+from email import message
+from email import utils
+
+
+def _formatparam(param, value=None, quote=True):
+ """This is _formatparam from Python 2.7"""
+ if value is not None and len(value) > 0:
+ # A tuple is used for RFC 2231 encoded parameter values where items
+ # are (charset, language, value). charset is a string, not a Charset
+ # instance.
+ if isinstance(value, tuple):
+ # Encode as per RFC 2231
+ param += '*'
+ value = utils.encode_rfc2231(value[2], value[0], value[1])
+ # BAW: Please check this. I think that if quote is set it should
+ # force quoting even if not necessary.
+ if quote or message.tspecials.search(value):
+ return '%s="%s"' % (param, utils.quote(value))
+ else:
+ return '%s=%s' % (param, value)
+ else:
+ return param
+
+
+# Replace with this _formatparam to avoid re-encoding non-ascii params
+message._formatparam = _formatparam