def parse_call_group(source, info, ch, pos):
 if (ch == 'R'):
  group = '0'
 else:
  group = (ch + source.get_while(DIGITS))
 source.expect(')')
 return CallGroup(info, group, pos)

def parse_call_group ( source , info , ch , pos ) : if ( ch == 'R' ) : group = '0' else : group = ( ch + source . get_while ( DIGITS ) ) source . expect ( ')' ) return CallGroup ( info , group , pos )
parses a call to a group .