update train recipe

游雁

2024-02-21 8ea5f1302d1eb64ac1c00799c83b50f15c793633

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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)