GeoCanon

Global-Ready Django Apps From Day One

Jurisdictions. Dial Codes. Flags. Timezones. Holidays. Languages. One Package.

What is GeoCanon?

GeoCanon is a locale & jurisdiction toolkit for Django that gives your app global awareness out of the box.

Instead of hand-rolling country lists, phone validation, timezone lookups, and holiday calendars, you import one consistent library and ship internationally from your first deploy.

The Problem

# Scattered across your codebase...
COUNTRIES = [("US", "United States"), ...]  # hand-maintained
DIAL_CODES = {"+1": "US", ...}             # incomplete
TIMEZONE_MAP = {"US": "America/New_York"}   # 8 entries
# No holiday detection, no flag icons, no language defaults

The Solution

from geo_canon import (
    get_jurisdiction_choices,      # 190+ countries, sorted, translatable
    get_dial_code,                 # "Romania" → "+40"
    validate_phone,                # per-country regex validation
    get_flag_css_class,            # "Romania" → "fi-ro"
    get_current_local_time,        # "Romania" → aware datetime in Europe/Bucharest
    get_language_for_jurisdiction,  # "Romania" → "ro"
    format_duration,               # 3661 → "1 hour, 1 minute, 1 second"
)

# Optional: holiday detection
from geo_canon.holidays import is_public_holiday
is_public_holiday("Romania", date(2025, 12, 25))  # True

Quick Start

1. Install

# Core (zero non-Django dependencies)
pip install geocanon

# With optional extras
pip install geocanon[holidays]     # Public holiday detection
pip install geocanon[timezones]    # pytz fallback for Python <3.9
pip install geocanon[all]          # Everything

Available extras:

2. Configure (optional)

# settings.py — zero config required, but you CAN customise:
from geo_canon.settings import GeoCanonSettings

GEOCANON = GeoCanonSettings(
    default_jurisdiction="United Kingdom",
    default_language="en",
    timezone_overrides={"My Custom Region": "Europe/London"},
)

3. Use Anywhere

from geo_canon import get_dial_code, get_flag_css_class, get_current_local_time

# Phone dial codes
get_dial_code("Romania")       # "+40"
get_dial_code("United States") # "+1"

# Flag CSS classes (for flag-icons library)
get_flag_css_class("Romania")  # "fi-ro"

# Current local time
get_current_local_time("Japan")  # datetime in Asia/Tokyo

# Language defaults
from geo_canon import get_language_for_jurisdiction
get_language_for_jurisdiction("France")  # "fr"

# Duration formatting (i18n-aware)
from geo_canon import format_duration
format_duration(7200)  # "2 hours"

4. Django Forms

from geo_canon.jurisdictions.forms import JurisdictionContextSwitchForm

# Drop-in jurisdiction selector
form = JurisdictionContextSwitchForm()

5. Middleware

# settings.py
MIDDLEWARE = [
    ...
    "geo_canon.jurisdictions.middleware.JurisdictionMiddleware",
]

# Now every request has request.jurisdiction

Modules

Features

• 190+ jurisdictions — sorted, translatable, with O(1) lookups
• Phone validation — per-country regex patterns for national number formats
• Flag icons — CSS class mapping compatible with flag-icons
• 200+ timezones — uses zoneinfo (3.9+) with pytz fallback
• Holiday detection — powered by the battle-tested holidays library
• 75+ languages — ISO 639-1 choices with jurisdiction → language mapping
• Duration formatting — respects Django's active translation
• Jurisdiction middleware — automatic request.jurisdiction on every request
• Django form fields — drop-in JurisdictionChoiceField and context-switch form
• Pydantic settings — type-safe configuration with sensible defaults
• Rich exceptions — actionable error messages with hints and docs links
• Zero config — works with defaults, customise when you need to
• PEP 561 — py.typed marker for mypy/pyright

Why GeoCanon?

• One Source of Truth — no more scattered country lists and timezone dicts
• Production-Tested — extracted from a live Django platform serving multiple jurisdictions
• Translatable — all labels use gettext_lazy for full i18n support
• Minimal Dependencies — only Django required; extras are truly optional
• Type-Safe — Pydantic validation, type hints throughout, PEP 561 compliant
• Extensible — override timezones, holiday mappings, and more via settings

License

MIT — Because global-ready Django should be free.

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