what works with the with statement?

[BashBedlam]

is there a list of everything that works with the with statement? or, alternatively, everything that does not work with the with statement? i could not find anything at all, one way or the other, regarding how a particular function behaved, so i had to set up a test script.

What you can search for is "Context Manager". I think that you'll get more information that way. I can't tell you what does or does not qualify as a context manager but if you want to have some fun fooling around with the idea, you can roll your own. Try this:

from time import time

class Timer : # This is your context manager :)
	def __enter__ (self) :
		self.start = time ()
		return self

	def __exit__ (self, *args) :
		end = time ()
		self.interval = end - self.start


with Timer () as tracker:
	for count in range (99999) :
		print ('Still working...')

print(f'The loop took {tracker.interval:.3f} seconds.')