Use subprocess.Popen and time.sleep

[chucky831]

Good morning everyone, I am new to Python. I am developing a script to automate a program I need at work. What I need to do via Python is simply open a program that is in the system. To do this I used subprocess.Popen()
The problem is that my script should not continue until the program has fully opened. How can I go about stopping the script? I have tried using time.sleep() but using this function seems to then fail to use subprocess.terminate() to close the program. Can you help me with this? Thanks