Unable to call python function using shell script

Question

I am using one shell script to call python function -

python -c 'import create_table; create_table.createTable()'

This script is in "scripts" directory and create_table.py file is in another directory - "cdk" Folder structure will look like this -

infra -> cdk -> create_table.py
      -> scripts -> run-script.sh

cdk and scripts directories are at same level inside infra directory.

When I am trying to run my script it is giving below error -

ModuleNotFoundError: No module named 'create_table'

I tried placing create_table.py file in scripts directory, but still it's giving same error. I am referring this question - Calling a Python function from a shell script Can anyone please help me out? Am I missing something here?

Update - create_table.py code

import boto3

def createTable():
    print("createTable function")

There is no class in this python file.

k.avinash · Accepted Answer · 2019-11-19 08:43:03Z

0

Your script and package are in different directories. You need to add __init__.py to your cdk. This will tell python it's a module. Then run python -c 'import ..cdk.create_table; create_table.createTable()

edited Nov 19, 2019 at 8:43

answered Nov 19, 2019 at 7:43

k.avinash

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2 Comments

Nitesh Over a year ago

Do I need to add anything in init.py file? And do I need to add two dots before cdk.create_table

k.avinash Over a year ago

__init.py__ is a empty file indicating directory will acts as module. You have to give relative or absolute path. Add .. while importing indicates it has to get out from scripts and go to cdk

Ahmed Abdelazim · Accepted Answer · 2019-11-19 09:07:55Z

0

Import the module in a correct way

also use createTable() directly NOT create_table.createTable()

python -c 'import sys; sys.path.insert(0, "../cdk"); from create_table import createTable; createTable()'

edited Nov 19, 2019 at 9:07

answered Nov 19, 2019 at 8:03

Ahmed Abdelazim

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13 Comments

Nitesh Over a year ago

There is no class in create_table.py file. So "from create_table import createTable; " will not work

Ahmed Abdelazim Over a year ago

@Nitesh You call the function. you did not import the whole file. I tested on my shell and create_table.createTable() gave an error while createTable() did not

Nitesh Over a year ago

I have added this line in my script - python -c 'import sys; sys.path.insert(0, "infra/cdk"); from create_table import createTable; createTable()' and it is giving this error - ModuleNotFoundError: No module named 'create_table'

Nitesh Over a year ago

Thanks for updating absolute path. I will try it and will let you know.

Ahmed Abdelazim Over a year ago

see the edit python -c 'import sys; sys.path.insert(0, "../cdk"); from create_table import createTable; createTable()'

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Michał Machnicki · Accepted Answer · 2019-11-19 10:42:51Z

0

Most likely you're running into problems because imports depend on the path from which you're calling the run-script.sh. A solution to this might be adding:

if __name__ == "__main__":
    createTable()

at the end of create_table.py and replacing the content of run-script.sh with:

#!/bin/bash
pth=`dirname $0`
python3 $pth/../cdk/create_table.py

After doing so you should be able run it from any path you want/need to.

answered Nov 19, 2019 at 10:42

Michał Machnicki

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