def calcAvg(self):
table = PluginTable();
row = table.execute('''select count(*) as items_count, sum(ratings) as total_ratings,
sum(ratings_count) as total_ratings_count, sum(downloads) as total_downloads from
scripts''')[0];
avg_score = row['total_ratings'] / float(row['total_ratings_count'])
avg_persons=row['total_ratings_count'] / float(row['items_count'])
return {'score':avg_score, 'persons':avg_persons}
