+```python
+# excess_death_data = {
+# 'start_date': str(raw_data_2020.loc[12].droplevel(1)['Week ended']),
+# 'end_date': str(raw_data_2020.iloc[-1].droplevel(1)['Week ended']),
+# 'excess_deaths': (deaths_headlines.loc[12:].total_2020 - deaths_headlines.loc[12:].previous_mean).sum()
+# }
+
+# with open('excess_deaths.json', 'w') as f:
+# json.dump(excess_death_data, f)
+```
+
+```python
+eng_xls['Week ended']
+```
+
+```python
+# raw_data_2020.droplevel(1, axis='columns')['Week ended']
+```
+
+```python
+deaths_by_week = deaths_headlines.merge(eng_xls['Week ended'], left_index=True, right_index=True)
+deaths_by_week.rename(columns={'Week ended': 'week_ended'}, inplace=True)
+deaths_by_week.to_csv('deaths_by_week.csv', header=True, index=False)
+```
+
+```python
+# deaths_by_week = deaths_headlines.merge(raw_data_2020.droplevel(1, axis='columns')['Week ended'], left_index=True, right_index=True)
+# deaths_by_week.rename(columns={'Week ended': 'week_ended'}, inplace=True)
+# deaths_by_week.to_csv('deaths_by_week.csv', header=True, index=False)
+```
+