Cannot import a python file within the same directory.

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Hello

I have two scripts: caller.py and test_lib.py. I want to import test_lib.py in the caller.py to use some of the functions there. The files work perfectly when run normally:

python3 caller.py

However, when I call it using rosrun:

rosrun my_package caller.py

I get the following error

ModuleNotFoundError: No module named 'test_lib'

When I remove the import line, the program run without errors

Both scripts are in the same folder (scripts). Here they are:

caller.py

#!/usr/bin/env python 

import test_lib

if __name__ == "__main__":
     test_lib.test1()

test_lib.py

def test1():
    print('test')