Dev gzf (#1440)

zhifu gao

2024-03-07 341182c3bfc62831aa02781d0e6bbe2a479f3fb2

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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)