Updated kodi settings on Lenovo

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2026-03-22 22:28:43 +01:00
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Copyright 2021 Chris Smith
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<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<addon id="script.module.arrow" name="arrow" version="1.2.3" provider-name="Chris Smith">
<requires>
<import addon="xbmc.python" version="3.0.0" />
<import addon="script.module.dateutil" version="2.8.2" />
<import addon="script.module.typing_extensions" version="4.7.1" />
</requires>
<extension point="xbmc.python.module" library="lib" />
<extension point="xbmc.addon.metadata">
<summary lang="en_GB">Better dates and times for Python</summary>
<description lang="en_GB">Better dates and times for Python</description>
<license>Apache-2.0</license>
<platform>all</platform>
<website>https://arrow.readthedocs.io/en/latest/</website>
<source>https://github.com/arrow-py/arrow</source>
<assets>
<icon>resources/icon.png</icon>
</assets>
</extension>
</addon>

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from ._version import __version__
from .api import get, now, utcnow
from .arrow import Arrow
from .factory import ArrowFactory
from .formatter import (
FORMAT_ATOM,
FORMAT_COOKIE,
FORMAT_RFC822,
FORMAT_RFC850,
FORMAT_RFC1036,
FORMAT_RFC1123,
FORMAT_RFC2822,
FORMAT_RFC3339,
FORMAT_RSS,
FORMAT_W3C,
)
from .parser import ParserError
# https://mypy.readthedocs.io/en/stable/command_line.html#cmdoption-mypy-no-implicit-reexport
# Mypy with --strict or --no-implicit-reexport requires an explicit reexport.
__all__ = [
"__version__",
"get",
"now",
"utcnow",
"Arrow",
"ArrowFactory",
"FORMAT_ATOM",
"FORMAT_COOKIE",
"FORMAT_RFC822",
"FORMAT_RFC850",
"FORMAT_RFC1036",
"FORMAT_RFC1123",
"FORMAT_RFC2822",
"FORMAT_RFC3339",
"FORMAT_RSS",
"FORMAT_W3C",
"ParserError",
]

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__version__ = "1.2.3"

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"""
Provides the default implementation of :class:`ArrowFactory <arrow.factory.ArrowFactory>`
methods for use as a module API.
"""
from datetime import date, datetime
from datetime import tzinfo as dt_tzinfo
from time import struct_time
from typing import Any, List, Optional, Tuple, Type, Union, overload
from arrow.arrow import TZ_EXPR, Arrow
from arrow.constants import DEFAULT_LOCALE
from arrow.factory import ArrowFactory
# internal default factory.
_factory = ArrowFactory()
# TODO: Use Positional Only Argument (https://www.python.org/dev/peps/pep-0570/)
# after Python 3.7 deprecation
@overload
def get(
*,
locale: str = DEFAULT_LOCALE,
tzinfo: Optional[TZ_EXPR] = None,
normalize_whitespace: bool = False,
) -> Arrow:
... # pragma: no cover
@overload
def get(
*args: int,
locale: str = DEFAULT_LOCALE,
tzinfo: Optional[TZ_EXPR] = None,
normalize_whitespace: bool = False,
) -> Arrow:
... # pragma: no cover
@overload
def get(
__obj: Union[
Arrow,
datetime,
date,
struct_time,
dt_tzinfo,
int,
float,
str,
Tuple[int, int, int],
],
*,
locale: str = DEFAULT_LOCALE,
tzinfo: Optional[TZ_EXPR] = None,
normalize_whitespace: bool = False,
) -> Arrow:
... # pragma: no cover
@overload
def get(
__arg1: Union[datetime, date],
__arg2: TZ_EXPR,
*,
locale: str = DEFAULT_LOCALE,
tzinfo: Optional[TZ_EXPR] = None,
normalize_whitespace: bool = False,
) -> Arrow:
... # pragma: no cover
@overload
def get(
__arg1: str,
__arg2: Union[str, List[str]],
*,
locale: str = DEFAULT_LOCALE,
tzinfo: Optional[TZ_EXPR] = None,
normalize_whitespace: bool = False,
) -> Arrow:
... # pragma: no cover
def get(*args: Any, **kwargs: Any) -> Arrow:
"""Calls the default :class:`ArrowFactory <arrow.factory.ArrowFactory>` ``get`` method."""
return _factory.get(*args, **kwargs)
get.__doc__ = _factory.get.__doc__
def utcnow() -> Arrow:
"""Calls the default :class:`ArrowFactory <arrow.factory.ArrowFactory>` ``utcnow`` method."""
return _factory.utcnow()
utcnow.__doc__ = _factory.utcnow.__doc__
def now(tz: Optional[TZ_EXPR] = None) -> Arrow:
"""Calls the default :class:`ArrowFactory <arrow.factory.ArrowFactory>` ``now`` method."""
return _factory.now(tz)
now.__doc__ = _factory.now.__doc__
def factory(type: Type[Arrow]) -> ArrowFactory:
"""Returns an :class:`.ArrowFactory` for the specified :class:`Arrow <arrow.arrow.Arrow>`
or derived type.
:param type: the type, :class:`Arrow <arrow.arrow.Arrow>` or derived.
"""
return ArrowFactory(type)
__all__ = ["get", "utcnow", "now", "factory"]

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"""Constants used internally in arrow."""
import sys
from datetime import datetime
if sys.version_info < (3, 8): # pragma: no cover
from typing_extensions import Final
else:
