def _rename(self, node, name):
if node.label:<EOL><INDENT>try:<EOL><INDENT>float(node.label)<EOL>new_label = "<STR_LIT>" % (node.label,<EOL>name)<EOL><DEDENT>except ValueError:<EOL><INDENT>new_label = "<STR_LIT>" % (node.label,<EOL>name)<EOL><DEDENT>node.label = new_label<EOL><DEDENT>else:<EOL><INDENT>node.label = name<EOL><DEDENT>
Rename an internal node of the tree. If an annotation is already
present, append the new annotation to the end of it. If a bootstrap
value is present, add annotations are added after a ":" as per standard
newick format.

Parameters
----------
node: dendropy.Node
    dendropy.Node object
name    : string
    Annotation to rename the node with.