how do i check if a file exists with python?

[Moshe Zadka]

[Scott Hathaway, on how to find a file]
> Thanks for both responses!

Unfortunately, I think they did you more harm then good by telling you
the answer: I doubt you need it. Now, it may be that I'm wrong, in which
case just go ahead an use os.path.isfile, but if you're doing something
like

def foo():
	if os.path.isfile("foo"):
		return open("foo")
	else:
		return None

Or something to that effect, *don't*. It's evil, and will come back
to bite you (unreadable existing files, files changing between isfile
and open, etc.).

Instead, simple do:

def foo():
	try:
		return open("foo")
	except IOError:
		return None

In other words, don't try to avoid exceptions -- know where you want
to deal with them, and do so.
-- 
Moshe Zadka <sig at zadka.site.co.il>
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