def edge_attributes(self, edge):
try:<EOL><INDENT>return self.edge_attr[edge]<EOL><DEDENT>except KeyError:<EOL><INDENT>return []<EOL><DEDENT>
Return the attributes of the given edge.

@type  edge: edge
@param edge: One edge.

@rtype:  list
@return: List of attributes specified tuples in the form (attribute, value).