Fixed database typo and removed unnecessary class identifier.

venv/share/doc/networkx-2.5/examples/basic/plot_properties.py

@@ -0,0 +1,48 @@
+"""
+==========
+Properties
+==========
+
+Compute some network properties for the lollipop graph.
+"""
+
+import matplotlib.pyplot as plt
+from networkx import nx
+
+G = nx.lollipop_graph(4, 6)
+
+pathlengths = []
+
+print("source vertex {target:length, }")
+for v in G.nodes():
+    spl = dict(nx.single_source_shortest_path_length(G, v))
+    print(f"{v} {spl} ")
+    for p in spl:
+        pathlengths.append(spl[p])
+
+print()
+print(f"average shortest path length {sum(pathlengths) / len(pathlengths)}")
+
+# histogram of path lengths
+dist = {}
+for p in pathlengths:
+    if p in dist:
+        dist[p] += 1
+    else:
+        dist[p] = 1
+
+print()
+print("length #paths")
+verts = dist.keys()
+for d in sorted(verts):
+    print(f"{d} {dist[d]}")
+
+print(f"radius: {nx.radius(G)}")
+print(f"diameter: {nx.diameter(G)}")
+print(f"eccentricity: {nx.eccentricity(G)}")
+print(f"center: {nx.center(G)}")
+print(f"periphery: {nx.periphery(G)}")
+print(f"density: {nx.density(G)}")
+
+nx.draw(G, with_labels=True)
+plt.show()