Discover why 'if not mylist' is twice as fast as 'len(mylist) == 0' by examining CPython's VM instructions and object memory access patterns.
  • sugar_in_your_tea@sh.itjust.worksEnglish
    2·
    1 month ago

    That’s worse. IMO, solve this problem with two things:

    • type hint mylist as list | None or just list
    • use if not mylist:

    The first documents intent and gives you static analysis tools some context to check for type consistency/compatibility, and the second shows that None vs empty isn’t an important distinction here.