Packaging wont work if you add any other package dependency in your package

[unlucky-cat]

How to reproduce:

1. Add import numpy as np into your vector.py file and for example this dummy method into Vector2D class

 #vector.py
 import numpy as np
 ... 

 class Vector2D:
 ...
 def get_numpy_version(self):
 return np.__version__
 ...

2. run pip install -e .

you will get

# terminal output
(.venv) ...>pip install -e .
Obtaining .../VSCode/PythonProjectTemplate
 Installing build dependencies ... done
 Checking if build backend supports build_editable ... done
 Getting requirements to build editable ... error
 ,,,
 ModuleNotFoundError: No module named 'numpy'

you can fix this by making the following change int the pyproject.toml file, changing this

[tool.setuptools.dynamic]
version = {attr = "fastvector.__version__"}

to this

[tool.setuptools.dynamic]
version = {attr = "fastvector.version.__version__"}

OR

by adding Numpy to the build system dependencies

[build-system]
requires = [
 "setuptools",
 "setuptools-scm",
 "numpy",
]