Sunset time calculation with swe.rise_trans broken

[vvasuki]

jd_sunset = swe.rise_trans(jd_start=2457753.5, body=swe.SUN, lon=13.09,
                             lat=80.27, rsmi=swe.CALC_SET | swe.BIT_DISC_CENTER)[1][0]

is returning 0 on my computer, which cannot possibly be the sunset time. And thereby leading to this problem: jyotisham/jyotisha#13 .

Could you please take a look?

PS: I installed the latest code with:

[~] 15:30:52$ sudo pip3 install git+https://github.com/astrorigin/pyswisseph@master -U
The directory '/home/vvasuki/.cache/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/home/vvasuki/.cache/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Collecting git+https://github.com/astrorigin/pyswisseph@master
  Cloning https://github.com/astrorigin/pyswisseph (to master) to /tmp/pip-csolktm6-build
Installing collected packages: pyswisseph
  Found existing installation: pyswisseph 2.0.0.post2
    Uninstalling pyswisseph-2.0.0.post2:
      Successfully uninstalled pyswisseph-2.0.0.post2
  Running setup.py install for pyswisseph ... done
Successfully installed pyswisseph-2.5.1.post0

[astrorigin]

Inspect the whole result:

jd_sunset = swe.rise_trans(jd_start=2457753.5, body=swe.SUN, lon=13.09,
... lat=80.27, rsmi=swe.CALC_SET | swe.BIT_DISC_CENTER)
jd_sunset
((-2,), (0.0, 2.695100435457e-312, 2.7874627029316465e-291, 1.818790777727e-311, 2.7874625367389016e-291, 9.766745e-317, 4.343725384106e-311, 5.2865984597206454e-303, 9.76668e-317, nan))

Function has returned (-2), object is circumpolar

By exchanging lon/lat you get:

jd_sunset = swe.rise_trans(jd_start=2457753.5, body=swe.SUN, lon=80.27,
... lat=13.09, rsmi=swe.CALC_SET | swe.BIT_DISC_CENTER)
jd_sunset
((0,), (2457754.015392543, 2.695100435457e-312, 2.7874627029316465e-291, 3.84528846805e-313, 2.7874625367389016e-291, 9.746423e-317, 4.343725384106e-311, 5.2865976774675737e-303, 9.7666284e-317, nan))

[vvasuki]

Oh! I was beyond the arctic circle!
Sorry for the false alarm. 🙏
Wouldn't it be better to raise an exception in such a case though?

[astrorigin]

http://www.astro.com/swisseph/swephprg.htm#_Toc471829085

Conforming to the docs, an exception/error is raised if returned result is (-1) (internal - calc or ephemeris error)

In my opinion you could raise an exception on your side if you find returned result[0][0]==-2

And double-check your input variables

[vvasuki]

OK, Thanks!