libaditya 0.3.1

Astrological calculation library for Adityas. It is capable of calculating using tropical zodiac, tropical adityas, or sidereal signs. It can do any ayanamsa for naskhatras, including tropcial/sidereal nakshatras, or both sidereal or both tropical (right now, Vedanga Jyotisha ayanamsa). It has basic HD calculations in it; will include more soon. see README for more information on trying it.

README

libaditya is an astrological calculation library meant to be easily understood in terms of what calculations are performed and how they are done.

there is a companion program pyphemeris which is meant to serve as an easily readable documentation on how the library works. Each function in libaditya itself is meant to return the requested data in a way that can then be presented in some way. Built into most libaditya classes are functions to represent themselves as text through repr (repr) and print, i.e., through __str__. pyphemeris makes use of these in order to print the requested data to stdout.

you can try pyphemeris by using uv to add it to your libaditya project:

uv add pyphemeris

Table of Contents

• Dependencies
• Installation
• Usage
• Configuration
• Options

Dependencies

automatically installed with uv

python, pyswisseph, python-prettytable

written with python 3.13

Installation

libaditya is now on pypi.org, so it can be installed with pip install libaditya...I think. I use Arch (btw) and they do python packages differently (I think?...Python packaging is strange), so I use virtual environments through uv.

In any case, at this point libaditya is not really mature enough to have a major version, so if you are interested in testing it out or changing it or working on it, I recommend installing is the following way, then you can pull changes as they come:

I recommend using uv to install libaditya. On MacOS, you can brew install uv

git clone https://gitlab.com/j0sh4rp3/libaditya

uv venv
source .venv/bin/activate
uv add . --dev

then, 1) if you dont change any of the code at all, then you can do git pull, and it should update from the gitlab repo. 2) if you make changes to libaditya, im not really sure with how that would work in git from getting updates from libaditya and your own...

Usage

then you can go into the Python repl using python

then

>>> from libaditya import *
>>> dir()
['Chart', 'Chiron', 'Circle', 'Cusp', 'Cusps', 'Earth', 'EphContext', 'Jaimini', 'JulianDay', 'Jupiter', 'Ketu', 'Location', 'Longitude', 'Mars', 'Mercury', 'Moon', 'Nakshatra', 'Nakshatras', 'Names', 'Neptune', 'Panchanga', 'Planet', 'Planets', 'Pluto', 'PrettyTable', 'Rahu', 'Rashi', 'Saturn', 'Self', 'Sign', 'Signs', 'Sun', 'Uranus', 'Varga', 'Venus', 'Yamakoti', '__annotations__', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', 'base_path', 'calc', 'calc_current', 'calc_vdasha', 'calculate_vimshottari_dasha', 'cardinal_points', 'chart', 'charts', 'const', 'constants', 'context', 'current_vimshottari_dasha', 'cusps', 'get_next_lord', 'jaimini', 'julian_day', 'kala', 'length', 'location', 'longitude', 'lord', 'lunar_new_year', 'nakshatras', 'next_dasha_lords', 'objects', 'os', 'panchanga', 'pathlib', 'pd', 'planet_dict', 'planets', 'print_calculated_vimshottari_dasha', 'print_cardinal_points', 'print_functions', 'print_next_dasha_level', 'print_vimshottari_dasha', 'printf', 'read', 'replace', 'signs', 'swe', 'utils', 'vargas', 'vimshottari']

you can then use help(), e.g.:

>>> help(Chart)

and this will print info for Chart. I am trying to add documentation to each of these classes and function so that there is something helpuful printed. Basically all values have defaults, so you can also do this

>>> c=Chart()
>>> dir(c)

to see all of what Chart has and can do.

Most of this is meant to be self explanatory. The one thing I need to document better is how to input information. It is through EphContext, from libaditya.objects.context. It takes a JulianDay and a Location, then a bunch of options. All of these have defaults that should a chart for the current time more or less.

You can read a .chtk file into the repl like this:

>>> context = read.chtk_to_context(infile)

this returns an EphContext that you can then use to instantiated a Chart.

An EphContext also includes all the options for the chart.

Sidereal

Sidereal is possible, but here is how you must do it to get meaningful results: three options must be set:

sysflg=const.SID     # indicates sidereal ecliptic
ayanamsa=98          # this shouldnt be the default, but it is; Lahiri - 1; True Citra - 27; any
                     # swisseph ayanamsa
circle=Circle.ZODIAC # circle starts where the zodiac starts; with Circle.ADITYA, it
                     # doesnt start where the "zodiac" starts, i.e., ecltipic longitude doesn't line up to
                     # where the zodiac starts; if you dont change this, it might be
                     # confusing!

