Using custom python library in notebook

Thanks for your responses.
To answer Srisakthi, yes the library is present:

And to Anonymous, i've tried the %pip list and my package isn't present.

Some additional info i can give is:

- I've created the package my self, based on een small set of python files. However, since the package does work when i install it through a notebook cell, I''ve concluded that the package isn't the issue.

This is the structure and one of the functions is the package:

This is the code i've used for the creation of the package:

from setuptools import find_packages, setup

setup(
    name='idpdemo',
    version='0.0.1',
    description='demo_description',
    author='Broeks',
    packages=find_packages(include=['idp']),
    install_requires=[],  # Add your dependencies here
    extras_require={
        'dev': ['pytest']  # Test dependencies go here
    }
)

And I've tried to import the function through the following code:

from idp import check_dataframe_for_duplicate_keys

If you need additional information, let me known.