from typing import Final # pragma: no cover
# datetime.max.timestamp() errors on Windows, so we must hardcode
# the highest possible datetime value that can output a timestamp.
# tl;dr platform-independent max timestamps are hard to form
# See: https://stackoverflow.com/q/46133223
try:
# Get max timestamp. Works on POSIX-based systems like Linux and macOS,
# but will trigger an OverflowError, ValueError, or OSError on Windows
_MAX_TIMESTAMP = datetime.max.timestamp()
except (OverflowError, ValueError, OSError): # pragma: no cover
# Fallback for Windows and 32-bit systems if initial max timestamp call fails
# Must get max value of ctime on Windows based on architecture (x32 vs x64)
# https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/ctime-ctime32-ctime64-wctime-wctime32-wctime64
# Note: this may occur on both 32-bit Linux systems (issue #930) along with Windows systems
is_64bits = sys.maxsize > 2**32
_MAX_TIMESTAMP = (
datetime(3000, 1, 1, 23, 59, 59, 999999).timestamp()
if is_64bits
else datetime(2038, 1, 1, 23, 59, 59, 999999).timestamp()
)
MAX_TIMESTAMP: Final[float] = _MAX_TIMESTAMP
MAX_TIMESTAMP_MS: Final[float] = MAX_TIMESTAMP * 1000
MAX_TIMESTAMP_US: Final[float] = MAX_TIMESTAMP * 1_000_000
MAX_ORDINAL: Final[int] = datetime.max.toordinal()
MIN_ORDINAL: Final[int] = 1
DEFAULT_LOCALE: Final[str] = "en-us"
# Supported dehumanize locales
DEHUMANIZE_LOCALES = {
"en",
"en-us",
"en-gb",
"en-au",
"en-be",
"en-jp",
"en-za",
"en-ca",
"en-ph",
"fr",
"fr-fr",
"fr-ca",
"it",
"it-it",
"es",
"es-es",
"el",
"el-gr",
"ja",
"ja-jp",
"se",
"se-fi",
"se-no",
"se-se",
"sv",
"sv-se",
"fi",
"fi-fi",
"zh",
"zh-cn",
"zh-tw",
"zh-hk",
"nl",
"nl-nl",
"be",
"be-by",
"pl",
"pl-pl",
"ru",
"ru-ru",
"af",
"bg",
"bg-bg",
"ua",
"uk",
"uk-ua",
"mk",
"mk-mk",
"de",
"de-de",
"de-ch",
"de-at",
"nb",
"nb-no",
"nn",
"nn-no",
"pt",
"pt-pt",
"pt-br",
"tl",
"tl-ph",
"vi",
"vi-vn",
"tr",
"tr-tr",
"az",
"az-az",
"da",
"da-dk",
"ml",
"hi",
"cs",
"cs-cz",
"sk",
"sk-sk",
"fa",
"fa-ir",
"mr",
"ca",
"ca-es",
"ca-ad",
"ca-fr",
"ca-it",
"eo",
"eo-xx",
"bn",
"bn-bd",
"bn-in",
"rm",
"rm-ch",
"ro",
"ro-ro",
"sl",
"sl-si",
"id",
"id-id",
"ne",
"ne-np",
"ee",
"et",
"sw",
"sw-ke",
"sw-tz",
"la",
"la-va",
"lt",
"lt-lt",
"ms",
"ms-my",
"ms-bn",
"or",
"or-in",
"lb",
"lb-lu",
"zu",
"zu-za",
"sq",
"sq-al",
"ta",
"ta-in",
"ta-lk",
"ur",
"ur-pk",
"ka",
"ka-ge",
"kk",
"kk-kz",
# "lo",
# "lo-la",
"am",
"am-et",
"hy-am",
"hy",
"uz",
"uz-uz",
}

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"""
Implements the :class:`ArrowFactory <arrow.factory.ArrowFactory>` class,
providing factory methods for common :class:`Arrow <arrow.arrow.Arrow>`
construction scenarios.
"""
import calendar
from datetime import date, datetime
from datetime import tzinfo as dt_tzinfo
from decimal import Decimal
from time import struct_time
from typing import Any, List, Optional, Tuple, Type, Union, overload
from dateutil import tz as dateutil_tz
from arrow import parser
from arrow.arrow import TZ_EXPR, Arrow
from arrow.constants import DEFAULT_LOCALE
from arrow.util import is_timestamp, iso_to_gregorian
class ArrowFactory:
"""A factory for generating :class:`Arrow <arrow.arrow.Arrow>` objects.
:param type: (optional) the :class:`Arrow <arrow.arrow.Arrow>`-based class to construct from.
Defaults to :class:`Arrow <arrow.arrow.Arrow>`.
"""
type: Type[Arrow]
def __init__(self, type: Type[Arrow] = Arrow) -> None:
self.type = type
@overload
def get(
self,
*,
locale: str = DEFAULT_LOCALE,
tzinfo: Optional[TZ_EXPR] = None,
normalize_whitespace: bool = False,
) -> Arrow:
... # pragma: no cover
@overload
def get(
self,
__obj: Union[
Arrow,
datetime,
date,
struct_time,
dt_tzinfo,
int,
float,
str,
Tuple[int, int, int],
],
*,
locale: str = DEFAULT_LOCALE,
tzinfo: Optional[TZ_EXPR] = None,
normalize_whitespace: bool = False,
) -> Arrow:
... # pragma: no cover
@overload
def get(
self,
__arg1: Union[datetime, date],
__arg2: TZ_EXPR,
*,
locale: str = DEFAULT_LOCALE,
tzinfo: Optional[TZ_EXPR] = None,
normalize_whitespace: bool = False,
) -> Arrow:
... # pragma: no cover
@overload
def get(
self,
__arg1: str,
__arg2: Union[str, List[str]],
*,
locale: str = DEFAULT_LOCALE,
tzinfo: Optional[TZ_EXPR] = None,
normalize_whitespace: bool = False,
) -> Arrow:
... # pragma: no cover
def get(self, *args: Any, **kwargs: Any) -> Arrow:
"""Returns an :class:`Arrow <arrow.arrow.Arrow>` object based on flexible inputs.
:param locale: (optional) a ``str`` specifying a locale for the parser. Defaults to 'en-us'.
:param tzinfo: (optional) a :ref:`timezone expression <tz-expr>` or tzinfo object.
Replaces the timezone unless using an input form that is explicitly UTC or specifies
the timezone in a positional argument. Defaults to UTC.
:param normalize_whitespace: (optional) a ``bool`` specifying whether or not to normalize
redundant whitespace (spaces, tabs, and newlines) in a datetime string before parsing.
Defaults to false.
