Merge pull request #1157 from alibaba-damo-academy/dev_lhn

hnluo

2023-12-07 73959c6e8e80a6e735bbb7d63acf942a6e2f652d

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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)