| def keep_last_occurrences(lst): | |
| last_occurrences = {} | |
| result = [] | |
| for index, string in lst: | |
| last_occurrences[index] = string | |
| for index, string in lst: | |
| if last_occurrences[index] == string: | |
| result.append((index, string)) | |
| last_occurrences[index] = None | |
| return result |