Demonstration of decorator-abuse!

oneline-decorator.py

"""
Relevant PEPs:

- https://peps.python.org/pep-0572/
- https://peps.python.org/pep-0614/
"""

from functools import wraps

@lambda f: (
        wrapper := lambda *args, **kwargs: (
            print(f"Enter {f.__name__}"),
            ret := f(*args, **kwargs),
            print(f"Exit {f.__name__}"),
            ret
        )[-1],
        wraps(f)(wrapper)
)[-1]
def x(n):
    print(n)

x(1)