[AlxB]

Hello,
I am on ubuntu 20.04 Linux with Python 3.8.10 and OpenFOAM is v2112.
I believed a simple subprocess.call should allow to run a bash script from a python one. The python script is:

#!/usr/bin/env python3 

# -*- coding: utf-8 -*- 


import subprocess 

subprocess.call("./BashTest")

The BashTest script is:

#!/bin/sh 

cd "${0%/*}" || exit    # Run from this directory 

 . ${WM_PROJECT_DIR:?}/bin/tools/CleanFunctions  # Tutorial clean functions 



#--------------------------- 
 
cd case 

cleanCase0 

echo "BashTest " $(date +%s) > timeLog.txt

The bash script works from the terminal: the txt file is produced and the cleanfunction cleans what it has to.


The python script does not: the txt file is not produced. The cleaning is not done.

However if I remove line 3 of the bash script,

. ${WM_PROJECT_DIR:?}/bin/tools/CleanFunctions

, which refers to where the openfoam cleanfunctions are located, then the python script produces the txt file.

Therefore what could be wrong here ?


Many thanks in advance for your help.

[Hr_kules]

Hey, have you ever found a solution? I am stuck with the same problem

[crubio.abujas]

Can any of you describe more about the error message you got?

I've tried the code and works fine for me.

If the problematic line is this one

. ${WM_PROJECT_DIR:?}/bin/tools/CleanFunctions

It may happen that you dont have the openfoam environment loaded when launching the script. In that case you should get a "parameter not set or null" error on the command line. If you remove this line, the command cleanCase0 fails, but it continues the execution of the echo command, thus generating the file. You can avoid this behavior by appending " || exit" after the command, which terminate the execution if the command fails.

Try this code:

#!/bin/bash
cd "${0%/*}" || exit    # Run from this directory 

# Load the environment if not already loaded
if [ -z $WM_PROJECT_VERSION ]; then
    . /opt/OpenFOAM-v2012/etc/bashrc
fi

. ${WM_PROJECT_DIR:?}/bin/tools/CleanFunctions # Tutorial clean functions 

#-------------------------- 
 
cleanCase0 || exit

echo "BashTest " $(date +%s) > timeLog.txt

Hopes it help

[Hr_kules]

Hey Carlos,

this is exactly how i managed to solve the problem a few days ago!