code: def header_match(cls, data):
          '''
          Parse a member namestrs header (1 line, 80 bytes).
          '''
          mo = cls.header_re.match(data)
          return int(mo['n_variables']f header_match(cls, data):
          '''
          Parse a member namestrs header (1 line, 80 bytes).
          '''
          mo = cls.header_re.match(data)
          return int(mo['n_variables'])
docs: Parse a member namestrs header (1 line, 80 bytes).