> For clean Markdown content of this page, append .md to this URL. For the complete documentation index, see https://buildwithfern.com/learn/llms.txt. ## 0.11.3 **`(fix):`** Transition from lists to sequences within function calls ### What's been fixed * Transition from lists to sequences within function calls, this is a fix as a result of how mypy handles type variance. This fix is only for function calls as testing shows that we do not hit the same issue within mypy with list\[union\[\*]] fields on pydantic objects. ### What's changed * Improvement: The Python SDK generator now defaults to `require_optional_fields = False`. This means that any requests that have optional fields no longer require a user to input data (or a `None` value) in.