PyMySQL 0.6.4 has regression. So I released bugfix version of PyMySQL.
Since I've made mistake when releasing, new version is 0.6.6, not 0.6.5.
# CHANGES
* Add context manager to cursor
* Fix can't encode blob that is not utf-8 on PY3. (regression of 0.6.4,
Thanks to @wiggzz)