appsettings.py

from dateutil.relativedelta import relativedelta

try:
    from django.core.exceptions import ImproperlyConfigured

    try:
        from django.conf import settings

        EDTF = getattr(settings, "EDTF", {})
    except ImproperlyConfigured:
        EDTF = {}
except ImportError:
    EDTF = {}

SEASON_MONTHS_RANGE = EDTF.get(
    "SEASON_MONTHS_RANGE",
    {
        # season id: [earliest_month, last_month]
        21: [3, 5],
        22: [6, 8],
        23: [9, 11],
        # winter in the northern hemisphere wraps the end of the year, so
        # Winter 2010 could wrap into 2011.
        # For simplicity, we assume it falls at the end of the year, esp since the
        # spec says that sort order goes spring > summer > autumn > winter
        24: [12, 12],
    },
)

SEASON_L2_MONTHS_RANGE = EDTF.get(
    "SEASON_L2_MONTHS_RANGE",
    {
        # season id: [earliest_month, last_month]
        21: [3, 5],
        22: [6, 8],
        23: [9, 11],
        # winter in the northern hemisphere wraps the end of the year, so
        # Winter 2010 could wrap into 2011.
        # For simplicity, we assume it falls at the end of the year, esp since the
        # spec says that sort order goes spring > summer > autumn > winter
        24: [12, 12],
        # spring in the northern hemisphere
        25: [3, 5],
        # summer in the northern hemisphere
        26: [6, 8],
        # fall/autumn in the northern hemisphere
        27: [9, 11],
        # winter in the northern hemisphere wraps the end of the year
        28: [12, 12],
        # spring in the southern hemisphere
        29: [9, 11],
        # summer in the southern hemisphere
        30: [12, 12],
        # fall/autumn in the southern hemisphere
        31: [3, 5],
        # winter in the southern hemisphere
        32: [6, 8],
        33: [1, 3],
        34: [4, 6],
        35: [7, 9],
        36: [10, 12],
        37: [1, 4],
        38: [5, 8],
        39: [9, 12],
        40: [1, 6],
        41: [7, 12],
    },
)

DAY_FIRST = EDTF.get("DAY_FIRST", False)  # Americans!

SEASONS = EDTF.get(
    "SEASONS",
    {
        21: "spring",
        22: "summer",
        23: "autumn",
        24: "winter",
    },
)
INVERSE_SEASONS = EDTF.get("INVERSE_SEASONS", {v: k for k, v in SEASONS.items()})
# also need to interpret `fall`
INVERSE_SEASONS["fall"] = 23

# changing these will break tests
PADDING_DAY_PRECISION = EDTF.get("PADDING_DAY_PRECISION", relativedelta(days=1))
PADDING_MONTH_PRECISION = EDTF.get("PADDING_MONTH_PRECISION", relativedelta(months=1))
PADDING_YEAR_PRECISION = EDTF.get("PADDING_YEAR_PRECISION", relativedelta(years=1))
PADDING_SEASON_PRECISION = EDTF.get("PADDING_SEASON_PRECISION", relativedelta(weeks=12))
PADDING_DECADE_PRECISION = EDTF.get("PADDING_DECADE_PRECISION", relativedelta(years=10))
PADDING_CENTURY_PRECISION = EDTF.get(
    "PADDING_CENTURY_PRECISION", relativedelta(years=100)
)
PADDING_MILLENNIUM_PRECISION = EDTF.get(
    "PADDING_MILLENNIUM_PRECISION", relativedelta(years=1000)
)
MULTIPLIER_IF_UNCERTAIN = EDTF.get("MULTIPLIER_IF_UNCERTAIN", 1.0)
MULTIPLIER_IF_APPROXIMATE = EDTF.get("MULTIPLIER_IF_APPROXIMATE", 1.0)
MULTIPLIER_IF_BOTH = EDTF.get("MULTIPLIER_IF_BOTH", 2.0)
DELTA_IF_UNKNOWN = EDTF.get("DELTA_IF_UNKNOWN", relativedelta(years=10))

DEBUG_PYPARSING = False