I'm running Ubuntu 14.04 LTS, and I cannot open the Ubuntu Software Center.  

I keep getting this error: 

```
    bash: /usr/bin/software-center: /usr/bin/python: bad interpreter: No such file or directory

```

I've noticed the change when I updated python to version 3.4.1, and can't figure out how to fix this problem. Can someone explain to me what I'm failing to understand?