Run python command inside a bash script and get the result

Question

I would like to run a python command that return true or false inside a bash script:

#!/usr/bin/env bash

Some stuff...
boolean = $(python -c "bool(...operations...)")

The code above is just to sketch the idea. I need boolean to be false or true (bash boolean values) depending on the result of ...operations.... The code above is not working: boolean results to be an empty variable.

jeremysprofile · Accepted Answer · 2020-11-20 15:26:32Z

2

bool=$(python -c 'print(bool("abc"))') works as expected.

Note that this will return True or False not true or false (i.e., capitalized).

answered Nov 20, 2020 at 15:26

jeremysprofile

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Alok · Accepted Answer · 2024-03-11 09:25:28Z

1

xonsh shell should be useful for such mixing of bash and python

answered Mar 11, 2024 at 9:25

Alok

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Comments

gboffi · Accepted Answer · 2024-03-11 10:12:02Z

1

Bash has no preconception on boolean values, but if you need your bool to be either false or true, then you can use this snippet

bool=$(python -c 'print("true" if ...operations... else "false")')

E.G.,

$ for a in 4 5 ; do
>    bool=$(python -c 'print("true" if '$a' == 4 else "false")')
>    echo $bool
> done
true
false
$

answered Mar 11, 2024 at 10:12

gboffi

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