I disagree with map/filter/reduce being "key" in Python. I've been writing Python for a long time and I never use them. Comprehensions are more pythonic than map+filter, and reduce just doesn't come up. Here's Guido explaining why he wanted to move all three functions out of builtins in Python 3:
Reduce got banished to functools, but map and filter are still around. So people can process collections using the lispy style if they like. I just hope they realize that it's only a difference in style.