尝试使用 asyncio 子进程调用 shell 命令时，Python 引发 NotImplementedError

Question

这个问题已经有答案了:

Why am I getting NotImplementedError with async and await on Windows? (5 个回答)

已关闭 14 天前。

我是 Python 编程新手。我想并行调用一些 shell 命令并将它们的结果累积在单个数组中，就像 javascript promise.all() 一样方法。

我的 Python 代码如下:

import asyncio
import os


commands = [
    'netstat -n | findstr 55601',
    'dir | findstr portMonitoring.py',
    'ssh 10.6.100.192 netstat'
]

async def job(cmd):
    # await asyncio.sleep(1)
    # return "HEE"
    # return os.popen(cmd).read()
    process = await asyncio.create_subprocess_exec(
        cmd, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE
    )

    return await process.communicate()



async def main():
    jobs = [job(cmd) for cmd in commands]
    done, pending = await asyncio.wait(jobs, return_when=asyncio.FIRST_COMPLETED)
    folders = []
    [folders.append(d.result()) for d in done]
    print("RESULT:", folders)

asyncio.run(main())

我收到以下错误:

Traceback (most recent call last):
  File "test.py", line 16, in job
    cmd, stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE
  File "C:\DEV\Python3.7.4\lib\asyncio\subprocess.py", line 217, in create_subprocess_exec
    stderr=stderr, **kwds)
  File "C:\DEV\Python3.7.4\lib\asyncio\base_events.py", line 1529, in subprocess_exec
    bufsize, **kwargs)
  File "C:\DEV\Python3.7.4\lib\asyncio\base_events.py", line 458, in _make_subprocess_transport
    raise NotImplementedError
NotImplementedError

Answer 1

https://github.com/python/cpython/blob/master/Lib/asyncio/base_events.py#L493

这是一个计划中的功能，但尚未实现。将来可以使用，但当前版本不支持。

我查看了其他分支，但都没有实现。 subprocess 模块 ( https://docs.python.org/3/library/subprocess.html ) 广为人知，并且对它的 asyncio 支持尚未完成。端点已定义，但目前无法使用。