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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def save(self, list_file):
 """Saves the current list of annotations to the given file. **Parameters:** ``list_file`` : str The name of a list file to write the currently stored list into """

    bob.io.base.create_directories_safe(os.path.dirname(list_file))
    with open(list_file, 'w') as f:
      for i in range(len(self.image_paths)):
        f.write(self.image_paths[i])
        for bbx in self.bounding_boxes[i]:
          f.write("\t[%f %f %f %f]" % (bbx.top_f, bbx.left_f, bbx.size_f[0], bbx.size_f[1]))
        f.write("\n")