, wrapped, wrapper, adapter=None, params={}):
+        self._self_wrapped = wrapped
+        self._self_wrapper = wrapper
+        self._self_params = params
+
+        # Python 3.2+ has the __wrapped__ attribute which is meant to
+        # hold a reference to the inner most wrapped object when there
+        # are multiple decorators. We handle __wrapped__ and also
+        # duplicate that functionality for Python 2, although it will
+        # only go as far as what is below our own wrappers when there is
+        # more than one for Python 2.
+
+        if adapter is None:
+            try:
+                self._self_target = wrapped.__wrapped__
+            except AttributeError:
+                self._self_target = wrapped
+        else:
+            self._self_target = adapter
+
+        # Python 3.2+ has the __qualname__ attribute, but it does not
+        # allow it to be overridden using a property and it must instead
+        # be an actual string object instead.
+
+        try:
+            object.__setattr__(self, '__qualname__', wrapped.__qualname__)
+        except AttributeError:
+            pass
+
+        # Although __name__ can be overridden with a property in all
+        # Python versions, updating it writes it back to an internal C
+        # structure which can be accessed at C code level, so not sure
+        # if overriding it as a property is sufficient in all cases.
+
+        try:
+            object.__setattr__(self, '__name__', wrapped.__name__)
+        except AttributeError:
+            pass
+
+    def __setattr__(self, name, value):
+        if name.startswith('_self_'):
+            object.__setattr__(self, name, value)
+        else:
+            setattr(self._self_wrapped, name, value)
+
+    def __getattr__(self, name):
+        return getattr(self._self_wrapped, name)
+
+    @property
+    def __class__(self):
+        return self._self_wrapped.__class__
+
+    @__class__.setter
+    def __class__(self, value):
+        self._self_wrapped.__class__ = value
+
+    @property
+    def __annotations__(self):
+        return self._self_wrapped.__anotations__
+
+    @__annotations__.setter
+    def __annotations__(self, value):
+        self._self_wrapped.__annotations__ = value
+
+    @property
+    def __wrapped__(self):
+        return self._self_target
+
+    @__wrapped__.setter
+    def __wrapped__(self, value):
+        self._self_wrapped.__wrapped__ = value
+
+    def __dir__(self):
+        return dir(self._self_wrapped)
+
+    def __eq__(self, other):
+        return self._self_target == other
+
+    def __ne__(self, other):
+        result = self.__eq__(other)
+        if result is NotImplemented:
+            return result
+        return not result
+
+    def __hash__(self):
+        return hash(self._self_target)
+
+    def __repr__(self):
+        return '<%s for %s>' % (type(self).__name__, str(self._self_target))
+
+    def __enter__(self):
+        return self._self_wrapped.__enter__()
+
+    def __exit__(self, *args, **kwargs):
+        return self._self_wrapped.__exit__(*args, **kwargs)
+
+    def __iter__(self):
+        return iter(self._self_wrapped)
+
+class BoundGenericWrapper(WrapperBase):
+
+    def __init__(self, wrapped, instance, owner, wrapper, adapter=None,
+            params={}):
+        self._self_instance = instance
+        self._self_owner = owner
+        super(BoundGenericWrapper, self).__init__(wrapped=wrapped,
+                wrapper=wrapper, adapter=adapter, params=params)
+
+    def __call__(self, *args, **kwargs):
+        return self._self_wrapper(self._self_wrapped, self._self_instance,
+                self._self_owner, args, kwargs, **self._self_params)
+
+class GenericWrapper(WrapperBase):
+
+    WRAPPER_ARGLIST = ('wrapped', 'instance', 'owner', 'args', 'kwargs')
+
+    def __get__(self, instance, owner):
+        descriptor = self._self_wrapped.__get__(instance, owner)
+        return BoundGenericWrapper(wrapped=descriptor, instance=instance,
+                owner=owner, wrapper=self._self_wrapper,
+                adapter=self._self_target, params=self._self_params)
+        return result
+
+    def __call__(self, *args, **kwargs):
+        return self._self_wrapper(self._self_wrapped, None, None,
+                args, kwargs, **self._self_params)
+
+class FunctionWrapper(WrapperBase):
+
+    WRAPPER_ARGLIST = ('wrapped', 'args', 'kwargs')
+
+    def __call__(self, *args, **kwargs):
+        return self._self_wrapper(self._self_wrapped, args, kwargs,
+                **self._self_params)
+
+class BoundInstanceMethodWrapper(WrapperBase):
+
+    def __init__(self, wrapped, instance, owner, wrapper, adapter=None,
+            params={}):
+        self._self_instance = instance
+        self._self_owner = owner
+        super(BoundInstanceMethodWrapper, self).__init__(wrapped=wrapped,
+                wrapper=wrapper, adapter=adapter, params=params)
+
+    def __call__(self, *args, **kwargs):
+        if self._self_instance is None:
+            # This situation can occur where someone is calling the
+            # instancemethod via the class type and passing the instance
+            # as the first argument. This technically is breaking the
+            # descriptor protocol and could cause problems where the
+            # decorator was wrapping another decorator which in turn was
+            # relying on the descriptor protocol to be able to derive
+            # the instance and is not using a similar workaround to
+            # this. We can only ensure we ourselves at least ensure our
+            # wrappers/decorators work and just pass the problem on to
+            # the next wrapper/decorator.
+
+            instance, args = args[0], args[1:]
+            wrapped = functools.partial(self._self_wrapped, instance)
+            return self._self_wrapper(wrapped, instance, self._self_owner,
+                    args, kwargs, **self._self_params)
+
+        else:
+            return self._self_wrapper(self._self_wrapped, self._self_instance,
+                    self._self_owner, args, kwargs, **self._self_params)
+
+class InstanceMethodWrapper(WrapperBase):
+
+    WRAPPER_ARGLIST = ('wrapped', 'instance', 'owner', 'args', 'kwargs')
+
+    def __get__(self, instance, owner):
+        descriptor = self._self_wrapped.__get__(instance, owner)
+        return BoundInstanceMethodWrapper(wrapped=descriptor,
+                instance=instance, owner=owner, wrapper=self._self_wrapper,
+                adapter=self._self_target, params=self._self_params)
+        return result