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fileDir = 'A'
tarDir = 'B' 
import os, random, shutil  
  
def copyFile(fileDir):  
 
    pathDir = os.listdir(fileDir)  
 
    sample = random.sample(pathDir, 10000)   
    for name in sample:  
        shutil.copyfile(fileDir+name, tarDir+name)  
if __name__ == '__main__':
    copyFile(fileDir)