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- import os
 
 - import datetime as dt
 
 - if not os.path.exists('excel存放'):
 
 -     os.mkdir('excel存放')
 
 - for lujing,wenjianjia,wenjian in os.walk(os.getcwd()):
 
 -     for file in os.scandir(lujing):
 
 -         if file.name.endswith('xlsx'):
 
 -             data1 = dt.datetime.fromtimestamp(file.stat().st_mtime)
 
 -             newname = str(data1.year)+'-'+str(data1.month)+'-'+str(data1.day)+'-'+file.name
 
 -             os.rename(lujing+'/'+file.name,'excel存放/'+newname)
 
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