Math's questions

I am writing a code but it has not worked as expected. A simplified version of the code is as follows:

from subprocess import call
import time

call([r"C:\Windows\System32\notepad.exe"])
time.sleep(5)
call(["taskkill", "/im", "notepad.exe"])

When running the script above, the code does not run from the first line call, that is, the script opens the notepad and waits for a response from call([r"C:\Windows\System32\notepad.exe"]), but this only happens when I manually close the notepad.

I would like the script to open the notepad, wait 5 seconds and close it, without manual user intervention. So how can I do it?

I have a structure in HashMap and I need to iterate through a for. How can I do this iteration?

My code:

import java.util.HashMap;
import java.util.Map;

public class Testeo {
    public static void main(String[] args) {
        Map<Integer, String> datos = new HashMap<>();
        datos.put(1, "uno");
        datos.put(2, "dos");
        datos.put(3, "tres");

        //necesito iterar aquí
    }
}

I need to call an executable that is in the same directory as a running python script . I need to know how I can call it through a command from my script with some parameters.

In the Windows command line, I do this:

miejecutable -p1 datos

Preferably if there is a way to run it in both Python 2 and 3.