'surrogates not allowed' error on stored procedure call for unicode argument

[jinto]

On python 3.5.1, mysqlclient 1.3.7

cursor.callproc() with unicode string argument generates error below
'utf-8' codec can't encode character '\udceb' in position 39: surrogates not allowed

The code works if I change below code

def literal(self, o): 
    s = self.escape(o, self.encoders)
    if not PY2 and isinstance(s, bytes):
        return s.decode('ascii', 'surrogateescape')
    return s

to

def literal(self, o): 
    s = self.escape(o, self.encoders)
    if not PY2 and isinstance(s, bytes):
        return s.decode('utf8', 'surrogateescape')
    return s

changes : 'ascii' to 'utf8'
ps. tested string was korean string, "제권".

[jinto]

I think problem was not in literal(), but in the callproc() after calling literal().

RuntimeWarning: Surrogate character '\ude46' will be ignored. You might be using a narrow Python build

can u tell me about above error??

[jinto]

It was fixed by #91 .
I cannot remember the details. I think this is closed 3 years ago.
If you are interested in the issue you can digg into the pr above.