def scale_tree_branch(tree, format="newick"):
tree_obj = None
if os.path.exists(tree):
tree_obj = Tree.get_from_path(tree, format)
elif isinstance(tree, str):
tree_obj = Tree(stream=StringIO(tree), schema=format)
elif isinstance(tree, Tree):
tree_obj = Tree
if sum([ e.length > 1 for e in tree_obj.postorder_edge_iter()]):
for e in tree_obj.postorder_edge_iter():
if e.length is not None:
e.length = e.length/100
return tree_obj.as_newick_string()
