Python twisted.python.reflect.namedAny() Examples

def filenameToModule(fn):
    if not os.path.exists(fn):
        raise ValueError("%r doesn't exist" % (fn,))
    try:
        ret = reflect.namedAny(reflect.filenameToModuleName(fn))
    except (ValueError, AttributeError):
        # Couldn't find module.  The file 'fn' is not in PYTHONPATH
        return _importFromFile(fn)
    # ensure that the loaded module matches the file
    retFile = os.path.splitext(ret.__file__)[0] + '.py'
    # not all platforms (e.g. win32) have os.path.samefile
    same = getattr(os.path, 'samefile', samefile)
    if os.path.isfile(fn) and not same(fn, retFile):
        del sys.modules[ret.__name__]
        ret = _importFromFile(fn)
    return ret 

def _unpickleFunction(fullyQualifiedName):
    """
    Convert a function name into a function by importing it.

    This is a synonym for L{twisted.python.reflect.namedAny}, but imported
    locally to avoid circular imports, and also to provide a persistent name
    that can be stored (and deprecated) independently of C{namedAny}.

    @param fullyQualifiedName: The fully qualified name of a function.
    @type fullyQualifiedName: native C{str}

    @return: A function object imported from the given location.
    @rtype: L{types.FunctionType}
    """
    from twisted.python.reflect import namedAny
    return namedAny(fullyQualifiedName) 

def makeTestCaseClasses(cls):
        """
        Create a L{SynchronousTestCase} subclass which mixes in C{cls} for each
        known reactor and return a dict mapping their names to them.
        """
        classes = {}
        for reactor in cls._reactors:
            shortReactorName = reactor.split(".")[-1]
            name = (cls.__name__ + "." + shortReactorName + "Tests").replace(".", "_")
            class testcase(cls, SynchronousTestCase):
                __module__ = cls.__module__
                if reactor in cls.skippedReactors:
                    skip = cls.skippedReactors[reactor]
                try:
                    reactorFactory = namedAny(reactor)
                except:
                    skip = Failure().getErrorMessage()
            testcase.__name__ = name
            if hasattr(cls, "__qualname__"):
                testcase.__qualname__ = ".".join(cls.__qualname__.split()[0:-1] + [name])
            classes[testcase.__name__] = testcase
        return classes 

def test_attributeExceptions(self):
        """
        If segments on the end of a fully-qualified Python name represents
        attributes which aren't actually present on the object represented by
        the earlier segments, L{namedAny} should raise an L{AttributeError}.
        """
        self.assertRaises(
            AttributeError,
            reflect.namedAny, "twisted.nosuchmoduleintheworld")
        # ImportError behaves somewhat differently between "import
        # extant.nonextant" and "import extant.nonextant.nonextant", so test
        # the latter as well.
        self.assertRaises(
            AttributeError,
            reflect.namedAny, "twisted.nosuch.modulein.theworld")
        self.assertRaises(
            AttributeError,
            reflect.namedAny,
            "twisted.test.test_reflect.Summer.nosuchattribute") 

def test_loadPackagesAndModules(self):
        """
        Verify that we can locate and load packages, modules, submodules, and
        subpackages.
        """
        for n in ['os',
                  'twisted',
                  'twisted.python',
                  'twisted.python.reflect']:
            m = namedAny(n)
            self.failUnlessIdentical(
                modules.getModule(n).load(),
                m)
            self.failUnlessIdentical(
                self.findByIteration(n).load(),
                m) 

def makeTestCaseClasses(cls):
        """
        Create a L{SynchronousTestCase} subclass which mixes in C{cls} for each
        known reactor and return a dict mapping their names to them.
        """
        classes = {}
        for reactor in cls._reactors:
            shortReactorName = reactor.split(".")[-1]
            name = (cls.__name__ + "." + shortReactorName + "Tests").replace(".", "_")
            class testcase(cls, SynchronousTestCase):
                __module__ = cls.__module__
                if reactor in cls.skippedReactors:
                    skip = cls.skippedReactors[reactor]
                try:
                    reactorFactory = namedAny(reactor)
                except:
                    skip = Failure().getErrorMessage()
            testcase.__name__ = name
            if hasattr(cls, "__qualname__"):
                testcase.__qualname__ = ".".join(cls.__qualname__.split()[0:-1] + [name])
            classes[testcase.__name__] = testcase
        return classes 

def _unpickleFunction(fullyQualifiedName):
    """
    Convert a function name into a function by importing it.

