Add str method that gives brief summary of the graph

petercorke · petercorke · commit 656f6a7a9f76 · 2021-06-17T14:25:20.000+10:00
diff --git a/pgraph/PGraph.py b/pgraph/PGraph.py
@@ -33,6 +33,10 @@ def __init__(self, arg=None, metric=None, heuristic=None, verbose=False):
         else:
             self.heuristic = heuristic
 
+    def __str__(self):
+        s = f"{self.__class__.__name__}: {self.n} vertices, {self.ne} edges, {self.nc} components"
+        return s
+
     @classmethod
     def Dict(cls, d, direction='BT', reverse=False):
 
