styles.py 文件源码

def unpickleMethod(im_name,
                    im_self,
                    im_class):
    'support function for copy_reg to unpickle method refs'
    try:
        unbound = getattr(im_class,im_name)
        if im_self is None:
            return unbound
        bound=instancemethod(unbound.im_func,
                                 im_self,
                                 im_class)
        return bound
    except AttributeError:
        log.msg("Method",im_name,"not on class",im_class)
        assert im_self is not None,"No recourse: no instance to guess from."
        # Attempt a common fix before bailing -- if classes have
        # changed around since we pickled this method, we may still be
        # able to get it by looking on the instance's current class.
        unbound = getattr(im_self.__class__,im_name)
        log.msg("Attempting fixup with",unbound)
        if im_self is None:
            return unbound
        bound=instancemethod(unbound.im_func,
                                 im_self,
                                 im_self.__class__)
        return bound