pohualli 0.2.3

Python port (in progress) of the Turbo Pascal Pohualli calendrical utility

Pohualli (Python Port)

Python reimplementation of the original Turbo Pascal Pohualli calendrical utility.

Highlights

• Maya & Aztec core calculations (Tzolk'in, Haab, Long Count, Year Bearer)
• 819‑day cycle, planetary synodic helpers, zodiac & moon heuristics
• Correlation ("New Era") presets + on-the-fly overrides
• Auto-derivation of correction offsets from partial constraints
• Unified composite API & high-coverage test suite (≥90% per file)
• FastAPI web UI + CLI + JSON output

Install

pip install pohualli

PyPI page: https://pypi.org/project/pohualli/

Structure

.
├── CHANGELOG.md                 # Project changelog / release notes
├── LICENSE                      # GPL-3.0-only license text
├── README.md                    # Overview & usage (this file)
├── docker-compose.yml           # Convenience orchestration for web app
├── Dockerfile                   # Multi-arch container build definition
├── mkdocs.yml                   # MkDocs Material documentation config
├── pyproject.toml               # Packaging & dependency metadata
├── docs/                        # Documentation markdown sources (MkDocs)
│   ├── index.md                 # Landing page
│   ├── dev.md                   # Development & contributing notes
│   ├── license.md               # License blurb for docs site
│   ├── concepts/                # Conceptual explanations
│   │   ├── calendars.md         # Calendar systems overview
│   │   └── configuration.md     # Correlations & correction parameters
│   └── usage/                   # How-to guides
│       ├── quickstart.md        # Quick installation & first run
│       ├── cli.md               # CLI usage details
│       └── python-api.md        # Python API examples
├── pohualli/
│   ├── __init__.py              # Public API exports (compute_composite, etc.)
│   ├── autocorr.py              # Derive correction offsets from constraints
│   ├── aztec.py                 # Aztec (Tonalpohualli) name tables & helpers
│   ├── calendar_dates.py        # Gregorian/Julian conversions & weekday calc
│   ├── cli.py                   # Command line interface entry point
│   ├── composite.py             # High-level composite computation orchestrator
│   ├── correlations.py          # Correlation (New Era) preset definitions
│   ├── cycle819.py              # 819‑day cycle station & direction colors
│   ├── maya.py                  # Core Maya calendar math (Tzolk'in / Haab / LC)
│   ├── moon.py                  # Moon phase / anomaly heuristics
│   ├── planets.py               # Planetary synodic value helpers
│   ├── templates/
│   │   └── index.html           # Web UI Jinja2 template
│   ├── types.py                 # Dataclasses & global correction state types
│   ├── webapp.py                # FastAPI application factory / routes
│   ├── yearbear.py              # Year Bearer packing/unpacking utilities
│   └── zodiac.py                # Star & earth zodiac angle computations
└── tests/                       # Pytest suite (≥90% per-file coverage)
  ├── test_autocorr*.py        # Auto-correction derivation tests
  ├── test_calendar*.py        # Calendar date conversion edge cases
  ├── test_cli*.py             # CLI command & JSON output coverage
  ├── test_cycle_planets.py    # 819-cycle & planetary helpers
  ├── test_extra_cycles_yearbear_moon.py  # Mixed composite cycle branches
  ├── test_maya*.py            # Maya calendar arithmetic & validation
  ├── test_moon_zodiac.py      # Moon + zodiac computations
  ├── test_web*.py             # FastAPI endpoint & template rendering
  ├── test_yearbear_cli.py     # Year bearer & related CLI paths
  └── test_zodiac_extra.py     # Additional zodiac heuristic coverage

Python Usage

from pohualli import compute_composite
result = compute_composite(2451545)
print(result.tzolkin_name, result.long_count, result.star_zodiac_name)

CLI Examples

# Basic human-readable conversion
pohualli from-jdn 2451545

# Year Bearer reference override
pohualli from-jdn 2451545 --year-bearer-ref 0 0

# JSON output (pretty with jq)
pohualli from-jdn 2451545 --json | jq .long_count

# Override New Era just for this invocation
pohualli from-jdn 2451545 --new-era 584283 --json

# Apply a named correlation preset globally
pohualli apply-correlation gmt-584283

# List available correlations
pohualli list-correlations

# Derive corrections from partial constraint (tzolkin only)
pohualli derive-autocorr 2451545 --tzolkin "4 Ahau"

# Derive with multiple constraints (tzolkin + haab + g)
pohualli derive-autocorr 2451545 --tzolkin "4 Ahau" --haab "3 Pop" --g 5

# Persist and restore configuration
pohualli save-config config.json
pohualli load-config config.json

# Full JSON composite into a file
pohualli from-jdn 2451545 --json > composite.json

Web App

uvicorn pohualli.webapp:app --reload

Open http://127.0.0.1:8000

Docker

docker build -t pohualli .
docker run --rm -p 8000:8000 pohualli

Or use the published image:

docker run --rm -p 8000:8000 ghcr.io/muscariello/pohualli-python:latest

Testing

pytest -q

License

GPL-3.0-only

Reference

Sołtysiak, A. & Lebeuf, A. (2011). Pohualli 1.01. A computer simulation of Mesoamerican calendar systems. 8(49), 165–168. ResearchGate