book_policy.py 文件源码

def __call__(self, books_needed):
        '''Look up the appropriate routine or throw an error'''
        self.LCEobj.errno = errno.ENOSYS
        try:
            policy_func = self.__class__.__dict__['_policy_' + self.name]
            return policy_func(self, books_needed)
        except KeyError as e:
            # AssertionError is a "gentler" reporting path back to user
            raise AssertionError('"%s" is not implemented' % self.name)

###########################################################################
# This is NOT for testing, just a quick entry without the full Librarian.