Finding name of variable?

[Gardner Pomper]

Hi,

I am writing a specialized xml serialization function, and I would like to
be able to serialize the value of a simple object with the object name as
the tag. For example:

   first_name = 'Fred'

  sXML = my_xml_serializer(first_name)

should result in sXML = '<first_name>Fred</first_name>'

I can get class and field names, but how do I find the name of a simple
variable?

Thanks!

- Gardner
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