How to solve “too many arguments to return” issue

You need to specify what you will return after specifying the input parameters, this is not python.

This:

func Print(DATA []TD, include string, exclude []string, str string) {

Should be:

func Print(DATA []TD, include string, exclude []string, str string) string {

Recommended reads:

• http://golang.org/doc/effective_go.html#multiple-returns

• http://golang.org/doc/effective_go.html#named-results

Or even all of effective go