I am a Python programmer. I have toyed with functional languages (Scheme, SML) for many years. Over the time my code is becoming more and more functional, in every language I code in. Nevertheless, I do not plan to quit Python at all. Readability counts in my book and I do not see Clojure to be more readable than Python. Moreover, I am not considering F# since it is platform specific and I do not develop on Windows. In my experience Python is not losing programmers; perhaps 0.1% of them are moving to functional languages, but more are coming from C++, Java and even Ruby.