sys.stdin and re.search

[John Machin]

"Jimmie Fulton" <jimmie-dated-1043474834.7879b0 at illumid.com> wrote in message news:<pan.2003.01.20.06.24.23.588538 at illumid.com>...
> I'm unable to get any matches with re in a loop when the file I'm looping
> over is stdin.  When I use open(), it works fine.  Any hints?
> 
> Sample Non-working code...

This works for me. What version of Python are you using? What platform
[at least specify (*x / Mac / Windows)]? Are you piping into stdin or
are you typing?

I suggest that you insert this statement immediately after the "while
line:":
   print "'line' is", repr(line)
That way you can verify that you are actually getting input, and you
can see what the search() has to work on.

> pattern = re.compile(r"(\b[\d]{1,3}\.[\d]{1,3}\.[\d]{1,3}\.[\d]{1,3}\b)")

You don't need those square brackets, it will still work without them.

> Sample Working code...
> file = open('myfile','r')

Not a good trick on Python 2.2 (2.1??) or later; you have just nobbled
the built-in file() function.

Oh, and by the way, did you by some mischance actually have stdout
instead of stdin in your code??? sys.stdout.readline() returns ''
immediately and you would get the symptoms you describe.