Python types.new_class函数代码示例

def _copy_module(module, include=None, exclude=None):
    copied = types.ModuleType(module.__name__)
    copied.__package__ = getattr(module, "__package__", None)
    for name, value in module.__dict__.items():
        if (name.startswith("_") or (exclude is not None and name in exclude) or
                (include is not None and name not in include)):
            continue
        type_ = type(value)
        if value is None or type_ in (bool, bytes, float, int, str):
            setattr(copied, name, value)
        elif type_ in (types.FunctionType, types.LambdaType,
                       types.BuiltinFunctionType):
            def func_proxy(func):
                """Return a proxy for the given function."""
                # pylint: disable=unnecessary-lambda
                return lambda *args, **kwargs: func(*args, **kwargs)
            setattr(copied, name, func_proxy(value))
        elif type_ is type and value is not type:
            try:
                proxy = types.new_class(name, bases=(value,))
                proxy.mro = lambda: []
                setattr(copied, name, types.new_class(name, bases=(proxy,)))
            except TypeError:
                pass
    return copied

    def test_errors(self):
        class MyMeta(type):
            pass

        with self.assertRaises(TypeError):
            class MyClass(metaclass=MyMeta, otherarg=1):
                pass

        with self.assertRaises(TypeError):
            types.new_class("MyClass", (object,),
                            dict(metaclass=MyMeta, otherarg=1))
        types.prepare_class("MyClass", (object,),
                            dict(metaclass=MyMeta, otherarg=1))

        class MyMeta(type):
            def __init__(self, name, bases, namespace, otherarg):
                super().__init__(name, bases, namespace)

        with self.assertRaises(TypeError):
            class MyClass(metaclass=MyMeta, otherarg=1):
                pass

        class MyMeta(type):
            def __new__(cls, name, bases, namespace, otherarg):
                return super().__new__(cls, name, bases, namespace)

            def __init__(self, name, bases, namespace, otherarg):
                super().__init__(name, bases, namespace)
                self.otherarg = otherarg

        class MyClass(metaclass=MyMeta, otherarg=1):
            pass

        self.assertEqual(MyClass.otherarg, 1)

def test_both(test_class, **kwargs):
    frozen_tests = types.new_class('Frozen_'+test_class.__name__,
                                   (test_class, unittest.TestCase))
    source_tests = types.new_class('Source_'+test_class.__name__,
                                   (test_class, unittest.TestCase))
    frozen_tests.__module__ = source_tests.__module__ = test_class.__module__
    for attr, (frozen_value, source_value) in kwargs.items():
        setattr(frozen_tests, attr, frozen_value)
        setattr(source_tests, attr, source_value)
    return frozen_tests, source_tests

    def extension_add_event(self, code, evt, name = None):
        """extension_add_event(code, evt, [name])

        Add an extension event.  CODE is the numeric code, and EVT is
        the event class.  EVT will be cloned, and the attribute _code
        of the new event class will be set to CODE.

        If NAME is omitted, it will be set to the name of EVT.  This
        name is used to insert an entry in the DictWrapper
        extension_event.
        """

        if hasattr(types, 'ClassType'):
            newevt = types.ClassType(evt.__name__, evt.__bases__,
                                     evt.__dict__.copy())
        else:
            newevt = types.new_class(evt.__name__, evt.__bases__,
                                     evt.__dict__.copy())
        newevt._code = code

        self.display.add_extension_event(code, newevt)

        if name is None:
            name = evt.__name__

        setattr(self.extension_event, name, code)

    def extension_add_subevent(self, code, subcode, evt, name = None):
        """extension_add_subevent(code, evt, [name])

        Add an extension subevent.  CODE is the numeric code, subcode
        is the sub-ID of this event that shares the code ID with other
        sub-events and EVT is the event class.  EVT will be cloned, and
        the attribute _code of the new event class will be set to CODE.

        If NAME is omitted, it will be set to the name of EVT.  This
        name is used to insert an entry in the DictWrapper
        extension_event.
        """

        if hasattr(types, 'ClassType'):
            newevt = types.ClassType(evt.__name__, evt.__bases__,
                                     evt.__dict__.copy())
        else:
            newevt = types.new_class(evt.__name__, evt.__bases__,
                                     evt.__dict__.copy())
        newevt._code = code

        self.display.add_extension_event(code, newevt, subcode)

        if name is None:
            name = evt.__name__

        # store subcodes as a tuple of (event code, subcode) in the
        # extension dict maintained in the display object
        setattr(self.extension_event, name, (code,subcode))

