Is there a function that takes a schema and a string, and uses SAP to parse the string according to the schema?

[nsfinkelstein]

I'm wondering whether there's a function I can use that takes a schema and a string, and tries to parse the string according to the schema using SAP. The function can be in rust or in python. I haven't been able to find anything about this in the documentation, but I imagine it must exist in the library.