The following code will create only one window at a time, the second window will only show when the first one is closed by the user.
How to show them at the same time with different titles?
nx.draw_networkx(..a..)
nx.draw_networkx(..b..)
It works the same as making other plots with Matplotlib. Use the figure() command to switch to a new figure.
import networkx as nx
import matplotlib.pyplot as plt
G=nx.cycle_graph(4)
H=nx.path_graph(4)
plt.figure(1)
nx.draw(G)
plt.figure(2)
nx.draw(H)
plt.show()