CCDData.read Python 3.10 issue? (MAST SSLv3)

Description

When trying to open a URL with CCDData.read using python 10 I get the following error:

<urlopen error [SSL: SSLV3_ALERT_HANDSHAKE_FAILURE] sslv3 alert handshake failure (_ssl.c:997)>

When I downgraded to python 3.9, the same code works. I checked with python 3.7 and it works so it must have something to do with python 3.10.

Expected behavior

Load data without error.

Actual behavior

<urlopen error [SSL: SSLV3_ALERT_HANDSHAKE_FAILURE] sslv3 alert handshake failure (_ssl.c:997)>

Steps to Reproduce

1. Install astropy with python 3.10
2. import astropy with from astropy.nddata import CCDData
3. data = CCDData.read('https://archive.stsci.edu/pub/hlsp/frontier/abell2744/images/hst/v1.0/hlsp_frontier_hst_acs-60mas_abell2744_f435w_v1.0_drz.fits', cache=True)

Code:

from astropy.nddata import CCDData
data = CCDData.read('https://archive.stsci.edu/pub/hlsp/frontier/abell2744/images/hst/v1.0/hlsp_frontier_hst_acs-60mas_abell2744_f435w_v1.0_drz.fits', cache=True)

System Details

MacBook Big Sur running conda

[falkben]

Yes, this should be fixed now.

[tomdonaldson]

I am still able to reproduce the problem on my Mac. One thing I noticed is that after successfully doing the download with Python 3.9, the download is in astropy’s cache, so it would appear to succeed in Python 3.10 (though very quickly). If I set cache=False, then I still see the problem:

from astropy.nddata import CCDData
data = CCDData.read('https://archive.stsci.edu/pub/hlsp/frontier/abell2744/images/hst/v1.0/hlsp_frontier_hst_acs-60mas_abell2744_f435w_v1.0_drz.fits', cache=False)
print(data)