解决方法，可以在应用连接字符串url 连接属性加上local_code=1指定客户端字符编码方式。
#local_code=1 表示执行客户端的本地编码是UTF-8，否则默认是GBK
dm_conn = dmPython.connect(user=dm_user, password=dm_password, server='localhost', port=5236, local_code=1)
参考网址https://www.cnblogs.com/fangzpa/p/17285493.html
- multibyte 字符 dmPython 39 positionmultibyte字符dmpython 39 unicodedecodeerror multibyte 39 position unicodedecodeerror 39 position multibyt character multibyte position illegal 39 unicodeencodeerror character multibyte unicodedecodeerror byte 39 position 39 position decode codec unicodeencodeerror characters 39 position unicodedecodeerror 39 position ordinal byte 39 position invalid