chore: import upstream snapshot with attribution

2026-07-13 12:36:30 +08:00
commit 55ab4e4a73
473 changed files with 72932 additions and 0 deletions
@@ -0,0 +1,16 @@
+#include "operation.h"
+#include "graph.h"
+
+py::object density(py::object G) {
+    Graph& G_ = G.cast<Graph&>();
+    int n = G_.node.size();
+    int m = G.attr("number_of_edges")().cast<int>();
+    if (m == 0 || n <= 1) {
+        return py::cast(0);
+    }
+    weight_t d = m * 1.0 / (n * (n - 1));
+    if(G.attr("is_directed")().equal(py::cast(false))){
+        d*=2;
+    }
+    return py::cast(d);
+}