I’m pretty sure there will be new keywords in Python in the future that only solve one thing.
Right now all the imports are getting resolved at runtime example in a code like below
from file1 import function1
If lazy imports suddenly defer execution, those side effects won’t run until much later (or not at all, if the code path isn’t hit). That shift in timing could easily break existing code that depends on import-time behavior.
To avoid using lazy, this there is also a proposal of adding the modules you want to load lazily to a global `__lazy_modules__` variable.
from lazy import make_lazy
from package import module @make_lazy @local @nogil
The problem with new keywords is that you have to stick to the newest Python version every time a new keyword is added. Older Python versions will give a syntax error. It's a big problem for libraries. You need to wait for 3-5 years before adding it to a library. There are a lot of people who still use Python 3.8 from 2019.
But I don’t think I really agree, the extensible annotation syntaxes they mention always feel clunky and awkward to me. For a first-party language feature (especially used as often as this will be), I think dedicated syntax seems right.
Introducing new keyword has become a recent thing in Python.
Seems Python has a deep scare since Python2 to Python3 time and is scared to do anything that causes such drama again.
For me, the worst of all is "async". If 2to3 didn't cause much division, the async definitely divided Python libraries in 2. Sync and Async.
Maybe if they want backward compatible solution, this can be done by some compile or runtime flag like they did with free threading no-gil.
My main complaint, though, about Python async is - because it is opt-in I never know if I forgot a sync IO call somewhere that will block my worker. JS makes everything async by default and there is effectively no chance of blocking.
They took a decade to solidify that. At some point, you have to balance evolution and stability. For a language as popular as Python, you can not break the world every week, but you can't stay put for 5 years.