[Python] Interaction between networkx and matplotlib

I am trying networkx and visualization in matplotlib an I'm confused becouse I do not clearly understand how do they interact with each other? There simple example

import matplotlib.pyplot
import networkx as nx
G=nx.path_graph(8)
nx.draw(G)
matplotlib.pyplot.show()


Where do I tell pyplot, that I want to draw graph G? I guess that nx.draw use something like matplotlib.pyplot.{plot, etc ...} So, if I want to draw 2 graphs:

import matplotlib.pyplot
import networkx as nx

G=nx.path_graph(8)
E=nx.path_graph(30)
nx.draw(G)

matplotlib.pyplot.figure()
nx.draw(E)
matplotlib.pyplot.show()


Then... little experiment

import networkx as nx
G=nx.path_graph(8)
E=nx.path_graph(30)
nx.draw(G)
import matplotlib.pyplot
matplotlib.pyplot.figure()
nx.draw(E)
import matplotlib.pyplot as plt
plt.show()


Please don't kill me about this stupid code, I am just trying to understand - how do networkx draw something matplotlib, while it even doesn't import yet!

P.S: Sorry for my English.

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