Here is an example for a fioAdds.py file:
#!/usr/bin/env python
#
# this script returns output to be filled into the header of a .fio file.
# allowed combinations: list, dict, [list], [dict], [list, dict], [dict, list]
#
def main():
dct = {}
dct['fioAdd_par1'] = "value1"
dct['fioAdd_par2'] = "value2"
dct['fioAdd_par3'] = "value3"
lst = []
lst.append( 'fioAdd_line1')
lst.append( 'fioAdd_line2')
lst.append( 'fioAdd_line3')
return [dct, lst]
if __name__ == '__main__':
main()