To call a Python script from Bash in Linux, first create the script (e.g., python_script.py). Use a text editor like vi or nano. The Python script should import sys for command-line arguments. Then, create a Bash script (e.g., run_pyscript.sh) with ‘#!\/bin\/bash’ and a line to execute the Python script with arguments. Make the Bash script executable using ‘chmod +x’ and run it with ‘.\/run_pyscript.sh arg1 arg2’.<\/em><\/p>\n<\/blockquote>\n\n\n\n Also read<\/strong><\/em>: How to Uninstall Python 3.7 from Ubuntu<\/em><\/strong><\/a><\/p>\n\n\n\n You can create a Python script by using any of the text editors\u2014for example, nano, vi.<\/p>\n\n\n This command opens the vi text editor.<\/p>\n\n\n Alternatively, use this command for the nano text editor.<\/p>\n\n\n\n Here we are simply creating a Python script using the vi text editor.<\/p>\n\n\n\n After entering your code, press ‘Esc’<\/strong> to exit insert mode. To save and exit type ‘:wq!’<\/strong> and press ‘Enter’<\/strong>. This writes the changes to the file and quits the editor. <\/p>\n\n\n\n ‘import sys<\/strong>‘ this import sys<\/strong> module, which provides access to some variables used by the interpreter and functions that interact with the interpreter. ‘sys.argv<\/strong>‘, contains command line arguments passed to the script. ‘sys.argv[]<\/strong>‘, by using this the subsequent elements are the arguments provided when running the script. ‘float<\/strong>‘, converts the value into floating point number and assign it to the respective variable as num1 and num2. The last line simply prints the sum.<\/p>\n\n\n\n Here we create a bash script using vi named run_pyscript.sh<\/p>\n\n\n We create a bash script named run_pyscript.sh and pass the argument as python3 followed by the Python file name.<\/p>\n\n\n\n ‘python3 <\/strong>‘calls the python3 interpreter. ‘python_script.py<\/strong>‘ is the name of the Python script to be executed. You can replace this with the actual name of your Python script. “$1”<\/strong> and “$2”<\/strong> are positional arguments or command-line arguments passed to the Bash script and represent the first and second arguments respectively. <\/p>\n\n\n\n Now press ‘Esc’<\/strong> to exit insert mode. To save and exit type ‘:wq!’<\/strong> and press ‘Enter’<\/strong>. This writes the changes to the file and quits the editor. <\/p>\n\n\n\n This command is used in the Unix\/Linux operating system. ‘chmod<\/strong>‘ is used to change mode, it is used to change the permissions of a file. ‘+x<\/strong>‘, adds the execute permission to the file. ‘run_pyscript.sh<\/strong>‘ is the name of the Bash script file for which we want to change the permission. <\/p>\n\n\n\n Replace arg1 and arg2 with the desired values you want to pass as arguments to your Python script. ‘.\/run_pyscript.sh<\/strong>‘ executes the Bash script with values 2 and 3. Gives output as the sum of 2 and 3 which is 5. Similarly, you can pass arguments to a Python script from the command line.<\/p>\n\n\n\nHow to Call a Python Script from Bash<\/h2>\n\n\n\n
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\nvi python_script.py\n<\/pre><\/div>\n\n\n
\nnano python_script.py\n<\/pre><\/div>\n\n\n
![\"Vi](\"https:\/\/www.askpython.com\/wp-content\/uploads\/2023\/12\/vi_command.png\")
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\nimport sys\nnum1 = float(sys.argv[1])\nnum2 = float(sys.argv[2])\n\nresult = num1 + num2 \nprint(f"The sum is: {result}")\n<\/pre><\/div>\n\n\n![\"Python](\"https:\/\/www.askpython.com\/wp-content\/uploads\/2023\/12\/python_add.png\")
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\nvi run_pyscript.sh\n<\/pre><\/div>\n\n\n
\n#!bin\/bash\n\npython3 python_script.py "$1" "$2"\n<\/pre><\/div>\n\n\n
![\"Bash](\"https:\/\/www.askpython.com\/wp-content\/uploads\/2023\/12\/bash_script.png\")
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\nchmod +x run_pyscript.sh\n<\/pre><\/div>\n\n\n
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\n.\/run_pyscript.sh arg1 arg2\n<\/pre><\/div>\n\n\n
Here in this example, we pass values as 2 and 3.<\/p>\n\n\n\n![\"Run](\"https:\/\/www.askpython.com\/wp-content\/uploads\/2023\/12\/run_bash_command.png\")
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