debug.py 文件源码

def __init__(self, *flags, **options):
        self._flags = flagNone
        if options.get('printer') is not None:
            self._printer = options.get('printer')
        elif self.defaultPrinter is not None:
            self._printer = self.defaultPrinter
        if 'loggerName' in options: 
            # route our logs to parent logger
            self._printer = Printer(
                logger=logging.getLogger(options['loggerName']),
                handler=NullHandler()
            )
        else:
            self._printer = Printer()
        self('running pyasn1 version %s' % __version__)
        for f in flags:
            inverse = f and f[0] in ('!', '~')
            if inverse:
                f = f[1:]
            try:
                if inverse:
                    self._flags &= ~flagMap[f]
                else:
                    self._flags |= flagMap[f]
            except KeyError:
                raise error.PyAsn1Error('bad debug flag %s' % f)

            self('debug category \'%s\' %s' % (f, inverse and 'disabled' or 'enabled'))