I am new to programming and i decided to learn Python first, so;
I installed Python, latest version 3.4. and I am trying to open Python IDLE(GUI) mode, so when I open I get message "IDLE's subprocess didn't make connection. Either IDLE can't start or personal firewall software is blocking connection.". 
My firewall is not problem beacuse I put Python throught it. I also tried to reinstall it and it didnt made diffirence. So please if somenone can help! 
Thank you on your time :D
Simple...rename your .py file with some name different from any keyword name like 'random.py' which already exists in python package.
Eg. I named one file as "random.py". The same error popped up. I renamed it to "random_demo.py". It worked.
The different naming discards the problem of ambiguity between an already existing file and a newly created file with same name.
Python error - IDLE's subprocess didn't make connection. Either IDLE can't start or personal firewall software is blocking connection