Usage::
>>> import arrow
**No inputs** to get current UTC time::
>>> arrow.get()
<Arrow [2013-05-08T05:51:43.316458+00:00]>
**One** :class:`Arrow <arrow.arrow.Arrow>` object, to get a copy.
>>> arw = arrow.utcnow()
>>> arrow.get(arw)
<Arrow [2013-10-23T15:21:54.354846+00:00]>
**One** ``float`` or ``int``, convertible to a floating-point timestamp, to get
that timestamp in UTC::
>>> arrow.get(1367992474.293378)
<Arrow [2013-05-08T05:54:34.293378+00:00]>
>>> arrow.get(1367992474)
<Arrow [2013-05-08T05:54:34+00:00]>
**One** ISO 8601-formatted ``str``, to parse it::
>>> arrow.get('2013-09-29T01:26:43.830580')
<Arrow [2013-09-29T01:26:43.830580+00:00]>
**One** ISO 8601-formatted ``str``, in basic format, to parse it::
>>> arrow.get('20160413T133656.456289')
<Arrow [2016-04-13T13:36:56.456289+00:00]>
**One** ``tzinfo``, to get the current time **converted** to that timezone::
>>> arrow.get(tz.tzlocal())
<Arrow [2013-05-07T22:57:28.484717-07:00]>
**One** naive ``datetime``, to get that datetime in UTC::
>>> arrow.get(datetime(2013, 5, 5))
<Arrow [2013-05-05T00:00:00+00:00]>
**One** aware ``datetime``, to get that datetime::
>>> arrow.get(datetime(2013, 5, 5, tzinfo=tz.tzlocal()))
<Arrow [2013-05-05T00:00:00-07:00]>
**One** naive ``date``, to get that date in UTC::
>>> arrow.get(date(2013, 5, 5))
<Arrow [2013-05-05T00:00:00+00:00]>
**One** time.struct time::
>>> arrow.get(gmtime(0))
<Arrow [1970-01-01T00:00:00+00:00]>
**One** iso calendar ``tuple``, to get that week date in UTC::
>>> arrow.get((2013, 18, 7))
<Arrow [2013-05-05T00:00:00+00:00]>
**Two** arguments, a naive or aware ``datetime``, and a replacement
:ref:`timezone expression <tz-expr>`::
>>> arrow.get(datetime(2013, 5, 5), 'US/Pacific')
<Arrow [2013-05-05T00:00:00-07:00]>
**Two** arguments, a naive ``date``, and a replacement
:ref:`timezone expression <tz-expr>`::
>>> arrow.get(date(2013, 5, 5), 'US/Pacific')
<Arrow [2013-05-05T00:00:00-07:00]>
**Two** arguments, both ``str``, to parse the first according to the format of the second::
>>> arrow.get('2013-05-05 12:30:45 America/Chicago', 'YYYY-MM-DD HH:mm:ss ZZZ')
<Arrow [2013-05-05T12:30:45-05:00]>
**Two** arguments, first a ``str`` to parse and second a ``list`` of formats to try::
>>> arrow.get('2013-05-05 12:30:45', ['MM/DD/YYYY', 'YYYY-MM-DD HH:mm:ss'])
<Arrow [2013-05-05T12:30:45+00:00]>
**Three or more** arguments, as for the direct constructor of an ``Arrow`` object::
>>> arrow.get(2013, 5, 5, 12, 30, 45)
<Arrow [2013-05-05T12:30:45+00:00]>
"""
arg_count = len(args)
locale = kwargs.pop("locale", DEFAULT_LOCALE)
tz = kwargs.get("tzinfo", None)
normalize_whitespace = kwargs.pop("normalize_whitespace", False)
# if kwargs given, send to constructor unless only tzinfo provided
if len(kwargs) > 1:
arg_count = 3
# tzinfo kwarg is not provided
if len(kwargs) == 1 and tz is None:
arg_count = 3
# () -> now, @ tzinfo or utc
if arg_count == 0:
if isinstance(tz, str):
tz = parser.TzinfoParser.parse(tz)
return self.type.now(tzinfo=tz)
if isinstance(tz, dt_tzinfo):
return self.type.now(tzinfo=tz)
return self.type.utcnow()
if arg_count == 1:
arg = args[0]
if isinstance(arg, Decimal):
arg = float(arg)
# (None) -> raises an exception
if arg is None:
raise TypeError("Cannot parse argument of type None.")
# try (int, float) -> from timestamp @ tzinfo
elif not isinstance(arg, str) and is_timestamp(arg):
if tz is None:
# set to UTC by default
tz = dateutil_tz.tzutc()
return self.type.fromtimestamp(arg, tzinfo=tz)
# (Arrow) -> from the object's datetime @ tzinfo
elif isinstance(arg, Arrow):
return self.type.fromdatetime(arg.datetime, tzinfo=tz)
# (datetime) -> from datetime @ tzinfo
elif isinstance(arg, datetime):
return self.type.fromdatetime(arg, tzinfo=tz)
# (date) -> from date @ tzinfo
elif isinstance(arg, date):
return self.type.fromdate(arg, tzinfo=tz)
# (tzinfo) -> now @ tzinfo
elif isinstance(arg, dt_tzinfo):
return self.type.now(tzinfo=arg)
# (str) -> parse @ tzinfo
elif isinstance(arg, str):
dt = parser.DateTimeParser(locale).parse_iso(arg, normalize_whitespace)
return self.type.fromdatetime(dt, tzinfo=tz)
# (struct_time) -> from struct_time
elif isinstance(arg, struct_time):
return self.type.utcfromtimestamp(calendar.timegm(arg))
# (iso calendar) -> convert then from date @ tzinfo
elif isinstance(arg, tuple) and len(arg) == 3:
d = iso_to_gregorian(*arg)
return self.type.fromdate(d, tzinfo=tz)
else:
raise TypeError(f"Cannot parse single argument of type {type(arg)!r}.")
elif arg_count == 2:
arg_1, arg_2 = args[0], args[1]
if isinstance(arg_1, datetime):
# (datetime, tzinfo/str) -> fromdatetime @ tzinfo
if isinstance(arg_2, (dt_tzinfo, str)):
return self.type.fromdatetime(arg_1, tzinfo=arg_2)
else:
raise TypeError(
f"Cannot parse two arguments of types 'datetime', {type(arg_2)!r}."
)
elif isinstance(arg_1, date):
# (date, tzinfo/str) -> fromdate @ tzinfo
if isinstance(arg_2, (dt_tzinfo, str)):
return self.type.fromdate(arg_1, tzinfo=arg_2)
else:
raise TypeError(
f"Cannot parse two arguments of types 'date', {type(arg_2)!r}."
)
# (str, format) -> parse @ tzinfo
elif isinstance(arg_1, str) and isinstance(arg_2, (str, list)):
dt = parser.DateTimeParser(locale).parse(
args[0], args[1], normalize_whitespace
)
return self.type.fromdatetime(dt, tzinfo=tz)
else:
raise TypeError(
f"Cannot parse two arguments of types {type(arg_1)!r} and {type(arg_2)!r}."
)
# 3+ args -> datetime-like via constructor
else:
return self.type(*args, **kwargs)
def utcnow(self) -> Arrow:
"""Returns an :class:`Arrow <arrow.arrow.Arrow>` object, representing "now" in UTC time.
