None propagation. It such a pain to constantly check for None when accessing very deep nested structures (as I had to do often with JSON data). There is a PEP

None propagation. It such a pain to constantly check for None when accessing very deep nested structures (as I had to do often with JSON data). There is a PEP for this[1] but it is currently deferred. [1]: https://peps.python.org/pep-0505/ https://peps.python.org/pep-0505/