How to use bash variables inside a Python code?

Question

I wanna do this:

    import subprocess 
    subprocess.call(['var="foo_bar"'], shell=True)
    subprocess.call(['echo $var'], shell=True)

But when i will use the $var in the second line your value is losted.

Somebody know some say to solve this problem? This is a simple example, but a need to do that in a much more complex code here..

Tks..

Ignacio Vazquez-Abrams · Accepted Answer · 2011-05-26 17:48:53Z

12

Inject the value into the environment with os.environ.

os.environ['var'] = "foo_bar"
subprocess.call(['echo $var'], shell=True)

answered May 26, 2011 at 17:48

Ignacio Vazquez-Abrams

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1 Comment

Rosh Oxymoron Over a year ago

Also look at the env parameter to subprocess.Popen and subprocess.call.

user395760 · Accepted Answer · 2011-05-26 17:48:27Z

0

You can't. You can use enviroment variables (os.environ), and you can of course use everything you get passed as command line args (sys.argv), but bash variables are bash variables and not Python variables. You'll have to find another way (perhaps we could suggest a way if you told us what exactly you want to do).

answered May 26, 2011 at 17:48

user395760

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