Usage::
>>> import arrow
>>> arrow.utcnow()
<Arrow [2013-05-08T05:19:07.018993+00:00]>
"""
return self.type.utcnow()
def now(self, tz: Optional[TZ_EXPR] = None) -> Arrow:
"""Returns an :class:`Arrow <arrow.arrow.Arrow>` object, representing "now" in the given
timezone.
:param tz: (optional) A :ref:`timezone expression <tz-expr>`. Defaults to local time.
Usage::
>>> import arrow
>>> arrow.now()
<Arrow [2013-05-07T22:19:11.363410-07:00]>
>>> arrow.now('US/Pacific')
<Arrow [2013-05-07T22:19:15.251821-07:00]>
>>> arrow.now('+02:00')
<Arrow [2013-05-08T07:19:25.618646+02:00]>
>>> arrow.now('local')
<Arrow [2013-05-07T22:19:39.130059-07:00]>
"""
if tz is None:
tz = dateutil_tz.tzlocal()
elif not isinstance(tz, dt_tzinfo):
tz = parser.TzinfoParser.parse(tz)
return self.type.now(tz)

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"""Provides the :class:`Arrow <arrow.formatter.DateTimeFormatter>` class, an improved formatter for datetimes."""
import re
import sys
from datetime import datetime, timedelta
from typing import Optional, Pattern, cast
from dateutil import tz as dateutil_tz
from arrow import locales
from arrow.constants import DEFAULT_LOCALE
if sys.version_info < (3, 8): # pragma: no cover
from typing_extensions import Final
else:
from typing import Final # pragma: no cover
FORMAT_ATOM: Final[str] = "YYYY-MM-DD HH:mm:ssZZ"
FORMAT_COOKIE: Final[str] = "dddd, DD-MMM-YYYY HH:mm:ss ZZZ"
FORMAT_RFC822: Final[str] = "ddd, DD MMM YY HH:mm:ss Z"
FORMAT_RFC850: Final[str] = "dddd, DD-MMM-YY HH:mm:ss ZZZ"
FORMAT_RFC1036: Final[str] = "ddd, DD MMM YY HH:mm:ss Z"
FORMAT_RFC1123: Final[str] = "ddd, DD MMM YYYY HH:mm:ss Z"
FORMAT_RFC2822: Final[str] = "ddd, DD MMM YYYY HH:mm:ss Z"
FORMAT_RFC3339: Final[str] = "YYYY-MM-DD HH:mm:ssZZ"
FORMAT_RSS: Final[str] = "ddd, DD MMM YYYY HH:mm:ss Z"
FORMAT_W3C: Final[str] = "YYYY-MM-DD HH:mm:ssZZ"
class DateTimeFormatter:
# This pattern matches characters enclosed in square brackets are matched as
# an atomic group. For more info on atomic groups and how to they are
# emulated in Python's re library, see https://stackoverflow.com/a/13577411/2701578
_FORMAT_RE: Final[Pattern[str]] = re.compile(
r"(\[(?:(?=(?P<literal>[^]]))(?P=literal))*\]|YYY?Y?|MM?M?M?|Do|DD?D?D?|d?dd?d?|HH?|hh?|mm?|ss?|SS?S?S?S?S?|ZZ?Z?|a|A|X|x|W)"
)
locale: locales.Locale
def __init__(self, locale: str = DEFAULT_LOCALE) -> None:
self.locale = locales.get_locale(locale)
def format(cls, dt: datetime, fmt: str) -> str:
# FIXME: _format_token() is nullable
return cls._FORMAT_RE.sub(
lambda m: cast(str, cls._format_token(dt, m.group(0))), fmt
)
def _format_token(self, dt: datetime, token: Optional[str]) -> Optional[str]:
if token and token.startswith("[") and token.endswith("]"):
return token[1:-1]
if token == "YYYY":
return self.locale.year_full(dt.year)
if token == "YY":
return self.locale.year_abbreviation(dt.year)
if token == "MMMM":
return self.locale.month_name(dt.month)
if token == "MMM":
return self.locale.month_abbreviation(dt.month)
if token == "MM":
return f"{dt.month:02d}"
if token == "M":
return f"{dt.month}"
if token == "DDDD":
return f"{dt.timetuple().tm_yday:03d}"
if token == "DDD":
return f"{dt.timetuple().tm_yday}"
if token == "DD":
return f"{dt.day:02d}"
if token == "D":
return f"{dt.day}"
if token == "Do":
return self.locale.ordinal_number(dt.day)
if token == "dddd":
return self.locale.day_name(dt.isoweekday())
if token == "ddd":
return self.locale.day_abbreviation(dt.isoweekday())
if token == "d":
return f"{dt.isoweekday()}"
if token == "HH":
return f"{dt.hour:02d}"
if token == "H":
return f"{dt.hour}"
if token == "hh":
return f"{dt.hour if 0 < dt.hour < 13 else abs(dt.hour - 12):02d}"
if token == "h":
return f"{dt.hour if 0 < dt.hour < 13 else abs(dt.hour - 12)}"
if token == "mm":
return f"{dt.minute:02d}"
if token == "m":
return f"{dt.minute}"
if token == "ss":
return f"{dt.second:02d}"
if token == "s":
return f"{dt.second}"
if token == "SSSSSS":
return f"{dt.microsecond:06d}"
if token == "SSSSS":
return f"{dt.microsecond // 10:05d}"
if token == "SSSS":
return f"{dt.microsecond // 100:04d}"
if token == "SSS":
return f"{dt.microsecond // 1000:03d}"
if token == "SS":
return f"{dt.microsecond // 10000:02d}"
if token == "S":
return f"{dt.microsecond // 100000}"
if token == "X":
return f"{dt.timestamp()}"
if token == "x":
return f"{dt.timestamp() * 1_000_000:.0f}"
if token == "ZZZ":
return dt.tzname()
if token in ["ZZ", "Z"]:
separator = ":" if token == "ZZ" else ""
tz = dateutil_tz.tzutc() if dt.tzinfo is None else dt.tzinfo
# `dt` must be aware object. Otherwise, this line will raise AttributeError
# https://github.com/arrow-py/arrow/pull/883#discussion_r529866834
# datetime awareness: https://docs.python.org/3/library/datetime.html#aware-and-naive-objects
total_minutes = int(cast(timedelta, tz.utcoffset(dt)).total_seconds() / 60)
sign = "+" if total_minutes >= 0 else "-"
total_minutes = abs(total_minutes)
hour, minute = divmod(total_minutes, 60)
return f"{sign}{hour:02d}{separator}{minute:02d}"
if token in ("a", "A"):
return self.locale.meridian(dt.hour, token)
if token == "W":
year, week, day = dt.isocalendar()
return f"{year}-W{week:02d}-{day}"

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"""Provides the :class:`Arrow <arrow.parser.DateTimeParser>` class, a better way to parse datetime strings."""
