docs: def ext_pillar(
          mid,
          pillar,
          path,
          idkey='id',
          namespace=None,
          fieldnames=None,
          restkey=None,
          restval=None,
          dialect='excel'):
      '''
      Read a CSV into Pillar
  
      :param str path: Absolute path to a CSV file.
      :param str idkey: (Optional) The column name of minion IDs.
      :param str namespace: (Optional) A pillar key to namespace the values under.
      :param list fieldnames: (Optional) if the first row of the CSV is not
          column names they may be specified here instead.
      '''
      with salt.utils.files.fopen(path, 'rb') as f:
          sheet = csv.DictReader(f, fieldnames,
                  restkey=restkey, restval=restval, dialect=dialect)
  
          for row in sheet:
              if row[idkey] == mid:
                  if namespace:
                      return {namespace: row}
                  else:
                      return row
  
      return {}