pip install sldt==1.0.4

Save your files with current date time appended; load the newest back without specifying file name everytime

Source
Among fairly niche packages on PyPI.
Over 492 downloads in the last 90 days.

Version usage of sldt

Proportion of downloaded versions in the last 3 months (only versions over 1%).

1.0.4

25.61%

1.0.3

17.28%

1.0.2

16.67%

1.0.1

14.02%

1.0.0

13.62%

0.0.1

12.80%