Merge pull request #69 from alibaba-damo-academy/dev_lhn

hnluo

2023-02-07 209abf43ea9ad446c0a0af7950164b2fd7b8f59f

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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)