Plase read the docs for the dir function before it's source code, before complaining so loud. Direct quote "Note Because dir() is supplied primarily as a convenience for use at an interactive prompt, it tries to supply an interesting set of names more than it tries to supply a rigorously or consistently defined set of names, and its detailed behavior may change across releases. For example, metaclass attributes are not in the result list when the argument is a class."
The ticket was also closed by the author as it what pretty much determined to be a "won't fix".