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`SkyCoord == str` raises an error, instead of returning `False`

See original GitHub issue

Description

When doing an equality check between a SkyCoord and a str, an error is raised.

Expected behavior

Returns False.

Actual behavior

Raised an error.

Steps to Reproduce

from astropy import units as u
from astropy.coordinates import SkyCoord
c = SkyCoord(ra=10.625*u.degree, dec=41.2*u.degree, frame='icrs')
print(c == 'my_string')

Traceback (most recent call last):
  File "/Users/dstansby/github/sunpy/test.py", line 4, in <module>
    print(c == 'my_string')
  File "/Users/dstansby/miniconda3/envs/dev/lib/python3.9/site-packages/astropy/coordinates/sky_coordinate.py", line 368, in __eq__
    for attr in self._extra_frameattr_names | value._extra_frameattr_names:
AttributeError: 'str' object has no attribute '_extra_frameattr_names'

System Details

macOS-10.16-x86_64-i386-64bit Python 3.9.1 (default, Dec 11 2020, 06:28:49) [Clang 10.0.0 ] Numpy 1.19.3 astropy 4.2.1 Scipy 1.5.4 Matplotlib 3.4.1

Issue Analytics

State:
Created 2 years ago
Comments:7 (7 by maintainers)

Top GitHub Comments

1reaction

dstansbycommented, Apr 29, 2021

👍

0reactions

pllimcommented, Apr 29, 2021

@dstansby , since it is your idea, do you want to open a PR implementing https://github.com/astropy/astropy/issues/11661#issuecomment-829366618? 😸

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