def __find_implementations():
"""Returns all the concrete subclasses of MetadataExtractor.
"""
implementations = {}
for implementation in all_subclasses(MetadataExtractor):
try:
implementations[implementation.feature_name()] = implementation
except NotImplementedError:
pass
return implementations
def __find_implementations():
"""Returns all the concrete subclasses of MetadataExtractor.
"""
implementations = {}
for implementation in all_subclasses(MetadataExtractor):
try:
implementations[implementation.feature_name()] = implementation
except NotImplementedError:
pass
return implementations
def test_all_subclasses(self):
class Root(object):
pass
class AB(Root):
pass
class ABC(AB):
pass
class AD(Root):
pass
class ABAD(AB, AD):
pass
class ABADE(ABAD):
pass
self.assertTrue(all_subclasses(Root), set([AB, ABC, AD, ABAD, ABADE]))
self.assertEqual(all_subclasses(ABADE), set())
def test_all_subclasses(self):
class Root(object):
pass
class AB(Root):
pass
class ABC(AB):
pass
class AD(Root):
pass
class ABAD(AB, AD):
pass
class ABADE(ABAD):
pass
self.assertTrue(all_subclasses(Root), set([AB, ABC, AD, ABAD, ABADE]))
self.assertTrue(all_subclasses(ABADE) == set())
def test_all_subclasses(self):
class Root(object):
pass
class AB(Root):
pass
class ABC(AB):
pass
class AD(Root):
pass
class ABAD(AB, AD):
pass
class ABADE(ABAD):
pass
self.assertItemsEqual(all_subclasses(Root), [AB, ABC, AD, ABAD, ABADE])
self.assertSetEqual(all_subclasses(ABADE), set())
def _implementations(cls):
"""Returns all the concrete subclasses of MetadataExtractor.
"""
if cls.__implementations:
return cls.__implementations
cls.__implementations = {}
for implementation in all_subclasses(MetadataExtractor):
try:
feature_name = implementation.feature_name()
cls.__implementations[feature_name] = implementation
except NotImplementedError:
pass
return cls.__implementations
def _implementations(cls):
"""Returns all the concrete subclasses of MetadataExtractor.
"""
if cls.__implementations:
return cls.__implementations
cls.__implementations = {}
for implementation in all_subclasses(MetadataExtractor):
try:
feature_name = implementation.feature_name()
cls.__implementations[feature_name] = implementation
except NotImplementedError:
pass
return cls.__implementations