Help with try and open 6.txt file and print as perfect or not

[nilamo]

Since you're using an archaic version of python, there's things you need to keep an eye on and change when you see them in code. For example, whenever someone says range(), you should use xrange() instead. Since that version of range lazily generates a sequence, it'll still work with massive ranges.

If you have a choice, you should move to a version of python that isn't about to leave it's bugfix maintenance cycle: https://pythonclock.org/