Remove 'useless' read books from recommendation-graph (far away from all

unread books)

caliGraph.py

@@ -276,6 +276,24 @@ def removeUnusedRecommenders(G):
             else: # No unrated recommendation
                 G.remove_node(n)
 
+def removeUselessReadBooks(G):
+    for n in list(G.nodes):
+        node = G.nodes[n]
+        if node['t'] == 'book':
+            for adj in G.adj[n]:
+                foundUnread = True
+                adjNode = G.nodes[adj]
+                for cousin in G.adj[adj]:
+                    cousinNode = G.nodes[cousin]
+                    if cousinNode['t']=='book' and 'score' in cousinNode:
+                        break
+                else: # No unrated book here
+                    foundUnread = False
+                if foundUnread:
+                    break
+            else: # No unrated book in cousins
+                G.remove_node(n)
+
 def scoreOpinions(G, globMu, globStd, errorFac=0.5):
     for n in list(G.nodes):
         node = G.nodes[n]
@@ -517,6 +535,7 @@ def recommendNBooks(G, mu, std, n, removeTopListsB=True, removeUselessRecommende
     removeDangling(G, alsoBooks=False)
     pruneTags(G, 6)
     removeBad(G, mu, groups=['book'])
+    removeUselessReadBooks(G)
     pruneTags(G, 4.25)
     pruneRecommenderCons(G, int(n/7)+1)
     pruneAuthorCons(G, int(n/15))