The missing slide: profiling. I love functional programming. Nonetheless, I strongly believe in using the natural idioms of your language: they are more widely

The missing slide: profiling. I love functional programming. Nonetheless, I strongly believe in using the natural idioms of your language: they are more widely used, more widely optimized, and more often thought about. I think you would find that the functional style is not idiomatic in Python most of the time. This can hurt readability, performance, and interoperability. Overall, I would encourage people to do what is natural -- it is often also what's correct. For example, Python generators expressions are lazy sequence semantic constructions and are both functional in semantics and better than the equivalent map/reduce semantics.