Short name describing what triggered the graph break
Cannot trace user-defined len
Values or code snippet captured at the break point
{self.python_type_name()}.len()
Explanation of why the graph break was triggered
Dynamo cannot trace len() on {self.python_type_name()} because the len method is either not traceable (e.g., defined in C or built-in) or returns a non-constant value.
Hints on how to resolve the graph break