My problem with libraries like this in Python is that, because nobody wants to have to hand write semantic validation code, they end up mashing semantics into t

My problem with libraries like this in Python is that, because nobody wants to have to hand write semantic validation code, they end up mashing semantics into the parser. What I want is for all the different file formats to be different syntaxes for Data, defined recursively as Data = str | list[Data] | dict[str, Data] Leave validation to other libraries. You can get very far simply by reflecting on type annotations.