Read a .chtk file

this is the most useful for getting birth information without needing to do it manually

jhcontext = read.chtk_to_context("josh.cht")
jhchart = Chart(jhcontext)

to change any of the options, do like this:

jhsiderealcontext =
replace(jhcontext,sysflg=const.SID,ayanamsa=27,circle=Circle.ZODIAC,print_outer_planets=False)

this keeps everything else the same same, and changes what you specified to what you specified

jhdsidchart = Chart(jhsiderealcontext)

using tab completion is a good way to explore: type

>>> jhchart.

then tab twice, and you will see a list:

>>> jhchart.
jhchart.context     jhchart.get_varga(  jhchart.jaimini()   jhchart.rashi()  

actualy it will look different now you should see something like jhchart.sidereal() you can use that to get a sidereal version of that chart. Default ayanamsa is 27. Ayanamsa are swiss ephemeris values, which will be elsewhere in this documentation eventually. Also, 98 for Dhruva GC mid-Mula, 99 for Ecliptic Vedanga Jyotisha and 100 for Equatorial Vedanga Jyotisha Ayanamsa can be set by calling

jhchart.sidereal(ayanamsa=18)

if you working mostly with a sidereal chart, you can assign it to a variable

sidchart = jhchart.sidereal(ayanamsa=25)

then for the tropical or aditya versions of that chart, you could

sidchart.tropical()
sidchart.aditya().rashi()

a Chart is basically a collection of Vargas. The Rashi is the most important. You can access it through Chart.rashi()

if you assign is to a variable while in the repl:

>>> rashi=jhchart.rashi()

then you can use tab completion of, dir():

>>> dir(rashi)
['__class__', '__delattr__', '__dict__', '__dir__', '__doc__', '__eq__', '__firstlineno__', '__format__', '__ge__', '__getattribute__', '__getstate__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__module__', '__ne__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__static_attributes__', '__str__', '__subclasshook__', '__weakref__', '_amsha', '_cusps', '_get_pada', '_planets', '_rashi_planets', '_signs', 'akriti_yogas', 'amsha', 'argala', 'bandhana_yogas', 'chart', 'context', 'cusps', 'dignities', 'draw_sun_by_sign_table', 'init_cusps', 'init_planets', 'jaimini_first_strength', 'lagna', 'mkheader', 'pada', 'padas', 'planets', 'signs', 'sysflgstr', 'upapada', 'varga_name', 'where_is']

everything surrounded by "__" is a special Python method. The ones without any underscores are the methods that "Rashi" has, things you can know about the rashi at hand.

e.g.,

>>> rashi.lagna()

self.sign()=8 viṣṇu
+--------+-------------------+----------------+
| Object | In Sign Longitude | Real Longitude |
+--------+-------------------+----------------+
| Cusp 1 |          12:59:45 |        192.996 |
+--------+-------------------+----------------+

The functions of the Classes themselves give the information in some way, and then there is a separate part that prints. Most of these have in-built printing methods due to Python, so that is why we can look at them to here. But to use them in a different application, we need to understand the data is returned, so we can read it and use it is whichever way we need at some time.

Dignity example

for example

>>> rashi.dignities()
['GF', 'N', 'GF', 'OH', 'EX', 'N', 'MT']

>>> help(rashi.dignities)

you will see a help screen where you can read

dignities() -> [<class 'str'>]
    return a list of dignities in the natural order
    Sun, Moon, Mars, Mercury, Jupiter, Venus, Saturn

so is returns a list of strings "EX", "DB", "GF", etc. for all the dignities of the planets in normal Vedic order. So that is the data; it is use to you how to find it.

in libaditya.printf (which you should be able to use as printf if you did from libaditya import *), there are print functions for some things.

for example

printf.print_dignity_table(chart.rashi().dignities())

you can get a varga with .varga(n)

get dignities in the navamsha

printf.print_dignity_table(chart.varga(9).dignities())

to find the chara karakas

printf.print_jaimini_karakas(chart.rashi().planets().jaimini_karakas())

so then you can find the AK in the d9

ak = chart.rashi().planets().jaimini_karakas()[0]

Planets.jaimini_karakas() return a list of Planet classes. So if the AK is Venus, then ak would the Venus class of the Venus of the Rashi chart.

get svamsha

svamsha = chart.varga(9).signs()[ak.sign()]

Varga.signs() returns a dictionary, where the keys are integers 1-12, which correspond to signs 1-12. This is true regardless of the system we are using. The system is set by the sysflg and by the circle=Circle. sysflg can be tropical or sidereal (footnote: some others that aren't well implemeneted yet, e.g., helio, bary, draconic, true sidereal) circle=Circle.ZODIAC or circle=Circle.ADITYA. In the former, sign 1 = Aries (whether tropical or sidereal). In the later, sign 1 = Dhata, which is at 330 tropical ecliptic longitude.

This takes care of all necessary tropical, Aditya, sidereal calculations.

When accessed through Chart() all of these works as given by the EphContext parameters sysflg and circle with the options as just explained, and of course ayanamsa.

To see all the options in EphContext:

help(EphContext)

Vargas

Vargas can be accessed using Chart.varga(n).

If n is positive, the corresponding parivritti varga of that number will be produced.

Other vargas will have negative numbers to indicate them. Here are the vargas currently implemeneted:

-2 Hora
-3 Drekkana
-4 Chaturthamsha
-10 Dashamsha
-100 Dashamsha with Even Rashis going in reverse
-12 Dvadashamsha
-16 Shodashamsha
-20 Vimshamsha
-24 Parashara Chaturvimshamsha
-240 Siddhamsha
-27 Bhamsha
-40 Khdavedamsha
-45 Akshavedamsha
-60 Shashtyamsha