    This is a synonym for L{twisted.python.reflect.namedAny}, but imported
    locally to avoid circular imports, and also to provide a persistent name
    that can be stored (and deprecated) independently of C{namedAny}.

    @param fullyQualifiedName: The fully qualified name of a function.
    @type fullyQualifiedName: native C{str}

    @return: A function object imported from the given location.
    @rtype: L{types.FunctionType}
    """
    from twisted.python.reflect import namedAny
    return namedAny(fullyQualifiedName) 

def test_attributeExceptions(self):
        """
        If segments on the end of a fully-qualified Python name represents
        attributes which aren't actually present on the object represented by
        the earlier segments, L{namedAny} should raise an L{AttributeError}.
        """
        self.assertRaises(
            AttributeError,
            reflect.namedAny, "twisted.nosuchmoduleintheworld")
        # ImportError behaves somewhat differently between "import
        # extant.nonextant" and "import extant.nonextant.nonextant", so test
        # the latter as well.
        self.assertRaises(
            AttributeError,
            reflect.namedAny, "twisted.nosuch.modulein.theworld")
        self.assertRaises(
            AttributeError,
            reflect.namedAny,
            "twisted.test.test_reflect.Summer.nosuchattribute") 

def test_loadPackagesAndModules(self):
        """
        Verify that we can locate and load packages, modules, submodules, and
        subpackages.
        """
        for n in ['os',
                  'twisted',
                  'twisted.python',
                  'twisted.python.reflect']:
            m = namedAny(n)
            self.failUnlessIdentical(
                modules.getModule(n).load(),
                m)
            self.failUnlessIdentical(
                self.findByIteration(n).load(),
                m) 

def makeTestCaseClasses(cls):
        """
        Create a L{TestCase} subclass which mixes in C{cls} for each known
        reactor and return a dict mapping their names to them.
        """
        classes = {}
        for reactor in cls._reactors:
            shortReactorName = reactor.split(".")[-1]
            name = (cls.__name__ + "." + shortReactorName).replace(".", "_")
            class testcase(cls, TestCase):
                __module__ = cls.__module__
                if reactor in cls.skippedReactors:
                    skip = cls.skippedReactors[reactor]
                try:
                    reactorFactory = namedAny(reactor)
                except:
                    skip = Failure().getErrorMessage()
            testcase.__name__ = name
            classes[testcase.__name__] = testcase
        return classes 

def test_importExceptions(self):
        """
        Exceptions raised by modules which L{namedAny} causes to be imported
        should pass through L{namedAny} to the caller.
        """
        self.assertRaises(
            ZeroDivisionError,
            reflect.namedAny, "twisted.test.reflect_helper_ZDE")
        # Make sure that this behavior is *consistent* for 2.3, where there is
        # no post-failed-import cleanup
        self.assertRaises(
            ZeroDivisionError,
            reflect.namedAny, "twisted.test.reflect_helper_ZDE")
        self.assertRaises(
            ValueError,
            reflect.namedAny, "twisted.test.reflect_helper_VE")
        # Modules which themselves raise ImportError when imported should result in an ImportError
        self.assertRaises(
            ImportError,
            reflect.namedAny, "twisted.test.reflect_helper_IE") 

