如何使用子进程库在顶级python文件中使用命令行参数调用其他python文件？

Question

So essentially I have 15 or so scripts that can connect to various networking devices using an SSH library. I want to create one top-level python file that can run other python scripts so the user can decide which scripts they want to run. I have been advised to use the subprocess library and this seems to make the most sense for what I want to do. It is important to note that my python scripts contain command-line argparse arguments for it to run, for example:

 python reboot_server.py -deviceIP 172.1.1.1 -deviceUsername admin -devicePassword myPassword

So far I have created a top-level python file that is set up to call two python scripts to start with that the user can enter. However, when I run the program and select one of the options I get a "SyntaxError:invalid syntax" Traceback. This happens right when I enter my first argument, which is the device IP address

import subprocess
import os
import sys

def runMain():

    scriptName = os.path.basename(__file__)

    print("The name of this script: " + scriptName + "\n")

    while True:
        optionPrinter()

        user_input = input("Please select an option for which your heart desires...\n")

        switch_result = mySwitch(user_input)

        if switch_result == "our_Switch":
            deviceIP = str(input("Enter the IP address for the device"))
            deviceUsername = str(input("Enter the username for the device"))
            devicePassword = str(input("Enter the password for the device"))

            subprocess.call(['python', 'our_Switch.py', deviceIP, deviceUsername, devicePassword])

        elif switch_result == "San_test":
            deviceIP = str(input("Enter the IP address for the device"))
            deviceUsername = str(input("Enter the username for the device"))
            devicePassword = str(input("Enter the password for the device"))

            subprocess.call(['python', 'San_test.py', deviceIP, deviceUsername, devicePassword])

        else:
            print("Exiting the program now, have a great day !\n")
            sys.exit(-1)

Here is the Traceback:

Traceback (most recent call last):
  File "C:/myFolder/src/top_level.py", line 57, in <module>
    runMain()
  File "C:/myFolder/src/top_level.py", line 39, in runMain
    deviceIP = str(input("Enter the IP address for the device"))
  File "<string>", line 1
    172.28.6.21
           ^
SyntaxError: invalid syntax

Keep in mind that all the scripts that I'm trying to call is in the same source file. Also it is important to note that I have tested each script I have written and they are all fully working. Am I using subprocess.call() right ? How can I fix this issue ? Thanks for the help!

Answer 1

You are using python2. In python2, input not only takes input, it evaluates it as python code. Obviously an IP address is not valid python code. Hence the syntax error.

For python2 you should be using raw_input - and you can drop the str .

deviceIP = raw_input("Enter the IP address for the device")

Or you can switch to python3