text: import os
  from pathlib import Path
  from shutil import copyfile
  def stu_activities(rootDir):
      # set the rootDir where the search will start
      # that is in home dorectory
      #rootDir = "Downloads"
      # build rootDir from rootDir with the base as home "~"
      rootDir = os.path.join(Path.home(),rootDir)
      # traverse rootDir and locate the files
      ####
      # when the path has Stu_ in it 
      ####
      # store currenet directory and build target directory based on current directory 
  
      curDir=os.path.curdir
      targetDir=os.path.join(curDir,"target")
  
      print(f'{targetDir}')
      if not os.path.exists(targetDir):
          os.makedirs(targetDir)
      moveOn = True
      for dirName, subdirList, fileList in os.walk(rootDir):
          if ( "Stu_" in dirName ):
              for fname in fileList:
                  sourceFile = os.path.join(dirName,fname)
                  targetFile = os.path.join(targetDir,fname)
                  #print('\t%s' % sourceFile)
                  #print(f'{targetDir}')
                  if not os.path.exists(targetFile):
                      copyfile(sourceFile, targetFile)
                  else:
                      print(f'excuse me I can not copy \n source file {sourceFile} as \n target file {targetFile} exists')
                      moveOn = False
                      break
              else:
                  if ( not moveOn ):
                      break
              if ( not moveOn ):
                      break
  stu_activities("Downloads")
  # test
  