对变量使用subprocess.call

Question

I'm creating a routine which I will setup as a scheduled task in Windows to automatically take a copy of our database and post it to a Web Server for downloads by our customers.

I've gotten everything working using static strings in the arguments for the subprocess call which uses 7-zip to create a self-extracting archive. However, when I tried to make the logic a little more agnostic by using os.path.join and os.path.dirname to dynamically determine argument values for the subprocess.call function, things stopped working.

I can't figure out what's wrong because when I run it in the cmd console providing static strings as the arguments it works fine. Additionally, it works fine through Python when I use static strings. It's only when I introduce the variables and functions into the arguments to try and dynamically determine the argument values and no error codes or messages are provided.

# Get the Database location
localGDB = os.path.join(os.path.dirname(__file__), r"Resources\MyDatabase.gdb")

# Wrap the local File Geodatabase into a self-extracting exe
print "Wrapping local database..."
try:
    subprocess.Popen([str(os.path.join(os.path.dirname(__file__), r"Resources\7z\7-Zip64\7z.exe")),
                    "a",
                    "-sfx",
                    str(os.path.join(os.path.dirname(__file__), "MyDatabase.exe")),
                    str(localGDB)])
except Exception as e:
    ctypes.windll.user32.MessageBoxA(0, "An error occured while wrapping the database." + e.message, "ERROR", 0 | 0x10)
    sys.exit(1)

Answer 1

如果在Windows上，我建议运行subprocess.check_output()

Answer 2

Thanks Everyone. After taking tdelaney's advice to check the paths, I found that the 7zip path was incorrect.