Thanks for teaching me something, but the obscurity of your answer just illustrates how rare that requirement is in human readable formats, and mostly limited to data formats designed for numeric precision, like HDF5, FITS or protobuf.

What text based serialization formats do enforce numeric precision?

AFAIK it’s always left up to the writer (serializer)

If you’re using a library to handle deserialization , the ugliness of the serial format doesn’t matter that much.

Just call yaml.load() and forget about it.

The missing middle section was documentation and QA getting worse