Hi Antel, thank you for your submission but this is not a bug. This is a bug tracker for reporting bugs, not a help desk to ask for help understanding code. There are many forums where you can ask for help, I suggest that you could try places like the Python-List mailing list or Reddit.

https://mail.python.org/mailman/listinfo/python-list

https://www.reddit.com/r/learnpython/


The three code snippets you show are all correct.

In the first case, you are comparing True != 3, which is True, and then testing whether True is in [3], which it is not.

In the second you compute (3 in [3]), which is True, then test True != True, which is False.

Lastly you do a *chained comparison* `True != 3 in [3]` which is equivalent to `(True != 3) and (3 in [3])` which is True.