NUMPY 1.20 above error: TypeError: expected dtype object, got 'numpy.dtype[float64]'

[pinghongyeh]

Hi Rutger,

I have encounterd errors while running NODDI_mod_watson.fit,

Here is the error

NODDI_fit_watson = NODDI_mod_watson.fit(gtab_dmipy, data, mask=mask)
File "/home/yehp/anaconda3/lib/python3.7/site-packages/dmipy/core/modeling_framework.py", line 1201, in fit
self, self.scheme, x0_, Ns, N_sphere_samples)
File "/home/yehp/anaconda3/lib/python3.7/site-packages/dmipy/optimizers/brute2fine.py", line 76, in init
model, x0_vector_, Ns, N_sphere_samples)
File "/home/yehp/anaconda3/lib/python3.7/site-packages/dmipy/optimizers/brute2fine.py", line 168, in precompute_signal_grid
self.acquisition_scheme, self.parameter_grid)
File "/home/yehp/anaconda3/lib/python3.7/site-packages/dmipy/core/modeling_framework.py", line 1300, in simulate_signal
E_2d[i] = self(acquisition_scheme, **parameters)
File "/home/yehp/anaconda3/lib/python3.7/site-packages/dmipy/core/modeling_framework.py", line 1370, in call
acquisition_scheme_or_vertices, **parameters))
File "/home/yehp/anaconda3/lib/python3.7/site-packages/dmipy/distributions/distribute_models.py", line 390, in call
return self.sh_convolved_model(acquisition_scheme, **kwargs)
File "/home/yehp/anaconda3/lib/python3.7/site-packages/dmipy/distributions/distribute_models.py", line 482, in sh_convolved_model
**distribution_parameters)
File "/home/yehp/anaconda3/lib/python3.7/site-packages/dmipy/distributions/distributions.py", line 149, in spherical_harmonics_representation
watson_sf = self(hemisphere.vertices, mu=mu, odi=odi)
File "/home/yehp/anaconda3/lib/python3.7/site-packages/dmipy/distributions/distributions.py", line 123, in call
mu_cart = utils.unitsphere2cart_1d(mu)
TypeError: expected dtype object, got 'numpy.dtype[float64]'

I have numpy=1.21.1 installed. The scripts ran fine using numpy< 1.18.0
It seems that API change in numpy has caused this issue, see
numba/numba#6041

I wonder if you plan to upgrade dmipy for the current version of numpy.

Thank you.
Ping