PyObject.GetHashCode() can throw an OverflowException becauseIntPtr.ToInt32() does throw. See

var ulongVal = (ulong)ptr;return (int)((uint)ulongVal ^ (uint)(ulongVal >> 32));

This happened to me when inserting into a dictionary using tensorflow objects as keys:

new Dictionary<dynamic, dynamic>() { { x, 1.0 }, { y, 1.0 }, }

Environment

• Pythonnet version: 2.3
• Python version: 3.5
• Operating System: Windows 7