text: import os
  
  ANNOTATIONS_DIR = "labels"
  DESTINATION_DIR = "labels_2"
  
  def read_file(file_path):
      with open(ANNOTATIONS_DIR+"/"+file_path, 'r') as file:
          line = file.readlines()[0]
          line = '0' + line[1:]
      with open(DESTINATION_DIR + "/" + file_path, 'a') as file:
          file.write(line)
  
  def start():
      if not os.path.exists(DESTINATION_DIR):
          os.makedirs(DESTINATION_DIR)
      for filename in os.listdir(ANNOTATIONS_DIR):
          if filename.endswith('txt'):
              read_file(filename)
          else:
              print("Skipping file: {}".format(filename))
  
  
  if __name__ == "__main__":
      start()
  