您是对的-没有很好的API。您也说对了第二点-设计一个使用线程为您执行此操作的函数非常容易。
import threading
import subprocess
def popen_and_call(on_exit, popen_args):
"""
Runs the given args in a subprocess.Popen, and then calls the function
on_exit when the subprocess completes.
on_exit is a callable object, and popen_args is a list/tuple of args that
would give to subprocess.Popen.
"""
def run_in_thread(on_exit, popen_args):
proc = subprocess.Popen(*popen_args)
proc.wait()
on_exit()
return
thread = threading.Thread(target=run_in_thread, args=(on_exit, popen_args))
thread.start()
# returns immediately after the thread starts
return thread
甚至线程在Python中都非常容易，但是请注意，如果on_exit（）的计算量很大，则需要将其放在单独的进程中，而不是使用多处理（这样GIL不会降低程序速度）。这实际上非常简单- 您基本上可以将所有调用替换为threading.Thread，multiprocessing.Process因为它们遵循（几乎）相同的API。
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