......
/usr/local/lib/python3.6/site-packages/pymysqlreplication/__init__.py:23: in <module>
    from .binlogstream import BinLogStreamReader
/usr/local/lib/python3.6/site-packages/pymysqlreplication/binlogstream.py:10: in <module>
    from .packet import BinLogPacketWrapper
/usr/local/lib/python3.6/site-packages/pymysqlreplication/packet.py:7: in <module>
    from pymysqlreplication import constants, event, row_event
/usr/local/lib/python3.6/site-packages/pymysqlreplication/row_event.py:9: in <module>
    from pymysql.charset import charset_to_encoding
E   ImportError: cannot import name 'charset_to_encoding'