Browser mode error

[rubenhm]

Hi Chris,

I am interested in your analysis and cloned your repository.
I ran the following in the command line (I am using Ubuntu 16.04 with the latest Anaconda Python 2.7 distribution).

python govtrack.py 112 senate --browser

and I received the following response:

Traceback (most recent call last):
  File "govtrack.py", line 357, in <module>
    json_graph.dump(g, fout)
AttributeError: 'module' object has no attribute 'dump'

The command without the --browser option

python govtrack.py 112 senate 

only provides a non-interactive image in a pop-up window (the image appears to be different every time the above command is ran).
Any suggestions?

Thanks,
Ruben.