If you do not declare your ideology upfront you will still end up having one, only implicit and ad hoc.

This does not apply to Python, however. It does have a explicit, if not entirely serious, statement of its ideology in The Zen of Python. (For those unfamiliar, read http://c2.com/cgi/wiki?PythonPhilosophy. It has The Zen and some discussion.) Python takes its ideology pretty seriously, too, as evidenced by how much the words "pythonic" and "unpythonic" used in discussions involving the language. In discussions around, e.g., Java you will find no terms of that sort.