30 lines
753 B
Python
30 lines
753 B
Python
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"""
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==========
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Self-loops
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==========
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A self-loop is an edge that originates from and terminates the same node.
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This example shows how to draw self-loops with `nx_pylab`.
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"""
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import networkx as nx
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import matplotlib.pyplot as plt
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# Create a graph and add a self-loop to node 0
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G = nx.complete_graph(3, create_using=nx.DiGraph)
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G.add_edge(0, 0)
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pos = nx.circular_layout(G)
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# As of version 2.6, self-loops are drawn by default with the same styling as
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# other edges
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nx.draw(G, pos, with_labels=True)
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# Add self-loops to the remaining nodes
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edgelist = [(1, 1), (2, 2)]
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G.add_edges_from(edgelist)
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# Draw the newly added self-loops with different formatting
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nx.draw_networkx_edges(G, pos, edgelist=edgelist, arrowstyle="<|-", style="dashed")
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plt.show()
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