What is the output of `(lambda f: f(f))(lambda f: ‘called’)`?

Question

Python Professional — Hard

What is the output of `(lambda f: f(f))(lambda f: ‘called’)`?

Accepted Answer

The output of `(lambda f: f(f))(lambda f: 'called')` is 'called' because the inner lambda function is immediately called with itself as an argument, resulting in the string 'called'.