[Tutor] Running a dos program with python

Wayne Werner waynejwerner at gmail.com
Wed Mar 10 23:59:52 CET 2010

On Wed, Mar 10, 2010 at 4:51 PM, Armstrong, Richard J. <
rarmstro at water.ca.gov> wrote:

> The dos program pops up and if I hit the enter key three times then it
> runs. How can I add these three “enters” into the script?

I'm not at all sure if this way would work, but you could send the \r\n
through a pipe:

p = subprocess.Popen([file1, file2, file3], stdin=subprocess.PIPE)
p.communicate("\r\n\r\n\r\n") # Three windows line ending sequences.

it also may be possible to add them to the end of the last parameter:

I don't have much faith that it will work, but you can certainly try!

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