If that were the sole reason, it should have been fixed when introducing Python 3. It seems to be much less controversial than other breaking changes in Python

If that were the sole reason, it should have been fixed when introducing Python 3. It seems to be much less controversial than other breaking changes in Python 3. I think the more important reason is that Python doesn't really have an emphasis on the boolean type in general. The `if` statement works for every type, in contrast to other languages allowing only the boolean type in `if`. It is very common to use `if string_or_number_or_anything: blah blah` in Python. While I won't make a stance whether this is a good thing or not, it is still awkward that Python allows implicit conversion between `bool` and `int`.