link.py 文件源码

def add_link(self, name, link):
        """Registers a child link to this chain.

        The registered link is saved and loaded on serialization and
        deserialization, and involved in the optimization. The registered link
        is called a child. The child link is set to an attribute of the chain
        with the given name.

        This method also sets the :attr:`~Link.name` attribute of the
        registered link. If the given link already has the name attribute set,
        then it raises an error.

        Args:
            name (str): Name of the child link. This name is also used as the
                attribute name.
            link (Link): The link object to be registered.

        """
        if link.name is not None:
            raise ValueError(
                'given link is already registered to another chain by name %s'
                % link.name)
        d = self.__dict__
        if name in d:
            raise AttributeError(
                'cannot register a new link %s: attribute exists' % name)
        self._children.append(name)
        link.name = name
        d[name] = link