__init__.py 文件源码

def optimizations(cls):
        """

        :return:
        """
        if not hasattr(cls, '_optimizations'):
            cls._optimizations = {}
            package = sys.modules[BasicOptimization.__module__]
            path = os.path.dirname(package.__file__)
            for loader, module_name, is_pkg in pkgutil.iter_modules([path]):
                if module_name.startswith('__'):
                    continue
                module = import_module('.' + module_name, package.__name__)
                for _type in vars(module).values():
                    if not isinstance(_type, type):
                        continue
                    if isabstract(_type):
                        continue
                    if not issubclass(_type, cls):
                        continue
                    try:
                        obj = _type()
                        cls._optimizations[obj.id] = obj
                    except:
                        pass
        return cls._optimizations