Executing a subprocess fails

Question

I tried to call a process via Python with several arguments. Executing the batch file itself works fine for me but translating it into Python makes me scream. Here the conte

Answer 1

First, you don't need all those quotes. So remove them. You only need quotes around parameters that have a filename when that filename has a space (stupidly, Windows does this often).

Your parameters are simply a list of strings, some of which need quotes. Because Windows uses non-standard \ for a path separator, use "raw" strings for these names.

params = [
    r'"C:\Program Files\Systems\Emb Work 5.4\arm\bin\mpr.dll"',
    r'"C:\Program Files\Systems\Emb Work 5.4\arm\bin\ajl.dll"',
    r'"C:\Documents and Settings\USER\Desktop\abc.out"',
    "--backend",
    "-B", 
    "--endian=little",
    "--cpu=Cortex",
    "--fpu=None",
    "-p",
    r'"C:\Program Files\unknown\abc.ddf"',
    "--drv_verify_download",
    "--semihosting",
    "--device=STM32F10xxB",
    "-d",
    "jjftk",
    "--drv_communication=USB0",
    "--speed=auto",
    "--initial_speed=32",
    "--reset_strategy=0,0"]

Use something like

program = r'"C:\Program Files\Systems\Emb Work 5.4\common\bin\run"'
subprocess.Popen( [program]+params )