code: def get_string(self, significant_figures=6):
          
          ph = "{:.%df}" % significant_figures
          lines = []
          for bound, d in zip(self.bounds, "xyz"):
              fillers = bound + [d] * 2
              bound_format = " ".join([ph] * 2 + [" {}lo {}hi"])
              lines.append(bound_format.format(*fillers))
          if self.tilt:
              tilt_format = " ".join([ph] * 3 + [" xy xz yz"])
              lines.append(tilt_format.format(*self.tilt))
          return "\n".join(lines)
docs: Returns the string representation of simulation box in LAMMPS
          data file format.
  
          Args:
              significant_figures (int): No. of significant figures to
                  output for box settings. Default to 6.
  
          Returns:
              String representation