Dev gzf (#1435)

zhifu gao

2024-03-06 294c1162df0141f5f8ed1c5fd79ff88b948e8467

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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)