debug.py 文件源码

def __init__(self, *flags, **options):
        self._flags = flagNone

        if 'loggerName' in options:
            # route our logs to parent logger
            self._printer = Printer(
                logger=logging.getLogger(options['loggerName']),
                handler=NullHandler()
            )

        elif 'printer' in options:
            self._printer = options.get('printer')

        else:
            self._printer = self.defaultPrinter

        self._printer('running pyasn1 %s, debug flags %s' % (__version__, ', '.join(flags)))

        for flag in flags:
            inverse = flag and flag[0] in ('!', '~')
            if inverse:
                flag = flag[1:]
            try:
                if inverse:
                    self._flags &= ~flagMap[flag]
                else:
                    self._flags |= flagMap[flag]
            except KeyError:
                raise error.PyAsn1Error('bad debug flag %s' % flag)

            self._printer("debug category '%s' %s" % (flag, inverse and 'disabled' or 'enabled'))