getting the source line number

[Skaperen]

my code is a function that takes the name of a variable (or variable.attribute) as a string, looks in the caller's local (if not in local, then next in global) space, and prints it out, name, value and which space it was found in, or if not found, name and that it is not assigned.  all arguments are processed like that.  i want to add the line number at the start so it identifies which call to it outputs which variable vales.