4 ms·

In Python 4.0 (the one after 3.9), and in Python 3.7 now with "from future import annotations", annotations are parsed but their interpolation is delayed. S

by 1st1 8y ago

In Python 4.0 (the one after 3.9), and in Python 3.7 now with "from __future__ import annotations", annotations are parsed but their interpolation is delayed. So you can literally have "var: 0 < var < 3" (annotation is not a string!) in your code and make it work as you wish.

StavrosK 8y ago
FYI, the Python version after 3.9 will be 3.10.
- 1st1 8y ago
  Who told you that? ;)
  - StavrosK 8y ago
    This post: https://www.curiousefficiency.org/posts/2014/08/python-4000.html https://www.curiousefficiency.org/posts/2014/08/python-4000....
    - 1st1 8y ago
      That's outdated info.
ssebastianj 8y ago
Relevant link: "PEP 563: Postponed Evaluation of Annotations" https://docs.python.org/3/whatsnew/3.7.html#pep-563-postponed-evaluation-of-annotations https://docs.python.org/3/whatsnew/3.7.html#pep-563-postpone...
- nerpderp83 8y ago
  If your macro isn't changing execution semantics, it probably doesn't need to be a macro. This is why (if needs to be a special form if your language is eager, but you want to have short circuit conditionals. If you language is lazy, lots of things DON'T need to be macros.