Well, of course, when you assume that the design criteria of Python are the correct ones you reach the conclusion that Python is the preferred language to use.

Well, of course, when you assume that the design criteria of Python are the correct ones you reach the conclusion that Python is the preferred language to use. However, even Python fails here. I would say it's "obvious" that you should use filter rather than the for/if combination. Perhaps to someone else it's "obvious" that you should use a list comprehension.