code: def to_csv(self, filename: str, latexify_names: bool = False):
          
  
          elements = set()
          for entry in self.entries:
              elements.update(entry.composition.elements)
          elements = sorted(list(elements), key=lambda a: a.X)
          writer = csv.writer(open(filename, "w"), delimiter=unicode2str(","),
                              quotechar=unicode2str("\""),
                              quoting=csv.QUOTE_MINIMAL)
          writer.writerow(["Name"] + elements + ["Energy"])
          for entry in self.entries:
              row = [entry.name if not latexify_names
                     else re.sub(r"([0-9]+)", r"_{\1}", entry.name)]
              row.extend([entry.composition[el] for el in elements])
              row.append(entry.energy)
              writer.writerow(row)
docs: Exports PDEntries to a csv
  
          Args:
              filename: Filename to write to.
              entries: PDEntries to export.
              latexify_names: Format entry names to be LaTex compatible,
                  e.g., Li_{2}O