Strange behavior

[Michal Nalevanko]

Hello,

I've just installed Python 3.5.1 on my computer and came across somewhat
strange behavior.

This is a snapshot of a short code that I wrote: https://goo.gl/izYbD0

Quite simple, you might say. Obviously, the program should create a new
text file, nothing else. But do you see the numbers it had added to the
output?

Is this behavior normal or am I overlooking something? Thank you very much
for your help.

Michal, Slovakia