sim.runner.spectrum_integrated doesn't work when spectrum: integrated: interpolate_shells: > 0

[ycamacho]

Problem description

When interpolate_shells: > 0 in input yml file sim.runner.spectrum_integrated results in following error

---

AttributeError Traceback (most recent call last)
in ()
----> 1 sim24.runner.spectrum_integrated

/Users/yssavo/Documents/GitHub/tardis/tardis/montecarlo/base.py in spectrum_integrated(self)
233 if self._spectrum_integrated is None:
234 self._spectrum_integrated = self.integrator.calculate_spectrum(
--> 235 self.spectrum_frequency[:-1], **self.integrator_settings
236 )
237 return self._spectrum_integrated

/Users/yssavo/Documents/GitHub/tardis/tardis/montecarlo/formal_integral.py in calculate_spectrum(self, frequency, points, interpolate_shells, raises)
94 self.interpolate_shells = interpolate_shells
95 frequency = frequency.to("Hz", u.spectral())
---> 96 luminosity = u.Quantity(formal_integral(self, frequency, N), "erg") * (
97 frequency[1] - frequency[0]
98 )

/Users/yssavo/Documents/GitHub/tardis/tardis/montecarlo/montecarlo.pyx in tardis.montecarlo.montecarlo.formal_integral()

AttributeError: 'numpy.ndarray' object has no attribute 'values'

Expected Output

Formal integral should work when interpolate_shells: > 0

Issue is occurring because sim.runner.electron_densities_integ is a numpy array instead of a pandas series. Fix needs to occur in tardis/tardis/montecarlo/formal_integral.py line 253

[ycamacho]

@chvogl This issue seems to have occurred during your PR #1358

[chvogl]

Yes, this was a relatively stupid error on my part. Thanks for fixing it @Rodot. The problem should be resolved through the merge of PR #1464.

[chvogl]

I am closing this for now.