完全推荐系统的python代码

src/python/16.RecommendedSystem/test_graph-based.py

@@ -0,0 +1,17 @@
+
+def PersonalRank(G, alpha, root):
+    rank = dict()
+    rank = {x:0 for x in G.keys()}
+    rank[root] = 1
+    for k in range(20):
+        tmp = {x:0 for x in G.keys()}
+        for i, ri in G.items():
+            for j, wij in ri.items():
+                if j not in tmp:
+                    tmp[j] = 0
+                tmp[j] += 0.6 * rank[i] / (1.0 * len(ri))
+                if j == root:
+                    tmp[j] += 1 - alpha
+        rank = tmp
+    return rank
+