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comparison mercurial/thirdparty/zope/interface/declarations.py @ 37179:49630e75635d

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thirdparty: allow zope.interface.advice to be lazily imported The symbol from this module is only used in functions. Let's access that symbol through its imported module so importing zope.interface.advice can be lazy. Differential Revision: https://phab.mercurial-scm.org/D2931
author Gregory Szorc <gregory.szorc@gmail.com>
date Wed, 21 Mar 2018 18:13:40 -0700
parents 68ee61822182
children b9dd8403d8ff
comparison
equal deleted inserted replaced
37178:68ee61822182 37179:49630e75635d
32 from types import FunctionType 32 from types import FunctionType
33 from types import MethodType 33 from types import MethodType
34 from types import ModuleType 34 from types import ModuleType
35 import weakref 35 import weakref
36 36
37 from .advice import addClassAdvisor 37 from . import advice as advicemod
38 from .interface import InterfaceClass 38 from .interface import InterfaceClass
39 from .interface import SpecificationBase 39 from .interface import SpecificationBase
40 from .interface import Specification 40 from .interface import Specification
41 from ._compat import CLASS_TYPES as DescriptorAwareMetaClasses 41 from ._compat import CLASS_TYPES as DescriptorAwareMetaClasses
42 from ._compat import PYTHON3 42 from ._compat import PYTHON3
449 449
450 if '__implements_advice_data__' in locals: 450 if '__implements_advice_data__' in locals:
451 raise TypeError(name+" can be used only once in a class definition.") 451 raise TypeError(name+" can be used only once in a class definition.")
452 452
453 locals['__implements_advice_data__'] = interfaces, classImplements 453 locals['__implements_advice_data__'] = interfaces, classImplements
454 addClassAdvisor(_implements_advice, depth=3) 454 advicemod.addClassAdvisor(_implements_advice, depth=3)
455 455
456 def implements(*interfaces): 456 def implements(*interfaces):
457 """Declare interfaces implemented by instances of a class 457 """Declare interfaces implemented by instances of a class
458 458
459 This function is called in a class definition. 459 This function is called in a class definition.
730 raise TypeError( 730 raise TypeError(
731 "classProvides can only be used once in a class definition.") 731 "classProvides can only be used once in a class definition.")
732 732
733 locals["__provides__"] = _normalizeargs(interfaces) 733 locals["__provides__"] = _normalizeargs(interfaces)
734 734
735 addClassAdvisor(_classProvides_advice, depth=2) 735 advicemod.addClassAdvisor(_classProvides_advice, depth=2)
736 736
737 def _classProvides_advice(cls): 737 def _classProvides_advice(cls):
738 # This entire approach is invalid under Py3K. Don't even try to fix 738 # This entire approach is invalid under Py3K. Don't even try to fix
739 # the coverage for this block there. :( 739 # the coverage for this block there. :(
740 interfaces = cls.__dict__['__provides__'] 740 interfaces = cls.__dict__['__provides__']