It seems that PyPy is not being actively developed anymore and is phased out even by numpy (numpy/numpy#30416). There's no official statement from the project, but the numpy issue is from a PyPy developer. I added a warning to avoid users assuming PyPy properly supported and developed Python distribution.
The language is pure, lazy, and has no loops. Every iteration is recursion, and recursion costs stack frames. Since Nix 2.20, the evaluator caps call depth at 10,000 (configurable via max-call-depth, but the default is what you'll hit). Before 2.20, the limit was whatever your OS allocated for the process stack: non-deterministic across machines, occasionally baffling to debug. Tail-call optimization would help. There's even a FIXME comment in ExprApp::eval() acknowledging it. But the evaluator's structure (a local variable that stays live across the recursive eval call) prevents the tail position from being optimized, and nobody has restructured the code. Tvix, the Rust-based evaluator, handles TCO in many cases. The reference C++ evaluator doesn't.
，详情可参考新收录的资料
Поединок, прошедший 27 февраля в Санкт-Петербурге, завершился победой «Зенита» со счетом 1:0. Успех сине-бело-голубым принес гол Луиса Энрике в концовке второго тайма.
Get our breaking news email, free app or daily news podcast
- Update MSRV to 1.91 ([#17677](astral-sh/uv#17677))