trouble with select and tochild of Popen3 object

Richard Cook rcook at
Mon Feb 24 18:36:10 CET 2003

>  Richard Cook (rcook at wrote:
>>  Hi, the below code is supposed to open an ssh connection to a remote
>>  machine.  It has been set up so that username and password is not
>>  necessary for this connection, but often the ssh asks a yes/no
>>  question to which I always wish to answer yes.  The code below is
>>  supposed to wait until the tochild is writable and write 'yes' to it.
>>  what actually happens is written below.  Can anyone help me figure
>>  this one out?  Thanks.
>Why aren't you using expect? IIRC, there is a python-reimplementation of
>it called pyexpect, but the original expect would work.

Thanks for the hint.  I found pexpect and will probably use it for my 
project if it works.
Richard Cook  
Lawrence Livermore National Laboratory
Bldg-451 Rm-2043, Mail Stop L-561       
7000 East Avenue,  Livermore, CA, 94550, USA
phone (925) 423-9605 (work)    fax (925) 423-8704
Information Management & Graphics Grp., Services & Development Div., 
Integrated Computing & Communications Dept.
(opinions expressed herein are mine and not those of LLNL)

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