MySQL JSON field type with string should decode in python3

[howmp]

Table:

CREATE TABLE test (id int, value json);

With data:

id	value
1	{"string1":"string2"}

But event's values in python3 is :

{"id":1,"value":{b"string1":b"string2"}

And when use json.dumps will raise TypeError: keys must be a string

[howmp]

According to rfc7159 : https://tools.ietf.org/html/rfc7159#section-8.1

JSON text SHALL be encoded in UTF-8, UTF-16, or UTF-32. The default encoding is UTF-8

So should decode as utf-8