LazilyUnpickling{Dict,List}: add __repr__ (inducer#817)

* LazilyUnpickling{Dict,List}: better repr

* add type to repr of PickledObject

loopy/tools.py

@@ -348,6 +348,9 @@ def unpickle(self):
     def __getstate__(self):
         return {"objstring": self.objstring}
 
+    def __repr__(self) -> str:
+        return type(self).__name__ + "(" + repr(self.unpickle()) + ")"
+
 
 class _PickledObjectWithEqAndPersistentHashKeys(_PickledObject):
     """Like :class:`_PickledObject`, with two additional attributes:
@@ -406,6 +409,9 @@ def __getstate__(self):
             key: _PickledObject(val)
             for key, val in self._map.items()}}
 
+    def __repr__(self) -> str:
+        return type(self).__name__ + "(" + repr(self._map) + ")"
+
 # }}}
 
 
@@ -444,6 +450,9 @@ def __add__(self, other):
     def __mul__(self, other):
         return self._list * other
 
+    def __repr__(self) -> str:
+        return type(self).__name__ + "(" + repr(self._list) + ")"
+
 
 class LazilyUnpicklingListWithEqAndPersistentHashing(LazilyUnpicklingList):
     """A list which lazily unpickles its values, and supports equality comparison