Method write

crates/vm/src/stdlib/_io.rs:2015–2042

(&self, obj: ArgBytesLike, vm: &VirtualMachine)

        #[pymethod]
        fn write(&self, obj: ArgBytesLike, vm: &VirtualMachine) -> PyResult<usize> {
            // Check if close() is in progress (Issue #31976)
            // If closing, wait for close() to complete by spinning until raw is closed.
            // Note: This spin-wait has no timeout because close() is expected to always
            // complete (flush + fd close).
            if self.writer().closing().load(Ordering::Acquire) {
                loop {
                    let raw = {
                        let data = self.writer().lock(vm)?;
                        match &data.raw {
                            Some(raw) => raw.to_owned(),
                            None => break, // detached
                        }
                    };
                    if file_closed(&raw, vm)? {
                        break;
                    }
                    // Yield to other threads
                    std::thread::yield_now();
                }
                return Err(vm.new_value_error("write to closed file"));
            }
            let mut data = self.writer().lock(vm)?;
            let raw = data.check_init(vm)?;
            ensure_unclosed(raw, "write to closed file", vm)?;

            data.write(obj, vm)
        }

        #[pymethod]
        fn flush(&self, vm: &VirtualMachine) -> PyResult<()> {