Merge pull request #1036 from alibaba-damo-academy/hnluo-patch-1

hnluo

2023-10-23 1b1565bedb209d8bcc729c4f8e951d18895bdf03

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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)