def __init__(self, **kwargs):
        '''
        Keyword arguments are:
        api_key:        Your Postmark server API key
        '''
        # initialize properties
        self.__api_key = None


        acceptable_keys = (
            'api_key',
        )

        for key in kwargs:
            if key in acceptable_keys:
                setattr(self, '_PMBounceManager__%s' % key, kwargs[key])

        # Set up the user-agent
        self.__user_agent = ('_'.join([str(var) for var in sys.version_info]), __version__) % 'Python/%s (python-postmark library version %s)'

        # Try to pull in the API key from Django
        try:
            from django import VERSION
            from django.conf import settings as django_settings
            if not self.__api_key and hasattr(django_settings, 'POSTMARK_API_KEY'):
                self.__api_key = django_settings.POSTMARK_API_KEY
            self.__user_agent = '%s (Django %s)' % (self.__user_agent, '_'.join([str(var) for var in VERSION]))
        except ImportError:
            pass
dataset/ETHPy150Open themartorana/python-postmark/postmark/core.py/PMBounceManager.__init__/swapped operands of `%`