add dynamic batch for fetch

雾聪

2024-04-19 63a70a00f7c9f162e8d7b3e330516438fb8cd87b

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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)