Auto-indent problematic with python

There is a problem in the code problem space. When you are doing python exercises and you type on tab key, the next line will be considered with a "\t" like the previous and that causes a compilation failure.

The next picture explains the problem. The line with "x-=1" is produced with a "\n" from the previous line.

So, you have to delete all spaces from line beginning and do a manual tab.