<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def parse_history_node(h_node):
 """ Parses a History Node object from either a dict or a tuple. Args: h_node: A dict with name/url/description fields or a 3-element tuple. Returns: History node. """

        if isinstance(h_node, dict):
            return HistoryNode.from_dict(h_node)

        else:
            if len(h_node) != 3:
                raise ValueError("Invalid History node, "
                                 "should be dict or (name, version, "
                                 "description) tuple: {}".format(h_node))
            return HistoryNode(h_node[0], h_node[1], h_node[2])