Execute sh in subdirectory from main.py script?

Question

I am trying to do the following thing. I have a python project with this dir-tree:

Project dir
  |
  |___main.py
  |___module
       |
       |__a.py
       |__a.sh

a.py has a class with a method that runs the script:

class A():
    def run():
        os.system('a.sh')

And a.sh creates a file:

touch a.txt

And main.py instantiates an object of class A and calls run() :

a = A()
a.run()

When main is called, I get an error saying that the script a.sh is not found . I get why that happens, it's because the working dir is equal to the project root path, but how can I make it work so that the file created ends up in the root path?

I want to call main.py and end up with this configuration.

Project dir
  |
  |___a.txt
  |___main.py
  |___module
       |
       |__a.py
       |__a.sh

I could replace the call to a.sh in a.py to

os.system('module/a.sh')

And it would work, but it does not look clean to me.

Answer 1

Code in the a.py module can extract the name of the directory it is in and use that in the os.system() call. This is what I mean:

File a.py :

import os

class A():
    def run(self):
        my_directory = os.path.dirname(__file__)
        script_path = os.path.join(my_directory, 'a.sh')
        os.system(script_path)

a = A()
a.run()