Merge pull request #1040 from alibaba-damo-academy/hnluo-patch-2

hnluo

2023-10-25 8a84ed6a4a6ac6958a480961dc2f1606b1ac7fb6

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# -*- coding: utf-8 -*-
 
 
try:
    strtype = basestring
except NameError:
    strtype = str
 
 
def to_s(val):
    try:
        return unicode(val)
    except NameError:
        return str(val)