import re
import sys
from datetime import datetime, timedelta
from datetime import tzinfo as dt_tzinfo
from functools import lru_cache
from typing import (
Any,
ClassVar,
Dict,
Iterable,
List,
Match,
Optional,
Pattern,
SupportsFloat,
SupportsInt,
Tuple,
Union,
cast,
overload,
)
from dateutil import tz
from arrow import locales
from arrow.constants import DEFAULT_LOCALE
from arrow.util import next_weekday, normalize_timestamp
if sys.version_info < (3, 8): # pragma: no cover
from typing_extensions import Literal, TypedDict
else:
from typing import Literal, TypedDict # pragma: no cover
class ParserError(ValueError):
pass
# Allows for ParserErrors to be propagated from _build_datetime()
# when day_of_year errors occur.
# Before this, the ParserErrors were caught by the try/except in
# _parse_multiformat() and the appropriate error message was not
# transmitted to the user.
class ParserMatchError(ParserError):
pass
_WEEKDATE_ELEMENT = Union[str, bytes, SupportsInt, bytearray]
_FORMAT_TYPE = Literal[
"YYYY",
"YY",
"MM",
"M",
"DDDD",
"DDD",
"DD",
"D",
"HH",
"H",
"hh",
"h",
"mm",
"m",
"ss",
"s",
"X",
"x",
"ZZZ",
"ZZ",
"Z",
"S",
"W",
"MMMM",
"MMM",
"Do",
"dddd",
"ddd",
"d",
"a",
"A",
]
class _Parts(TypedDict, total=False):
year: int
month: int
day_of_year: int
day: int
hour: int
minute: int
second: int
microsecond: int
timestamp: float
expanded_timestamp: int
tzinfo: dt_tzinfo
am_pm: Literal["am", "pm"]
day_of_week: int
weekdate: Tuple[_WEEKDATE_ELEMENT, _WEEKDATE_ELEMENT, Optional[_WEEKDATE_ELEMENT]]
class DateTimeParser:
_FORMAT_RE: ClassVar[Pattern[str]] = re.compile(
r"(YYY?Y?|MM?M?M?|Do|DD?D?D?|d?d?d?d|HH?|hh?|mm?|ss?|S+|ZZ?Z?|a|A|x|X|W)"
)
_ESCAPE_RE: ClassVar[Pattern[str]] = re.compile(r"\[[^\[\]]*\]")
_ONE_OR_TWO_DIGIT_RE: ClassVar[Pattern[str]] = re.compile(r"\d{1,2}")
_ONE_OR_TWO_OR_THREE_DIGIT_RE: ClassVar[Pattern[str]] = re.compile(r"\d{1,3}")
_ONE_OR_MORE_DIGIT_RE: ClassVar[Pattern[str]] = re.compile(r"\d+")
_TWO_DIGIT_RE: ClassVar[Pattern[str]] = re.compile(r"\d{2}")
_THREE_DIGIT_RE: ClassVar[Pattern[str]] = re.compile(r"\d{3}")
_FOUR_DIGIT_RE: ClassVar[Pattern[str]] = re.compile(r"\d{4}")
_TZ_Z_RE: ClassVar[Pattern[str]] = re.compile(r"([\+\-])(\d{2})(?:(\d{2}))?|Z")
_TZ_ZZ_RE: ClassVar[Pattern[str]] = re.compile(r"([\+\-])(\d{2})(?:\:(\d{2}))?|Z")
_TZ_NAME_RE: ClassVar[Pattern[str]] = re.compile(r"\w[\w+\-/]+")
# NOTE: timestamps cannot be parsed from natural language strings (by removing the ^...$) because it will
# break cases like "15 Jul 2000" and a format list (see issue #447)
_TIMESTAMP_RE: ClassVar[Pattern[str]] = re.compile(r"^\-?\d+\.?\d+$")
_TIMESTAMP_EXPANDED_RE: ClassVar[Pattern[str]] = re.compile(r"^\-?\d+$")
_TIME_RE: ClassVar[Pattern[str]] = re.compile(
r"^(\d{2})(?:\:?(\d{2}))?(?:\:?(\d{2}))?(?:([\.\,])(\d+))?$"
)
_WEEK_DATE_RE: ClassVar[Pattern[str]] = re.compile(
r"(?P<year>\d{4})[\-]?W(?P<week>\d{2})[\-]?(?P<day>\d)?"
)
_BASE_INPUT_RE_MAP: ClassVar[Dict[_FORMAT_TYPE, Pattern[str]]] = {
"YYYY": _FOUR_DIGIT_RE,
"YY": _TWO_DIGIT_RE,
"MM": _TWO_DIGIT_RE,
"M": _ONE_OR_TWO_DIGIT_RE,
"DDDD": _THREE_DIGIT_RE,
"DDD": _ONE_OR_TWO_OR_THREE_DIGIT_RE,
"DD": _TWO_DIGIT_RE,
"D": _ONE_OR_TWO_DIGIT_RE,
"HH": _TWO_DIGIT_RE,
"H": _ONE_OR_TWO_DIGIT_RE,
"hh": _TWO_DIGIT_RE,
"h": _ONE_OR_TWO_DIGIT_RE,
"mm": _TWO_DIGIT_RE,
"m": _ONE_OR_TWO_DIGIT_RE,
"ss": _TWO_DIGIT_RE,
"s": _ONE_OR_TWO_DIGIT_RE,
"X": _TIMESTAMP_RE,
"x": _TIMESTAMP_EXPANDED_RE,
"ZZZ": _TZ_NAME_RE,
"ZZ": _TZ_ZZ_RE,
"Z": _TZ_Z_RE,
"S": _ONE_OR_MORE_DIGIT_RE,
"W": _WEEK_DATE_RE,
}
SEPARATORS: ClassVar[List[str]] = ["-", "/", "."]
