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I have found a very simple patch.

First I have implemented this function:


import os

def isrealfile(file):
    """
    Test if file is on the os filesystem
    """
    
    if not hasattr(file, 'fileno'): return False

    try: tmp = os.dup(file.fileno())
    except: return False
    else: os.close(tmp); return True


Microsoft implementation of stdout/err/in when no console is
created (and when no pipes are used) actually are not 'real'
files.

Then I have added the following code in sitecustomize.py:


import sys

class NullStream:
    """
    A file like class that writes nothing
    """
    def close(self): pass
    def flush(self): pass
    def write(self, str): pass
    def writelines(self, sequence): pass

if not isrealfile(sys.__stdout__): 
   sys.stdout = NullStream()

if not isrealfile(sys.__stderr__):
   sys.stderr = NullStream()



I have tested the code only on Windows XP Pro.


P.S.
isrealfile could be added in os module.



Regards   Manlio Perillo