On Mon, 07 Jan 2008 22:16:56 -0800, Russ P. wrote: > One second thought, I wonder if the reference counting mechanism would > be "smart" enough to automatically close the previous file on each > iteration of the outer loop. If so, the files don't need to be > explicitly closed.
Python guarantees[1] that files will be closed, but doesn't specify when they will be closed. I understand that Jython doesn't automatically close files until the program terminates, so even if you could rely on the ref counter to close the files in CPython, it won't be safe to do so in Jython. I don't know about IronPython or PyPy or the semi-mythical Parrot. Given how little effort it is to explicitly close the files yourself, I don't see any reason to not close them, rather than relying on an implementation-dependent feature. [1] Guarantee void under any circumstance that prevents files from being closed. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