locale: locales.Locale
_input_re_map: Dict[_FORMAT_TYPE, Pattern[str]]
def __init__(self, locale: str = DEFAULT_LOCALE, cache_size: int = 0) -> None:
self.locale = locales.get_locale(locale)
self._input_re_map = self._BASE_INPUT_RE_MAP.copy()
self._input_re_map.update(
{
"MMMM": self._generate_choice_re(
self.locale.month_names[1:], re.IGNORECASE
),
"MMM": self._generate_choice_re(
self.locale.month_abbreviations[1:], re.IGNORECASE
),
"Do": re.compile(self.locale.ordinal_day_re),
"dddd": self._generate_choice_re(
self.locale.day_names[1:], re.IGNORECASE
),
"ddd": self._generate_choice_re(
self.locale.day_abbreviations[1:], re.IGNORECASE
),
"d": re.compile(r"[1-7]"),
"a": self._generate_choice_re(
(self.locale.meridians["am"], self.locale.meridians["pm"])
),
# note: 'A' token accepts both 'am/pm' and 'AM/PM' formats to
# ensure backwards compatibility of this token
"A": self._generate_choice_re(self.locale.meridians.values()),
}
)
if cache_size > 0:
self._generate_pattern_re = lru_cache(maxsize=cache_size)( # type: ignore
self._generate_pattern_re
)
# TODO: since we support more than ISO 8601, we should rename this function
# IDEA: break into multiple functions
def parse_iso(
self, datetime_string: str, normalize_whitespace: bool = False
) -> datetime:
if normalize_whitespace:
datetime_string = re.sub(r"\s+", " ", datetime_string.strip())
has_space_divider = " " in datetime_string
has_t_divider = "T" in datetime_string
num_spaces = datetime_string.count(" ")
if has_space_divider and num_spaces != 1 or has_t_divider and num_spaces > 0:
raise ParserError(
f"Expected an ISO 8601-like string, but was given {datetime_string!r}. "
"Try passing in a format string to resolve this."
)
has_time = has_space_divider or has_t_divider
has_tz = False
# date formats (ISO 8601 and others) to test against
# NOTE: YYYYMM is omitted to avoid confusion with YYMMDD (no longer part of ISO 8601, but is still often used)
formats = [
"YYYY-MM-DD",
"YYYY-M-DD",
"YYYY-M-D",
"YYYY/MM/DD",
"YYYY/M/DD",
"YYYY/M/D",
"YYYY.MM.DD",
"YYYY.M.DD",
"YYYY.M.D",
"YYYYMMDD",
"YYYY-DDDD",
"YYYYDDDD",
"YYYY-MM",
"YYYY/MM",
"YYYY.MM",
"YYYY",
"W",
]
if has_time:
if has_space_divider:
date_string, time_string = datetime_string.split(" ", 1)
else:
date_string, time_string = datetime_string.split("T", 1)
time_parts = re.split(r"[\+\-Z]", time_string, 1, re.IGNORECASE)
time_components: Optional[Match[str]] = self._TIME_RE.match(time_parts[0])
if time_components is None:
raise ParserError(
"Invalid time component provided. "
"Please specify a format or provide a valid time component in the basic or extended ISO 8601 time format."
)
(
hours,
minutes,
seconds,
subseconds_sep,
subseconds,
) = time_components.groups()
has_tz = len(time_parts) == 2
has_minutes = minutes is not None
has_seconds = seconds is not None
has_subseconds = subseconds is not None
is_basic_time_format = ":" not in time_parts[0]
tz_format = "Z"
# use 'ZZ' token instead since tz offset is present in non-basic format
if has_tz and ":" in time_parts[1]:
tz_format = "ZZ"
time_sep = "" if is_basic_time_format else ":"
if has_subseconds:
time_string = "HH{time_sep}mm{time_sep}ss{subseconds_sep}S".format(
time_sep=time_sep, subseconds_sep=subseconds_sep
)
elif has_seconds:
time_string = "HH{time_sep}mm{time_sep}ss".format(time_sep=time_sep)
elif has_minutes:
time_string = f"HH{time_sep}mm"
else:
time_string = "HH"
if has_space_divider:
formats = [f"{f} {time_string}" for f in formats]
else:
formats = [f"{f}T{time_string}" for f in formats]
if has_time and has_tz:
# Add "Z" or "ZZ" to the format strings to indicate to
# _parse_token() that a timezone needs to be parsed
formats = [f"{f}{tz_format}" for f in formats]
return self._parse_multiformat(datetime_string, formats)
def parse(
self,
datetime_string: str,
fmt: Union[List[str], str],
normalize_whitespace: bool = False,
) -> datetime:
if normalize_whitespace:
datetime_string = re.sub(r"\s+", " ", datetime_string)
if isinstance(fmt, list):
return self._parse_multiformat(datetime_string, fmt)
try:
fmt_tokens: List[_FORMAT_TYPE]
fmt_pattern_re: Pattern[str]
fmt_tokens, fmt_pattern_re = self._generate_pattern_re(fmt)
except re.error as e:
raise ParserMatchError(
f"Failed to generate regular expression pattern: {e}."
)
match = fmt_pattern_re.search(datetime_string)
if match is None:
raise ParserMatchError(
f"Failed to match {fmt!r} when parsing {datetime_string!r}."
)
parts: _Parts = {}
for token in fmt_tokens:
value: Union[Tuple[str, str, str], str]
if token == "Do":
value = match.group("value")
elif token == "W":
value = (match.group("year"), match.group("week"), match.group("day"))
else:
value = match.group(token)
if value is None:
raise ParserMatchError(
f"Unable to find a match group for the specified token {token!r}."
)
self._parse_token(token, value, parts) # type: ignore
return self._build_datetime(parts)
def _generate_pattern_re(self, fmt: str) -> Tuple[List[_FORMAT_TYPE], Pattern[str]]:
# fmt is a string of tokens like 'YYYY-MM-DD'
# we construct a new string by replacing each
# token by its pattern:
# 'YYYY-MM-DD' -> '(?P<YYYY>\d{4})-(?P<MM>\d{2})-(?P<DD>\d{2})'
tokens: List[_FORMAT_TYPE] = []
offset = 0
# Escape all special RegEx chars
escaped_fmt = re.escape(fmt)
# Extract the bracketed expressions to be reinserted later.
escaped_fmt = re.sub(self._ESCAPE_RE, "#", escaped_fmt)
# Any number of S is the same as one.
# TODO: allow users to specify the number of digits to parse
escaped_fmt = re.sub(r"S+", "S", escaped_fmt)
escaped_data = re.findall(self._ESCAPE_RE, fmt)
fmt_pattern = escaped_fmt
for m in self._FORMAT_RE.finditer(escaped_fmt):
token: _FORMAT_TYPE = cast(_FORMAT_TYPE, m.group(0))
try:
input_re = self._input_re_map[token]
except KeyError:
raise ParserError(f"Unrecognized token {token!r}.")
