import networkx as nx
import matplotlib.pyplot as plt
import StringIO
from matplotlib.figure import Figure

class MyGraph(nx.Graph):
  def _repr_svg_(self):
     plt.ioff() # turn off interactive mode
     fig=plt.figure(figsize=(2,2))
     ax = fig.add_subplot(111)
     nx.draw_shell(self, ax=ax)
     output = StringIO.StringIO()
     fig.savefig(output,format='svg')
     plt.ion() # turn on interactive mode
     return output.getvalue()


g=nx.random_graphs.binomial_graph(10,.5)
f=MyGraph(g)
f


f.remove_nodes_from([0,3,7,5] )
f # this triggers the _repr_svg function in the notebook

import matplotlib.pyplot as plt
from io import BytesIO

def graph_to_svg(g):
    """return the SVG of a matplotlib figure generated from a graph"""
    fig=plt.figure(figsize=(2,2))
    ax = fig.add_subplot(111)
    nx.draw_shell(g, ax=ax)
    output = BytesIO()
    fig.savefig(output, format='svg')
    plt.close(fig)
    return output.getvalue()

from IPython.display import display, SVG
display(SVG(graph_to_svg(g)))

formatter = get_ipython().display_formatter.formatters['image/svg+xml']
formatter.for_type(nx.Graph, graph_to_svg)

g

g.remove_nodes_from([0,3,7,5])
g # this triggers the graph_to_svg function in the notebook