detect interactivity

[Roald de Vries]

On Dec 29, 2009, at 8:34 PM, Dave Angel wrote:
> Antoine Pitrou wrote:
>> Le Tue, 29 Dec 2009 16:09:58 +0100, Roald de Vries a écrit :
>>
>>
>>> Dear all,
>>>
>>> Is it possible for a Python script to detect whether it is running
>>> interactively? It can be useful for e.g. defining functions that are
>>> only useful in interactive mode.
>>>
>>
>> Try the isatty() method (*) on e.g. stdin:
>>
>> $ python -c "import sys; print sys.stdin.isatty()"
>> True
>> $ echo "" | python -c "import sys; print sys.stdin.isatty()"
>> False
>>
> Your test determines whether input is redirected.  But I think the  
> OP was asking how to detect whether the script was being run from an  
> interpreter prompt.

That was my question indeed. Is it possible?