Fix TypeError

✅ Solution

The "TypeError: object of type 'int' has no len()" in dspy often arises when a function expects a sequence-like object (e.g., list, string) but receives an integer instead, particularly when dealing with usage tracking data or model outputs where length is being calculated. To fix this, ensure that the function receives the expected data type by either converting the integer to a string or list (if appropriate) or verifying the logic that produces the integer value in the first place. Check for incorrect assumptions or data types during usage entry merging or when handling Anthropic model responses.