code: def _copy_files(source, target):
      
      source_files = listdir(source)
      if not exists(target):
          makedirs(target)
      for filename in source_files:
          full_filename = join(source, filename)
          if isfile(full_filename):
              shutil.copy(full_filename, target)
docs: Copy all the files in source directory to target.
  
      Ignores subdirectories.