Rename all nodes in a graph to a sequence of numbers

I am using the NetworkX graph library for Python. At some point in my program I would like to "consolidate" my nodeIDs into a sequence of numbers. Here's my naive approach:

start = 1 # could be anything
for i, n in enumerate(g.nodes()):
    if i+start == n:
        continue
    g.add_node(i+start, attr_dict=g.node[n])
    g.add_edges_from([(i+start, v, g[n][v]) for v in g.neighbors(n)])
    g.remove_node(n)

Is there a faster way than this exhaustive copy of all the neighbors? For example, I tried g[i+start] = g[n], but that is forbidden.

Thanks!