input_pattern = f"(?P<{token}>{input_re.pattern})"
tokens.append(token)
# a pattern doesn't have the same length as the token
# it replaces! We keep the difference in the offset variable.
# This works because the string is scanned left-to-right and matches
# are returned in the order found by finditer.
fmt_pattern = (
fmt_pattern[: m.start() + offset]
+ input_pattern
+ fmt_pattern[m.end() + offset :]
)
offset += len(input_pattern) - (m.end() - m.start())
final_fmt_pattern = ""
split_fmt = fmt_pattern.split(r"\#")
# Due to the way Python splits, 'split_fmt' will always be longer
for i in range(len(split_fmt)):
final_fmt_pattern += split_fmt[i]
if i < len(escaped_data):
final_fmt_pattern += escaped_data[i][1:-1]
# Wrap final_fmt_pattern in a custom word boundary to strictly
# match the formatting pattern and filter out date and time formats
# that include junk such as: blah1998-09-12 blah, blah 1998-09-12blah,
# blah1998-09-12blah. The custom word boundary matches every character
# that is not a whitespace character to allow for searching for a date
# and time string in a natural language sentence. Therefore, searching
# for a string of the form YYYY-MM-DD in "blah 1998-09-12 blah" will
# work properly.
# Certain punctuation before or after the target pattern such as
# "1998-09-12," is permitted. For the full list of valid punctuation,
# see the documentation.
starting_word_boundary = (
r"(?<!\S\S)" # Don't have two consecutive non-whitespace characters. This ensures that we allow cases
# like .11.25.2019 but not 1.11.25.2019 (for pattern MM.DD.YYYY)
r"(?<![^\,\.\;\:\?\!\"\'\`\[\]\{\}\(\)<>\s])" # This is the list of punctuation that is ok before the
# pattern (i.e. "It can't not be these characters before the pattern")
r"(\b|^)"
# The \b is to block cases like 1201912 but allow 201912 for pattern YYYYMM. The ^ was necessary to allow a
# negative number through i.e. before epoch numbers
)
ending_word_boundary = (
r"(?=[\,\.\;\:\?\!\"\'\`\[\]\{\}\(\)\<\>]?" # Positive lookahead stating that these punctuation marks
# can appear after the pattern at most 1 time
r"(?!\S))" # Don't allow any non-whitespace character after the punctuation
)
bounded_fmt_pattern = r"{}{}{}".format(
starting_word_boundary, final_fmt_pattern, ending_word_boundary
)
return tokens, re.compile(bounded_fmt_pattern, flags=re.IGNORECASE)
@overload
def _parse_token(
self,
token: Literal[
"YYYY",
"YY",
"MM",
"M",
"DDDD",
"DDD",
"DD",
"D",
"Do",
"HH",
"hh",
"h",
"H",
"mm",
"m",
"ss",
"s",
"x",
],
value: Union[str, bytes, SupportsInt, bytearray],
parts: _Parts,
) -> None:
... # pragma: no cover
@overload
def _parse_token(
self,
token: Literal["X"],
value: Union[str, bytes, SupportsFloat, bytearray],
parts: _Parts,
) -> None:
... # pragma: no cover
@overload
def _parse_token(
self,
token: Literal["MMMM", "MMM", "dddd", "ddd", "S"],
value: Union[str, bytes, bytearray],
parts: _Parts,
) -> None:
... # pragma: no cover
@overload
def _parse_token(
self,
token: Literal["a", "A", "ZZZ", "ZZ", "Z"],
value: Union[str, bytes],
parts: _Parts,
) -> None:
... # pragma: no cover
@overload
def _parse_token(
self,
token: Literal["W"],
value: Tuple[_WEEKDATE_ELEMENT, _WEEKDATE_ELEMENT, Optional[_WEEKDATE_ELEMENT]],
parts: _Parts,
) -> None:
... # pragma: no cover
def _parse_token(
self,
token: Any,
value: Any,
parts: _Parts,
) -> None:
if token == "YYYY":
parts["year"] = int(value)
elif token == "YY":
value = int(value)
parts["year"] = 1900 + value if value > 68 else 2000 + value
elif token in ["MMMM", "MMM"]:
# FIXME: month_number() is nullable
parts["month"] = self.locale.month_number(value.lower()) # type: ignore
elif token in ["MM", "M"]:
parts["month"] = int(value)
elif token in ["DDDD", "DDD"]:
parts["day_of_year"] = int(value)
elif token in ["DD", "D"]:
parts["day"] = int(value)
elif token == "Do":
parts["day"] = int(value)
elif token == "dddd":
# locale day names are 1-indexed
day_of_week = [x.lower() for x in self.locale.day_names].index(
value.lower()
)
parts["day_of_week"] = day_of_week - 1
elif token == "ddd":
# locale day abbreviations are 1-indexed
day_of_week = [x.lower() for x in self.locale.day_abbreviations].index(
value.lower()
)
parts["day_of_week"] = day_of_week - 1
elif token.upper() in ["HH", "H"]:
parts["hour"] = int(value)
elif token in ["mm", "m"]:
parts["minute"] = int(value)
elif token in ["ss", "s"]:
parts["second"] = int(value)
elif token == "S":
# We have the *most significant* digits of an arbitrary-precision integer.
# We want the six most significant digits as an integer, rounded.
# IDEA: add nanosecond support somehow? Need datetime support for it first.
value = value.ljust(7, "0")
# floating-point (IEEE-754) defaults to half-to-even rounding
seventh_digit = int(value[6])
if seventh_digit == 5:
rounding = int(value[5]) % 2
elif seventh_digit > 5:
rounding = 1
else:
rounding = 0
parts["microsecond"] = int(value[:6]) + rounding
elif token == "X":
parts["timestamp"] = float(value)
elif token == "x":
parts["expanded_timestamp"] = int(value)
elif token in ["ZZZ", "ZZ", "Z"]:
parts["tzinfo"] = TzinfoParser.parse(value)
elif token in ["a", "A"]:
if value in (self.locale.meridians["am"], self.locale.meridians["AM"]):
parts["am_pm"] = "am"
if "hour" in parts and not 0 <= parts["hour"] <= 12:
raise ParserMatchError(
f"Hour token value must be between 0 and 12 inclusive for token {token!r}."
