On Apr 13, 6:20 am, Michael Hoffman <[EMAIL PROTECTED]> wrote: > 7stud wrote: > > On Apr 13, 3:13 am, Michael Hoffman <[EMAIL PROTECTED]> wrote: > >> 7stud wrote: > >>> I assume all input is buffered by default, so I'm not sure how it > >>> explains things to say that input from sys.stdin is buffered. > >> The difference with sys.stdin is that it has indeterminate length until > >> you signal EOF. I believe you'd get the same problem reading from, say, > >> a named pipe. > > > Couldn't you say the same thing about a file you are iterating over? > > Only if the file has indeterminate length. Regular files have a length. > > >>>> This should be f = iter(raw_input,"") and this will end in a EOFError > >>>> and stop on blank line. So you need a wrapper > >>> Why a wrapper? > >> Because without a wrapper you'll get EOFError, while the file iterator > >> would ordinarily give you StopIteration. > > > Did you run my example? Did you get an error? I don't get an error. > > Yes I did. I did get an error. > > >>> lst = [] > >>> f = iter(raw_input, "") > >>> for line in f: > ... lst.append(line) > ... > abc > def > <Ctrl-D>Traceback (most recent call last): > File "<stdin>", line 1, in <module> > EOFError > -- > Michael Hoffman
But if you hit return on a blank line, there is no error. In other words, will stop on a blank line and not return EOFError. Anyway, it seems everyone is saying that when you iterate over a file, the whole file is first read into memory. Therefore iterating over sys.stdin is consistent: you have to type Ctrl+D to signal EOF before the iteration can start. Is that about right? -- http://mail.python.org/mailman/listinfo/python-list
