您没有正确使用bytes函数.检查一下:

You are not using the bytes function correctly. Check this:

>>> a = "hi"
>>> bytes(a, encoding='utf8')
b'hi'

您可以尝试:

bytes((create_jsonlines(source)), encoding='utf8')

encoding是bytes函数的参数，您正在该函数之外使用它.

encoding is the argument of the bytes function, and you are using it outside of that function.