non-empty format string passed to object.__format__

[ajendrex]

Hello,

following the sample code from README.md, I get the following error:

g.Vertex("Humphrey Bogart").All()
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-18-5ec9876cb5d1> in <module>()
----> 1 g.Vertex("Humphrey Bogart").All()

/home/hurbina/src/pyley/pyley/__init__.py in Vertex(self, *node_ids)
     76             return self.V()
     77 
---> 78         return self.V(node_ids)
     79 
     80     def Morphism(self):

/home/hurbina/src/pyley/pyley/__init__.py in V(self, *node_ids)
     60         for index, node_id in enumerate(node_ids):
     61             if index == l - 1:
---> 62                 builder.append(u"'{0:s}'".format(node_id))
     63             else:
     64                 builder.append(u"'{0:s}',".format(node_id))

TypeError: non-empty format string passed to object.__format__

I'm ultimately looking to use this library to create a graph (insert vertex and links), is that possible? how?

Thanks,
H.