如何在Python中调用Rust异步方法？

use std::os::raw::c_char;
use std::ffi::CString;
use tokio::task;

#[no_mangle]
pub extern "C" fn rust_async_method(callback: extern "C" fn(*const c_char)) {
    task::spawn(async move {
        // 异步逻辑
        let result = "Hello from Rust async method!";
        let c_string = CString::new(result).expect("CString::new failed");
        let ptr = c_string.as_ptr();
        callback(ptr);
    });
}

$ cargo build --release

import cffi

ffi = cffi.FFI()

# 定义Rust异步方法的函数原型
ffi.cdef("""
    void rust_async_method(void (*callback)(const char*));
""")

# 加载Rust动态链接库
rust_lib = ffi.dlopen("./target/release/librust_async.so")

# 调用Rust异步方法
@ffi.callback("void(const char*)")
def callback(result):
    print(ffi.string(result).decode())

rust_lib.rust_async_method(callback)

# 保持Python进程运行，以便异步方法完成
import time
while True:
    time.sleep(1)