def test_attributeExceptions(self):
        """
        If segments on the end of a fully-qualified Python name represents
        attributes which aren't actually present on the object represented by
        the earlier segments, L{namedAny} should raise an L{AttributeError}.
        """
        self.assertRaises(
            AttributeError,
            reflect.namedAny, "twisted.nosuchmoduleintheworld")
        # ImportError behaves somewhat differently between "import
        # extant.nonextant" and "import extant.nonextant.nonextant", so test
        # the latter as well.
        self.assertRaises(
            AttributeError,
            reflect.namedAny, "twisted.nosuch.modulein.theworld")
        self.assertRaises(
            AttributeError,
            reflect.namedAny, "twisted.python.reflect.Summer.nosuchattributeintheworld") 

def test_loadPackagesAndModules(self):
        """
        Verify that we can locate and load packages, modules, submodules, and
        subpackages.
        """
        for n in ['os',
                  'twisted',
                  'twisted.python',
                  'twisted.python.reflect']:
            m = namedAny(n)
            self.failUnlessIdentical(
                modules.getModule(n).load(),
                m)
            self.failUnlessIdentical(
                self.findByIteration(n).load(),
                m) 

def filenameToModule(fn):
    """
    Given a filename, do whatever possible to return a module object matching
    that file.

    If the file in question is a module in Python path, properly import and
    return that module. Otherwise, load the source manually.

    @param fn: A filename.
    @return: A module object.
    @raise ValueError: If C{fn} does not exist.
    """
    if not os.path.exists(fn):
        raise ValueError("%r doesn't exist" % (fn,))
    try:
        ret = reflect.namedAny(reflect.filenameToModuleName(fn))
    except (ValueError, AttributeError):
        # Couldn't find module.  The file 'fn' is not in PYTHONPATH
        return _importFromFile(fn)

    if not hasattr(ret, "__file__"):
        # This isn't a Python module in a package, so import it from a file
        return _importFromFile(fn)

    # ensure that the loaded module matches the file
    retFile = os.path.splitext(ret.__file__)[0] + '.py'
    # not all platforms (e.g. win32) have os.path.samefile
    same = getattr(os.path, 'samefile', samefile)
    if os.path.isfile(fn) and not same(fn, retFile):
        del sys.modules[ret.__name__]
        ret = _importFromFile(fn)
    return ret 

def test_namedAnySecondAttributeLookup(self):
        """
        L{namedAny} should return the object an attribute of an object which
        itself was an attribute of a non-module, non-package object is bound to
        for the name it is passed.
        """
        self.assertIdentical(
            reflect.namedAny(
                "twisted.python.reflect.Summer.reallySet.__doc__"),
            reflect.Summer.reallySet.__doc__) 

def test_namedAnyAttributeLookup(self):
        """
        L{namedAny} should return the object an attribute of a non-module,
        non-package object is bound to for the name it is passed.
        """
        # Note - not assertEqual because unbound method lookup creates a new
        # object every time.  This is a foolishness of Python's object
        # implementation, not a bug in Twisted.
        self.assertEqual(
            reflect.namedAny("twisted.python.reflect.Summer.reallySet"),
            reflect.Summer.reallySet) 

def test_namedAnyModuleLookup(self):
        """
        L{namedAny} should return the module object for the name it is passed.
        """
        self.assertIdentical(
            reflect.namedAny("twisted.python.reflect"), reflect) 

def test_namedAnyPackageLookup(self):
        """
        L{namedAny} should return the package object for the name it is passed.
        """
        import twisted.python
        self.assertIdentical(
            reflect.namedAny("twisted.python"), twisted.python) 

def testClassLookup(self):
        self.failUnlessIdentical(reflect.namedAny("twisted.python."
                                                  "reflect.Summer"),
                                 reflect.Summer) 

def load(self):
        return namedAny(self.dropin.moduleName + '.' + self.name) 

def loadDoctests(self, module):
        """
        Return a suite of tests for all the doctests defined in C{module}.

