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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_leaf_node_path_list(self, sep=os.path.sep, type_str=None):
 """Get paths for all leaf nodes for the tree rooted at this node. Args: sep: str One or more characters to insert between each element in the path. Defaults to "/" on Unix and "\" on Windows. type_str: SUBJECT_NODE_TAG, TYPE_NODE_TAG or None. If set, only include information from nodes of that type. Returns: list of str: The paths to the leaf nodes for the tree rooted at this node. """

        return [v.get_path_str(sep, type_str) for v in self.leaf_node_gen]