Because it's an old article. Admittedly, there's no easy way to know this, because it has no date, but believe me, it's been around for ages. At the very least, it predates the silly str.join method (and new-style classes and string methods altogether).
However, before that, there was the string module, which had the join() function. This article probably relates to it in some way; I think that either it predates string.join (I'm not sure when that was added to Python, but it's been around since at least 1.4), or it clarifies how it was implemented.
The author is Guido van Rossum, by the way (another thing that isn't mentioned in the article).
However, before that, there was the string module, which had the join() function. This article probably relates to it in some way; I think that either it predates string.join (I'm not sure when that was added to Python, but it's been around since at least 1.4), or it clarifies how it was implemented.
The author is Guido van Rossum, by the way (another thing that isn't mentioned in the article).