        @param module: A module object or a module name.
        """
        if isinstance(module, str):
            try:
                module = reflect.namedAny(module)
            except:
                return ErrorHolder(module, failure.Failure())
        if not inspect.ismodule(module):
            warnings.warn("trial only supports doctesting modules")
            return
        extraArgs = {}
        if sys.version_info > (2, 4):
            # Work around Python issue2604: DocTestCase.tearDown clobbers globs
            def saveGlobals(test):
                """
                Save C{test.globs} and replace it with a copy so that if
                necessary, the original will be available for the next test
                run.
                """
                test._savedGlobals = getattr(test, '_savedGlobals', test.globs)
                test.globs = test._savedGlobals.copy()
            extraArgs['setUp'] = saveGlobals
        return doctest.DocTestSuite(module, **extraArgs) 

def filenameToModule(fn):
    """
    Given a filename, do whatever possible to return a module object matching
    that file.

    If the file in question is a module in Python path, properly import and
    return that module. Otherwise, load the source manually.

    @param fn: A filename.
    @return: A module object.
    @raise ValueError: If C{fn} does not exist.
    """
    if not os.path.exists(fn):
        raise ValueError("%r doesn't exist" % (fn,))
    try:
        ret = reflect.namedAny(reflect.filenameToModuleName(fn))
    except (ValueError, AttributeError):
        # Couldn't find module.  The file 'fn' is not in PYTHONPATH
        return _importFromFile(fn)
    # ensure that the loaded module matches the file
    retFile = os.path.splitext(ret.__file__)[0] + '.py'
    # not all platforms (e.g. win32) have os.path.samefile
    same = getattr(os.path, 'samefile', samefile)
    if os.path.isfile(fn) and not same(fn, retFile):
        del sys.modules[ret.__name__]
        ret = _importFromFile(fn)
    return ret 

def makeService():
        def get(self):
            return namedAny(self.module).makeService
        return get, 

def options():
        def get(self):
            return namedAny(self.module).Options
        return get, 

def loadDoctests(self, module):
        """
        Return a suite of tests for all the doctests defined in C{module}.

        @param module: A module object or a module name.
        """
        if isinstance(module, str):
            try:
                module = reflect.namedAny(module)
            except:
                return ErrorHolder(module, failure.Failure())
        if not inspect.ismodule(module):
            warnings.warn("trial only supports doctesting modules")
            return
        extraArgs = {}
        if sys.version_info > (2, 4):
            # Work around Python issue2604: DocTestCase.tearDown clobbers globs
            def saveGlobals(test):
                """
                Save C{test.globs} and replace it with a copy so that if
                necessary, the original will be available for the next test
                run.
                """
                test._savedGlobals = getattr(test, '_savedGlobals', test.globs)
                test.globs = test._savedGlobals.copy()
            extraArgs['setUp'] = saveGlobals
        return doctest.DocTestSuite(module, **extraArgs) 

def opt_wsgi(self, name):
        """
        The FQPN of a WSGI application object to serve as the root resource of
        the webserver.
        """
        pool = threadpool.ThreadPool()
        reactor.callWhenRunning(pool.start)
        reactor.addSystemEventTrigger('after', 'shutdown', pool.stop)
        try:
            application = reflect.namedAny(name)
        except (AttributeError, ValueError):
            raise usage.UsageError("No such WSGI application: %r" % (name,))
        self['root'] = wsgi.WSGIResource(reactor, pool, application) 

def _convertDistribution(cls, value):
        """
        Construct and return a new distribution object using the type and
        params specified by C{value}.
        """
        return namedAny(value['type'])(**value['params']) 

def pickleConfig(self, config, delegateTo):
        # from twistedcaldav.config import config as globalConfig
        # globalConfig._data = config._data
        swapAMP(self, namedAny(delegateTo)(config))
        return {} 

def createStore(self, delegateTo):
        """
        Create a store and pass it to the named delegate class.
        """
        swapAMP(self, namedAny(delegateTo)(SQLStoreBuilder.childStore()))
        return {} 

def makeService():
        def get(self):
            return namedAny(self.module).makeService
        return get,