Function build_derive_from_pyobject

pub fn build_derive_from_pyobject(tokens: &DeriveInput) -> Result<TokenStream>

Derive FromPyObject for enums and structs.

• Max 1 lifetime specifier, will be tied to FromPyObject’s specifier
• At least one field, in case of #[transparent], exactly one field
• At least one variant for enums.
• Fields of input structs and enums must implement FromPyObject or be annotated with from_py_with
• Derivation for structs with generic fields like struct<T> Foo(T) adds T: FromPyObject on the derived implementation.