[Python-ideas] Re: [Feature] Body closure

On 2020-07-13 5:12 p.m., Joao S. O. Bueno wrote:

You know you can simply pass functions as parameters, right? def lock(func, *args):    # ...setup    result = func(*args)    #... teardown   return result.

And then, with 3 more lines you do a decorator out of that

def locked(func):     # <'lock' body as above>     return lock

in the end:

@locked def mythings():    # code that runs 'locked'    ...

On Mon, 13 Jul 2020 at 17:48, mailto:redradist@gmail.com> wrote:

Today I think about lambda in Python and what if we introduce the new syntax: ```python def lock(*args, closure):     # Do some stuff     closure() # Call closure     # Finish stuff

if __name__ == '__main__':     lock():         # Do some things here is thread safe ```

This feature could be very similar as in `Kotlin` inline functions https://kotlinlang.org/docs/reference/inline-functions.html

Or even better, a context manager from contextlib import contextmanager @contextmanager def lock(*args):     # Do some stuff     yield     # Finish stuff if __name__ == '__main__':     with lock():         # Do somethings here is thread safe It's even so interesting that I don't even need to implement the lock function; there's already the Lock class in the threading module