$ python3 -Werror -c "import quantities"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/venv/lib/python3.9/site-packages/quantities/__init__.py", line 273, in <module>
    from . import quantity
  File "/tmp/venv/lib/python3.9/site-packages/quantities/quantity.py", line 10, in <module>
    from .dimensionality import Dimensionality, p_dict
  File "/tmp/venv/lib/python3.9/site-packages/quantities/dimensionality.py", line 333, in <module>
    p_dict[np.core.umath.clip] = _d_clip
  File "/tmp/venv/lib/python3.9/site-packages/numpy/core/__init__.py", line 31, in __getattr__
    _raise_warning(attr_name)
  File "/tmp/venv/lib/python3.9/site-packages/numpy/core/_utils.py", line 10, in _raise_warning
    warnings.warn(
DeprecationWarning: numpy.core is deprecated and has been renamed to numpy._core. The numpy._core namespace contains private NumPy internals and its use is discouraged, as NumPy internals can change without warning in any release. In practice, most real-world usage of numpy.core is to access functionality in the public NumPy API. If that is the case, use the public NumPy API. If not, you are using NumPy internals. If you would still like to access an internal attribute, use numpy._core.umath.