How to use python to start an interactive shell program?

Question

I have used python subprocess and os module for a while. Now I want to start an interactive C++ program called dumbCalculator from python. This dumbCalculator simply read my input and return its result: when I type 1+2 it returns 3

How can I use my python script to call this dumbCalculator binary? apparently, when dumbCalculator starts, python need to 'give up' its shell.

Any comments?

Thanks a lot!

Take a look at the subprocess module

msvalkon
– msvalkon

2014-03-21 14:05:41 +00:00
Commented Mar 21, 2014 at 14:05 — msvalkon
– msvalkon, Commented Mar 21, 2014 at 14:05

Kevin · Accepted Answer · 2014-03-21 16:51:22Z

4

Either of these two commands will run an interactive program for you and return to Python when the program ends. They will not necessarily return a value from that program. 'bc' is an interactive calculator for testing. It will let you add numbers and then return to Python when you type 'quit'.

>>> os.system("bc")

>>> subprocess.call("bc")

answered Mar 21, 2014 at 16:51

Kevin

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2 Comments

salezica Over a year ago

+1, also check out the python-sh project if it gets any more complex than this.

larsks Over a year ago

Links are nice. I think you mean this python-sh, but please correct me if this is the wrong one.

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