How to specify __init__.py while building a python library - python-3.x

Question

This is the first python library I am building. The folder structure looks like:
mylibrary
- build
- data
- docs
- environment.yml
- README.md
- license
- setup.py
- my library
- __init__.py
- Module1
- __init__.py
- module1_worklfow.py
- Module 2
- __init__.py
- module2_worklfow.py
On the init.py under "mylibrary" I have the statement from .Module1 import classfrommodule1workflow and from .Module2 import classfrommodule2workflow.
On the __init__ files that are inside the modules, I have from mylibrary.module1.module1_workflow import classfrommodule1workflow and the same for module2 init.
Now if I install the library through the conda command line with wheel, the library imports well. I am able to run in python from mylibrary import module1 but then if in the same command line I open a jupyter notebook, I am not able to import the library within jupyter. It says - no module named mylibrary.module1
I'm almost sure there's something wrong with my main init file, just can't figure out what it is.
EDIT: folder with files for MCVE here.
Steps on anaconda prompt:
cd folder_path
conda env create -f environment.yml
conda activate mylibrary
python setup.py bdist_wheel
pip install path_to_wheel
python
import mylibrary
import mylibrary.module1
quit()
This won't throw any errors, which is great! Then on the same command line:
jupyter notebook
then on the jupyter notebook:
import mylibrary
yields:
---------------------------------------------------------------------------
ModuleNotFoundError Traceback (most recent call last)
<ipython-input-1-8c582ad816fa> in <module>
----> 1 import mylibrary
ModuleNotFoundError: No module named 'mylibrary'
and
import mylibrary.module1
yields:
---------------------------------------------------------------------------
ModuleNotFoundError Traceback (most recent call last)
<ipython-input-2-64d831ac2965> in <module>
----> 1 import mylibrary.module1
ModuleNotFoundError: No module named 'mylibrary'
Here's an image for clarity:

Answer 1

Edit:
OK, I downloaded your code and it seems to be an issue with your setup.py after all. You forgot to add packages=find_packages(), to the argument list of setup, so the package you were installing was effectively empty. When import mylibrary was working for you when launching python from command line, it was probably because import also loads modules from current directory (try launching python from a different directory and check if it works).
By the way, you don't have to build a wheel if you just want to install from source. You can use pip install . or python setup.py install. Alternatively, for development purposes it's useful to do pip install --editable . or python setup.py develop.
Original answer:
Sounds like your package/library is OK but when you're launching jupyter notebook it's probably using a different interpreter. It should help to install jupyter in the conda environment. If it still doesn't work, you can try launching it with python -m jupyter notebook to ensure that you're using the same interpreter as for installing your package.