I've found it to be incredibly helpful to emulate having a library installed on my system rather than depending on my local directory path to pick up my file edits. To do this in a python project where you've defined a `setup.py`, you can specify the command `develop`.
First uninstall whatever version of your `library` you have.
```bash
pip uninstall library
```
Then in your folder with the `setup.py` run the following command
```bash
python setup.py develop
```
This will then create a symlink from your site-packages directory to the directory in which your code lives.