TypeError: 'MaskedQuantity' object with a scalar value is not iterable

[Paco-2000]

Hi,

I was trying to run the following code when I got this error message. It used to run just fine a couple of days ago but now it's giving me problems. Here's the relevant part of the code:

Normalize does not seem to be working like it used to. I also tried with flatten and it gave me the same issue.
The error message is very long, but at the end it says: TypeError: 'MaskedQuantity' object with a scalar value is not iterable

This used to work not even a week ago so I am quite perplexed that it doesn't anymore. Has anyone ran into a similar issue recently? Does anyone know how to fix this? Am I missing something?

Thank you for your time.

[Nschanche]

Hi, I just tried this and had no problem with the normalize function. Could you provide what version of Python/lightkurve/astropy/numpy you are using?

import sys; print("Python", sys.version)
import lightkurve as lk; print("lightkurve", lk.version)
import astropy; print("astropy", astropy.version)
import numpy as np; print("numpy", np.version)

[Paco-2000]

Hi,
Here are the versions that I'm using.

Thanks

[Paco-2000]

It seems that, on my end at least, this error only occurs with very specific light curves for some reason. It will not run if the flux's type is a MaskedQuantity. After trying out some different light curves for mu Eridani, it seems that only light curves from SPOC or TESS-SPOC have their fluxes as MaskedQuantities:

I haven't tested this with other stars. Does this happen to anyone else as well?

[Nschanche]

Thanks for that great breakdown. I've turned this comment into an issue we can look into more.

[Paco-2000]

Upgrading astropy to version 5.3 solved the issue for me. With version 5.3, it's able to take in the flux as a MaskedQuantity and normalize it as intended. SPOC and TESS-SPOC measurements still give flux values in MaskedQuantity as opposed to Quantity with other sources. Unsure if that's by design or not.

[JohaMR]

I'm dealing with the same error, but I can't upgrade the astropy version because a part of the code failed when using the latest version. I would like to know if there is any solution to the TypeError: 'MaskedQuantity' object with a scalar value is not iterable problem.

[Nschanche]

Hi @JohaMR, could you please post the full error message you are receiving so I can see exactly what line in normalize() is causing the issue? Also, can you include the versions of the packages you are working with? You can also take a look at #1280, which addresses this issue in a different context and may help find a temporary fix. We are looking more deeply into MaskedQuantity handling now, but do not have a fix built in just yet.