Thomas Ploch wrote: > Is it defined behaviour that all files get implicitly closed when not > assigning them? > > Like: > > def writeFile(fName, foo): > open(fName, 'w').write(process(foo)) > > compared to: > > > def writeFile(fName, foo): > fileobj = open(fName, 'w') > fileobj.write(process(foo)) > fileobj.close() > > Which one is the 'official' recommended way?
No such thing as an 'official' way. Nothing happens until the file object is garbage-collected. GC is generally not under your control. Common sense suggests that (a) when you are reading multiple files, you close each one explicitly (b) when you are writing a file, you close it explicitly as soon as you are done with it. That way you can trap any error condition and do something moderately sensible -- better than getting an error condition during GC when your Python process is shutting down. HTH, John -- http://mail.python.org/mailman/listinfo/python-list
