Add PyObjectWrapper#inspect

Author: mrkn

lib/pycall/pyobject_wrapper.rb

@@ -152,6 +152,10 @@ def dup
       end
     end
 
+    def inspect
+      PyCall.builtins.repr(__pyptr__)
+    end
+
     def to_s
       LibPython::Helpers.str(__pyptr__)
     end