def _set_charset(self, mime):
from email.Charset import Charset, QP, BASE64, SHORTEST
mime_encoding = self.config.get('notification', 'mime_encoding').lower()
charset = Charset()
charset.input_charset = 'utf-8'
charset.output_charset = 'utf-8'
charset.input_codec = 'utf-8'
charset.output_codec = 'utf-8'
if mime_encoding == 'base64':
charset.header_encoding = BASE64
charset.body_encoding = BASE64
elif mime_encoding in ('qp', 'quoted-printable'):
charset.header_encoding = QP
charset.body_encoding = QP
elif mime_encoding == 'none':
charset.header_encoding = SHORTEST
charset.body_encoding = None
del mime['Content-Transfer-Encoding']
mime.set_charset(charset)
