[Python] How to read the send command output in expect script

I have an expect script that will login to the remote server and execute a python script. In python script I have set sys.exit(1) for a certain condition so that it would stop execution when that condition is met. Is there way to know if python script stopped execution or ran fine?
(or) is there a way to read the output that python script produces (that is I would like to read output of send "python pythonscript.py arg1\r"). Any approach is fine. Please suggest ideas

expectscript.exp

#!/usr/bin/expect

eval spawn ssh -oStrictHostKeyChecking=no -oCheckHostIP=no user@******
expect "Password:"
send "password\r"
expect "$username$"
set prompt ":|#|\\\$"
set timeout -1
send "cd /Users/username/Documents/folder/\r"
send "python pythonscript.py arg1\r"
expect $prompt

Continue reading...