    def data_entry_form(self, row_name='new', data_instance = None, depth = 2):
        self.form_class = None
        self.classattr = {}

        if data_instance is None:
            data_instance = DataInstance(self.table_name, row_name, depth)

            if row_name != 'new':
                data_instance.get_linked_instances()

        self.instance = data_instance

        self.get_table(data_instance)

        self.classattr['form_data_type_0'] = HiddenField('form_data_type_0', default=self.form_type)
        self.classattr['form_data_table_0'] = HiddenField('form_data_table_0', default=self.table_name)
        self.classattr['form_data_row_name_0'] = HiddenField('form_data_row_name_0', default=row_name)
        self.classattr['row_counter'] = HiddenField('row_counter', default=data_instance.instance_counter)

        form_class = new_class('SingleForm', (Form,), {}, lambda ns: ns.update(self.classattr))

        logging.info(self.classattr)
        logging.info(self.classattr)

        self.form_class = form_class(None)

def make_abc_subclasses(base_class):
    classes = []
    for kind, abc in [('Frozen', frozen_abc), ('Source', source_abc)]:
        name = '_'.join([kind, base_class.__name__])
        base_classes = base_class, getattr(abc, base_class.__name__)
        classes.append(types.new_class(name, base_classes))
    return classes

    def test_metaclass_override_function(self):
        # Special case: the given metaclass isn't a class,
        # so there is no metaclass calculation.
        class A(metaclass=self.Meta):
            pass

        marker = object()
        def func(*args, **kwargs):
            return marker

        X = types.new_class("X", (), {"metaclass": func})
        Y = types.new_class("Y", (object,), {"metaclass": func})
        Z = types.new_class("Z", (A,), {"metaclass": func})
        self.assertIs(marker, X)
        self.assertIs(marker, Y)
        self.assertIs(marker, Z)

 def ensure_tomes(self):
     for number in range(1, 29):
         class_id = 'Tome_{0:02d}'.format(number)
         self.tomes[number] = types.new_class(
             correct_owl_id(class_id),
             (Tome, ),
             kwds = { "ontology" : onto }
         )

 def test_new_class_metaclass_keywords(self):
     #Test that keywords are passed to the metaclass:
     def meta_func(name, bases, ns, **kw):
         return name, bases, ns, kw
     res = types.new_class("X",
                           (int, object),
                           dict(metaclass=meta_func, x=0))
     self.assertEqual(res, ("X", (int, object), {}, {"x": 0}))

 def test_new_class_meta(self):
     Meta = self.Meta
     settings = {"metaclass": Meta, "z": 2}
     # We do this twice to make sure the passed in dict isn't mutated
     for i in range(2):
         C = types.new_class("C" + str(i), (), settings)
         self.assertIsInstance(C, Meta)
         self.assertEqual(C.y, 1)
         self.assertEqual(C.z, 2)

    def decorator(cls):
        assert isinstance(driver, Driver)
        assert issubclass(cls, Schema)
        assert not issubclass(cls, DrivedMixin)

        drived_class = new_class(cls.__name__, (cls, DrivedMixin))
        drived_class.driver = driver

        return drived_class

 def test_new_class_exec_body(self):
     Meta = self.Meta
     def func(ns):
         ns["x"] = 0
     C = types.new_class("C", (), {"metaclass": Meta, "z": 2}, func)
     self.assertIsInstance(C, Meta)
     self.assertEqual(C.x, 0)
     self.assertEqual(C.y, 1)
     self.assertEqual(C.z, 2)

    def test_prepare_class(self):
        # Basic test of metaclass derivation
        expected_ns = {}
        class A(type):
            def __new__(*args, **kwargs):
                return type.__new__(*args, **kwargs)

            def __prepare__(*args):
                return expected_ns

        B = types.new_class("B", (object,))
        C = types.new_class("C", (object,), {"metaclass": A})

        # The most derived metaclass of D is A rather than type.
        meta, ns, kwds = types.prepare_class("D", (B, C), {"metaclass": type})
        self.assertIs(meta, A)
        self.assertIs(ns, expected_ns)
        self.assertEqual(len(kwds), 0)

def make_return_value_tests(base_class, test_class):
    frozen_class, source_class = make_abc_subclasses(base_class)
    tests = []
    for prefix, class_in_test in [('Frozen', frozen_class), ('Source', source_class)]:
        def set_ns(ns):
            ns['ins'] = class_in_test()
        tests.append(types.new_class('_'.join([prefix, test_class.__name__]),
                                     (test_class, unittest.TestCase),
                                     exec_body=set_ns))
    return tests