Piping data into script under Win32

[runes]

You being so sure about what you were saying, was what I needed.
Thanks!

Under Windows, I'm used to rely on the PATHEXT env. variable, so I
typically don't write "python scriptname.py args", but just "scriptname
args".

So:
type countlines.py | python countlines.py = Success
type countlines.py | countlines.py = Failure

Why doesn't the latter work?

Traceback:
F:\groks>type countlines.py | countlines.py
The process tried to write to a nonexistent pipe.
Traceback (most recent call last):
  File "C:\groks\countlines.py", line 2, in ?
    data = sys.stdin.readlines()
IOError: [Errno 9] Bad file descriptor