def PrintCategories():
 sys.stderr.write(''.join((('  %s\n' % cat) for cat in _ERROR_CATEGORIES)))
 sys.exit(0)

def PrintCategories ( ) : sys . stderr . write ( '' . join ( ( ( '  %s\n' % cat ) for cat in _ERROR_CATEGORIES ) ) ) sys . exit ( 0 )
prints a list of all the error-categories used by error messages .