[pywin32-bugs] [ pywin32-Bugs-1655517 ] PeekNamedPipe returning "Invalid Handle"

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Bugs item #1655517, was opened at 2007-02-09 07:40
Message generated for change (Comment added) made by mhammond
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Category: win32
Group: None
>Status: Closed
>Resolution: Invalid
Priority: 5
Private: No
Submitted By: joshua_benuck (some_guy_coding)
Assigned to: Nobody/Anonymous (nobody)
Summary: PeekNamedPipe returning "Invalid Handle"

Initial Comment:
Using the following program:
import win32api
import win32pipe

if __name__ == "__main__":
    pipe = win32api.GetStdHandle(win32api.STD_INPUT_HANDLE)
    buffer, bytesToRead, result = win32pipe.PeekNamedPipe(pipe, 1)

on a Windows XP Professional machine. Running Python 2.5 and build 210 of the win32all installer yields this error message:

Traceback (most recent call last):
  File "in.py", line 6, in <module>
    buffer, bytesToRead, result = win32pipe.PeekNamedPipe(pipe, 1)
pywintypes.error: (6, 'PeekNamedPipe', 'The handle is invalid.')

Is this expected? If it is, how would I go about querying the standard input to see if there is any data waiting?

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>Comment By: Mark Hammond (mhammond)
Date: 2007-02-09 10:55

Message:
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Originator: NO

I'm afraid this is just a question about Windows itself and not related to
pywin32.  I'd suggest either mailing the pyt...@py... mailing
list, or searching beyond the Python community to see how a C based program
would achieve what you want directly via win32 - it will then be trivial to
use that technique using pywin32.

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Comment By: Roger Upole (rupole)
Date: 2007-02-09 10:46

Message:
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Console handles won't work with the named pipe functions.
You can use the win32console module to check std input.
 
import win32console
cb=win32console.PyConsoleScreenBufferType(pipe)
if cb.PeekConsoleInput(1)
   ...

         Roger


        Roger




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