Just to clarify, I don't mean your article is bad or incomplete -- quite the contrary, I enjoyed it a lot. Generators are one of my favorite Python features and they're kind of underused, mostly because people simply don't know about them.

A couple more along the same lines:

- Metaclasses and type. (This is admittedly dark magic, but useful in library code, less so in application code)

- Magic methods! Everyone knows about __init__, but you can override all sorts of behaviors (see: https://docs.python.org/3/reference/datamodel.html)

My favorite example (I have a lot of favorite examples :)) is __call__, which emulates function calling and is the equivalent of C++'s operator().

Why is it my favorite? Because as the old adage goes, "a class is a poor man's closure, a closure is a poor man's class":

  class C:
      def __init__(self, x):
          self.x = x
      def __call__(self, y):
          return self.x + y
 
  >>> a = C(2)
  >>> a(3)
  5