QuTiP 4.7.4: incompatibility with the latest scipy (1.12.0)

[knesterov]

qutip/qutip/parallel.py

Line 7 in f514961

from scipy import array

When the latest scipy version is used (1.12.0), QuTiP (4.7.4) cannot be imported since from scipy import array is no longer supported in scipy.

Code to reproduce the bug:
import qutip

Output:

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
Cell In[1], line 1
----> 1 import qutip

File ~/anaconda3/envs/test/lib/python3.11/site-packages/qutip/__init__.py:133
    131 # graphics
    132 from qutip.bloch import *
--> 133 from qutip.visualization import *
    134 from qutip.orbital import *
    135 from qutip.bloch3d import *

File ~/anaconda3/envs/test/lib/python3.11/site-packages/qutip/visualization.py:24
     22 from qutip.qobj import Qobj, isket
     23 from qutip.states import ket2dm
---> 24 from qutip.wigner import wigner
     25 from qutip.tensor import tensor
     26 from qutip.matplotlib_utilities import complex_phase_cmap

File ~/anaconda3/envs/test/lib/python3.11/site-packages/qutip/wigner.py:19
     17 import qutip
     18 from qutip import Qobj, ket2dm, jmat
---> 19 from qutip.parallel import parfor
     20 from qutip.cy.sparse_utils import _csr_get_diag
     21 from qutip.sparse import eigh

File ~/anaconda3/envs/test/lib/python3.11/site-packages/qutip/parallel.py:7
      1 """
      2 This function provides functions for parallel execution of loops and function
      3 mappings, using the builtin Python module multiprocessing.
      4 """
      5 __all__ = ['parfor', 'parallel_map', 'serial_map']
----> 7 from scipy import array
      8 import multiprocessing
      9 from functools import partial

ImportError: cannot import name 'array' from 'scipy' (/Users/konstantin/anaconda3/envs/test/lib/python3.11/site-packages/scipy/__init__.py)

[evmckinney9]

The deprecation warning from scipy==1.11 reads
DeprecationWarning: scipy.array is deprecated and will be removed in SciPy 2.0.0, use numpy.array instead.

However, clearly this functionality broke before that release; with some discussion here:

• scipy triggering experimental array_api import from numpy 2.0.dev scipy/scipy#19065 (comment)
• DEP: remove all deprecated scipy.<numpy-func> objects scipy/scipy#19067

[evmckinney9]

This commit, 1315742, already has removed from scipy import array from parallel.py. But it appears this commit is not included in the most recent releases of 4.7.X.

Edit:
The problem lies on this branch here: https://github.com/qutip/qutip/blob/qutip-4.7.X/qutip/parallel.py

[Ericgig]

Should be fixed with the 4.7.5 release.