update with main (#1163)

zhifu gao

2023-12-11 85cabd30a9185cf5bebde4a6415a122142ea3b43

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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)