add RecordCollection.findEntrypoints()

record.py

@@ -67,3 +67,12 @@ class RecordCollection():
 
             except KeyError:
                 pass
+
+    def findEntrypoints(self):
+        ret = []
+
+        for i in self.objects:
+            if not self.objects[i].parents:
+                ret.append(self.objects[i])
+
+        return ret

record_test.py

@@ -2,4 +2,7 @@ import record
 
 records = record.RecordCollection('datafile')
 
+entries = records.findEntrypoints()
+
 print(records.objects)
+print(entries)