Why is the time wasted if you move on to Django? I'm sure the time won't be going to waste as you will become a better developer having been exposed to both.
The decision which to learn should be based on what your overall goals are. I am myself starting to learn python and will be moving towards learning Django. I don't see Django as the final solution to everything but its a solid start to being exposed to python and its web frameworks.
I have looked at Flask and Pyramid. Both seem quite good but at this moment I'm looking at learning a framework that will do a lot of heavy lifting for me. Django will do that better. Likely in about a year or more, I will be in a position to decide for myself based on my own experience whether getting into Flask or Pyramid would be a better idea for my projects.
Personally, I'd rather go to a restaurant and see the full buffet and sample the food that way (ie. Django) versus go in and pick niche items of the menu (ie. Flask).
I'm in the same position as the parent (grandparent?). I went through a bunch of django tutorials but felt that too much of it was "magic", so while everything worked out pretty well, I was never really sure why. I'm currently learning flask now because it still seems really easy while being more straightforward. I think that once I have actually written some stuff from scratch, I'll understand and appreciate a lot more of what is happening behind the scenes with django more.
learning is never a waste of time. even things that seem redundant are not really. seeing the same problem solved two different ways can offer a lot of insight into the nature of the problem and the trade offs of each solution.
