how to create root with treelib?

[MRAB]

On 2017-08-20 01:58, Ho Yeung Lee wrote:
> http://treelib.readthedocs.io/en/latest/examples.html
> 
> tree = Tree()
> #create root
> tree.create_node((0,0), "root")
> result = [aa[0]]
> previousnode = (0,0)
> 
>>>> #create root
> ... tree.create_node((0,0), "root")
> Traceback (most recent call last):
>    File "<stdin>", line 2, in <module>
>    File "C:\Python27\lib\site-packages\treelib\node.py", line 142, in __repr__
>      "tag=%r" % self.tag,
> TypeError: not all arguments converted during string formatting
> 
You should probably report that as a bug.