Dan <[EMAIL PROTECTED]> wrote: > Is this discouraged?: > > for line in open(filename): > <do something with line> > > That is, should I do this instead?: > > fileptr = open(filename) > for line in fileptr: > <do something with line> > fileptr.close()
One reason to use close() explicitly is to make sure that errors are reported properly. If you use close(), an error from the operating system will cause an exception at a well-defined point in your code. With the implicit close, an error will probably cause a message to be spewed to stderr and you might never know about it. If (as in your example) the file was open for reading only, errors from close() are unlikely. But I do not think they are guaranteed not to occur. If you were writing to the file, checking for errors on close() is indispensable. -M- -- http://mail.python.org/mailman/listinfo/python-list
