🐍⚙ Python Tricks — Nested functions Python allows functions to be defined inside other functions. These are called nested functions or inner functions. In this example, every time you call "speak", it defines a new inner function "whisper" and then calls it immediately after.

For more information about nested functions realpython.com/inner-function….

@realpython Wasn’t there a reasonable example? This makes no sense.

@realpython In general, one should avoid such nesting. One reason is that the return argument cannot be persisted easily (pickled), which makes parallel computing harder.

@realpython The example really doesn’t help understanding how nested functions could be helpful 😐