如何使用带有多个创建标志的 subprocess.Popen？

Question

I'm trying to execute a node command on the shell, and I need python not to wait until node is closed before moving on to the next line of code, so I use the creation flag: CREATE_NEW_CONSOLE , but I also want the window not to show up on screen, so I'd like to use CREATE_NO_WINDOW too. The name seems to indicate more than one can be used, and in fact the docs say:

creationflags, if given, can be one or more of the following flags: CREATE_NEW_CONSOLE

CREATE_NEW_PROCESS_GROUP

ABOVE_NORMAL_PRIORITY_CLASS

BELOW_NORMAL_PRIORITY_CLASS

HIGH_PRIORITY_CLASS

IDLE_PRIORITY_CLASS

NORMAL_PRIORITY_CLASS

REALTIME_PRIORITY_CLASS

CREATE_NO_WINDOW

DETACHED_PROCESS

CREATE_DEFAULT_ERROR_MODE

CREATE_BREAKAWAY_FROM_JOB

But I can't find a way to use more than one at once. If I try with a tuple or a list it gives an error saying: CreateProcess() argument 6 must be int, not tuple . I also couldn't find any examples of Popen being used with more than one creationflag.

Is there simply no way to call this with both flags? If not, how can I achieve my purpose of detaching the process and also not having an ugly black window show up on the screen?

My code:

def inicializar_API_biblia():
    pathApiBibliaLocal = r'C:\\Users\\adassa\Desktop\\Programacao\\api-biblia\\index.js'
    pid = subprocess.Popen(['node', pathApiBibliaLocal],
          creationflags=(subprocess.CREATE_NO_WINDOW, subprocess.CREATE_NEW_CONSOLE)).pid

Answer 1

I need python not to wait until node is closed before moving on to the next line of code

Such modifications should not be necessary, as subprocess.Popen doesn't wait until the subprocess finishes before moving on.

Regarding the remainder of the question, you need to use the bitwise-or | operator to combine the flags, as in CREATE_NO_WINDOW | CREATE_NEW_CONSOLE CREATE_NO_WINDOW | CREATE_NEW_CONSOLE . Note that it's possible that that particular combination doesn't make sense. (The fact that one or more flags may be specified doesn't imply that all combinations are meaningful.)