fix the output of vad_results is null

凌匀

2023-03-13 85566dbb2a4d8d09f80a2460ae8c3e0a9d908cf4

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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)