Install numpy and troubles

Nothing wrong but…

Once I needed in numpy package on my laptop. I try to install as normal pip package by python3 -m pip install numpy but unfortunatelly it generates errors like this:

% python3 -m pip install numpy
error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try brew install
    xyz, where xyz is the package you are trying to
    install.
    ... bla bla bla bla bla

Okay, said I, lets install by brew.

Brew and issues who comes from anniversary begins

Installing by brew will be without surprise things I. brew install numpy and it was enough? Yes, but after run the python and imported package I encount another one issue:

>>> import numpy as np
>>> np.matrix([[1,2],[3,4]])
Traceback (most recent call last):
  File "<python-input-1>", line 1, in <module>
    np.matrix([[1,2],[3,4]])
    ^^^^^^^^^
AttributeError: module 'numpy' has no attribute 'matrix'
>>> 
>>> dir(np)
['__doc__', '__file__', '__loader__', '__name__', '__package__', '__path__', '__spec__']
>>> np.matrix
Traceback (most recent call last):
  File "<python-input-2>", line 1, in <module>
    np.matrix
AttributeError: module 'numpy' has no attribute 'matrix'
>>> np.array
Traceback (most recent call last):
  File "<python-input-3>", line 1, in <module>
    np.array
AttributeError: module 'numpy' has no attribute 'array'
>>> np.dot
Traceback (most recent call last):
  File "<python-input-4>", line 1, in <module>
    np.dot
AttributeError: module 'numpy' has no attribute 'dot'
>>> np.__file__
>>> np.__name__
'numpy'
>>> np.__package__
'numpy'
>>> np.__path__
_NamespacePath(['/opt/homebrew/lib/python3.13/site-packages/numpy'])

After going to the install path I saw that each directory was empty!!! Crazy day. After googling I found some closed issue in brew github.

The final soultion was: brew link --overwrite numpy. Why since 2017 nobody haven’t fixed this part of broken code?!

Conclusions

If you’re installing something from system maintained package be sure that your installation is correct. Use overrides, like virtual env instead of brew.