Auto input answer for a terminal command within python script

Question

I made a python script in which it runs a specified terminal command.

def main(my_list):
    for item in my_list:
        os.system("myCmd -s {0}".format(item))

    item_list = ['itemA', 'itemB', 'itemC']
    main(item_list)

As the terminal command I am trying to use does not accepts a list in the -s argument, which is the reason that I make it into a python script. While running the script, it works but I notice that it will prompts me with the following question: Are you sure you want to continue (y/n)?

This means I will need to punch in the y on my keyboard, 3 times in the above example. But in the event if my list is huge, and should I not be on my desk, is there any way that I can script to make it accept 'y' as my answer, without me to press anything on the keyboard?

Juan Cortés · Accepted Answer · 2017-03-29 21:42:31Z

1

You'd need to use a pipe, that way you can actually write to that pipe an answer, don't forget to close the pipe once you're done with it.

p = os.popen("myCmd -s {0}".format(item), "w")
p.write("y\n")

popen documentation

edited Mar 29, 2017 at 21:42

answered Mar 29, 2017 at 21:30

Juan Cortés

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1 Comment

Juan Cortés Over a year ago

Glad I could help @dissidia

Ricardo Branco · Accepted Answer · 2017-03-29 21:28:55Z

1

Use the pexpect module. It's basically expect used in shell scripts, for Python.

answered Mar 29, 2017 at 21:28

Ricardo Branco

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1 Comment

dissidia Over a year ago

I did not get a chance to test this as it appears I need to install it. But I'm sure it works as well!

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