使用 N 个参数运行 subprocess.popen

Question

subprocess.popen invokes process in background.

I am invoking php process and sometimes python process, and every time arguments may be different. I want to write one function and in that I will pass list of arguments. And that function will execute process based on the arguments.

So what I am doing is, written below and it was bad way actually and I don't want to write so many lines.

    def RunBackGroundProcess(args):
        # args is an array of params
        # index 0 - command - php/python or anyother
        # index 1 - filename - that you want to run. Specify fullpath if required
        # index 2 - param_1
        # index 3 - param_2
        # index N - param_N

        if(len(args) == 2):
            subprocess.Popen([args[0], args[1], args[2]])

        if(len(args) == 3):
            subprocess.Popen([args[0], args[1], args[2], args[3]])

        if(len(args) == 4):
            subprocess.Popen([args[0], args[1], args[2], args[3], args[4]])

What about if I have 10 arguments or 15 arguments? This is bad way, right? Help me to write this code in smaller lines.

Answer 1

you are passing args as list, So while subprocess.Popen() no need to check argument length you can just pass as it is to subprocess

def RunBackGroundProcess(args):
    subprocess.Popen(args)

This will work