What's the powerful and easy programming language of today and tomorrow?

Python is so easy to learn, and so powerful, that I find it difficult to imagine Python not fitting the bill for any of my backend needs.  So, I think that Python, and languages like it will dominate for a while.  That said, the process of creating documentation, debugging and maintaining code is still really difficult, and requires huge amounts of experience to do right.  I imagine that future languages (or newer versions of existing languages) will solve these problems.  Examples of add-ons that would make wriing programs easier/faster are: 1) automatic flowcharts - after multiple runs of a given program or set of programs, a flowchart is generated that shows how the various programs, functions, global variables, local variables, lists, etc. fit together in a format that is easy for a human to understand 2) auto reporting - when there is an error, providing the option to generate in detail logreports tracing an error back to the beginning of the entire run and showing where the error might have originated and why.  For example, if I get an error because a key is missing from a given dictionary, the reporting software would be able to compare the error to other runs of the program, and determine what it is about the errored input  that caused the error. 3) auto commenting - after multiple runs of a program or set of programs, perhaps this software could determine what a given function is doing, provide the appropriate comment, and provide the example inputs and outputs so that coders dont need to do that I realize that the points for improvement I describe above are not trivial to do, much less do right.  But I believe they are possible to achieve, and if done, could shave huge amounts of "unproductive" time from the average developer's day.

Haskell and Scala...they explore what is regarded as Functional Programming.