how to get function to return nothing?

Goal is simply to avoid pages of records on html page as function runs

def utility_change_column_name(): #used once in a while by programmer.  Not 
used by users.
  for r in db.PostalCode:
      db((r.update(r.countryCode = r.countryCodeFromGeoNames))
  return(nothing)

thanks,

Alex Glaros

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