Calling a Python function from a shell script

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You can send the result of your functions to the standard output by asking the Python interpreter to print the result:

python -c 'import test; print test.get_foo()'

The -c option simply asks Python to execute some Python commands.

In order to store the result in a variable, you can therefore do:

RESULT_FOO=`python -c 'import test; print test.get_foo()'`

or, equivalently

RESULT=$(python -c 'import test; print test.get_foo()')

since backticks and $(…) evaluate a command and replace it by its output.

PS: Getting the result of each function requires parsing the configuration file each time, with this approach. This can be optimized by returning all the results in one go, with something like:

ALL_RESULTS=$(python -c 'import test; print test.get_foo(), test.get_bar()')

The results can then be split and put in different variables with

RESULT_BAR=$(echo $ALL_RESULTS | cut -d' ' -f2)

which takes the second result and puts it in RESULT_BAR for example (and similarly: -fn for result #n).

PPS: As Pablo Maurin mentioned, it would probably be easier to do everything in a single interpreter (Python, but maybe also the shell), if possible, instead of calculating variables in one program and using them in another one.

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