)
elif value in (self.locale.meridians["pm"], self.locale.meridians["PM"]):
parts["am_pm"] = "pm"
elif token == "W":
parts["weekdate"] = value
@staticmethod
def _build_datetime(parts: _Parts) -> datetime:
weekdate = parts.get("weekdate")
if weekdate is not None:
year, week = int(weekdate[0]), int(weekdate[1])
if weekdate[2] is not None:
_day = int(weekdate[2])
else:
# day not given, default to 1
_day = 1
date_string = f"{year}-{week}-{_day}"
# tokens for ISO 8601 weekdates
dt = datetime.strptime(date_string, "%G-%V-%u")
parts["year"] = dt.year
parts["month"] = dt.month
parts["day"] = dt.day
timestamp = parts.get("timestamp")
if timestamp is not None:
return datetime.fromtimestamp(timestamp, tz=tz.tzutc())
expanded_timestamp = parts.get("expanded_timestamp")
if expanded_timestamp is not None:
return datetime.fromtimestamp(
normalize_timestamp(expanded_timestamp),
tz=tz.tzutc(),
)
day_of_year = parts.get("day_of_year")
if day_of_year is not None:
_year = parts.get("year")
month = parts.get("month")
if _year is None:
raise ParserError(
"Year component is required with the DDD and DDDD tokens."
)
if month is not None:
raise ParserError(
"Month component is not allowed with the DDD and DDDD tokens."
)
date_string = f"{_year}-{day_of_year}"
try:
dt = datetime.strptime(date_string, "%Y-%j")
except ValueError:
raise ParserError(
f"The provided day of year {day_of_year!r} is invalid."
)
parts["year"] = dt.year
parts["month"] = dt.month
parts["day"] = dt.day
day_of_week: Optional[int] = parts.get("day_of_week")
day = parts.get("day")
# If day is passed, ignore day of week
if day_of_week is not None and day is None:
year = parts.get("year", 1970)
month = parts.get("month", 1)
day = 1
# dddd => first day of week after epoch
# dddd YYYY => first day of week in specified year
# dddd MM YYYY => first day of week in specified year and month
# dddd MM => first day after epoch in specified month
next_weekday_dt = next_weekday(datetime(year, month, day), day_of_week)
parts["year"] = next_weekday_dt.year
parts["month"] = next_weekday_dt.month
parts["day"] = next_weekday_dt.day
am_pm = parts.get("am_pm")
hour = parts.get("hour", 0)
if am_pm == "pm" and hour < 12:
hour += 12
elif am_pm == "am" and hour == 12:
hour = 0
# Support for midnight at the end of day
if hour == 24:
if parts.get("minute", 0) != 0:
raise ParserError("Midnight at the end of day must not contain minutes")
if parts.get("second", 0) != 0:
raise ParserError("Midnight at the end of day must not contain seconds")
if parts.get("microsecond", 0) != 0:
raise ParserError(
"Midnight at the end of day must not contain microseconds"
)
hour = 0
day_increment = 1
else:
day_increment = 0
# account for rounding up to 1000000
microsecond = parts.get("microsecond", 0)
if microsecond == 1000000:
microsecond = 0
second_increment = 1
else:
second_increment = 0
increment = timedelta(days=day_increment, seconds=second_increment)
return (
datetime(
year=parts.get("year", 1),
month=parts.get("month", 1),
day=parts.get("day", 1),
hour=hour,
minute=parts.get("minute", 0),
second=parts.get("second", 0),
microsecond=microsecond,
tzinfo=parts.get("tzinfo"),
)
+ increment
)
def _parse_multiformat(self, string: str, formats: Iterable[str]) -> datetime:
_datetime: Optional[datetime] = None
for fmt in formats:
try:
_datetime = self.parse(string, fmt)
break
except ParserMatchError:
pass
if _datetime is None:
supported_formats = ", ".join(formats)
raise ParserError(
f"Could not match input {string!r} to any of the following formats: {supported_formats}."
)
return _datetime
# generates a capture group of choices separated by an OR operator
@staticmethod
def _generate_choice_re(
choices: Iterable[str], flags: Union[int, re.RegexFlag] = 0
) -> Pattern[str]:
return re.compile(r"({})".format("|".join(choices)), flags=flags)
class TzinfoParser:
_TZINFO_RE: ClassVar[Pattern[str]] = re.compile(
r"^([\+\-])?(\d{2})(?:\:?(\d{2}))?$"
)
@classmethod
def parse(cls, tzinfo_string: str) -> dt_tzinfo:
tzinfo: Optional[dt_tzinfo] = None
if tzinfo_string == "local":
tzinfo = tz.tzlocal()
elif tzinfo_string in ["utc", "UTC", "Z"]:
tzinfo = tz.tzutc()
else:
iso_match = cls._TZINFO_RE.match(tzinfo_string)
if iso_match:
sign: Optional[str]
hours: str
minutes: Union[str, int, None]
sign, hours, minutes = iso_match.groups()
seconds = int(hours) * 3600 + int(minutes or 0) * 60
if sign == "-":
seconds *= -1
tzinfo = tz.tzoffset(None, seconds)
else:
tzinfo = tz.gettz(tzinfo_string)
if tzinfo is None:
raise ParserError(f"Could not parse timezone expression {tzinfo_string!r}.")
return tzinfo

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"""Helpful functions used internally within arrow."""
import datetime
from typing import Any, Optional, cast
from dateutil.rrule import WEEKLY, rrule
from arrow.constants import (
MAX_ORDINAL,
MAX_TIMESTAMP,
MAX_TIMESTAMP_MS,
MAX_TIMESTAMP_US,
MIN_ORDINAL,
)
def next_weekday(
start_date: Optional[datetime.date], weekday: int
) -> datetime.datetime:
"""Get next weekday from the specified start date.
:param start_date: Datetime object representing the start date.
:param weekday: Next weekday to obtain. Can be a value between 0 (Monday) and 6 (Sunday).
:return: Datetime object corresponding to the next weekday after start_date.
Usage::
# Get first Monday after epoch
>>> next_weekday(datetime(1970, 1, 1), 0)
1970-01-05 00:00:00
# Get first Thursday after epoch
>>> next_weekday(datetime(1970, 1, 1), 3)
1970-01-01 00:00:00
# Get first Sunday after epoch
>>> next_weekday(datetime(1970, 1, 1), 6)
1970-01-04 00:00:00
"""
if weekday < 0 or weekday > 6:
raise ValueError("Weekday must be between 0 (Monday) and 6 (Sunday).")
return cast(
datetime.datetime,
rrule(freq=WEEKLY, dtstart=start_date, byweekday=weekday, count=1)[0],
)
def is_timestamp(value: Any) -> bool:
"""Check if value is a valid timestamp."""
if isinstance(value, bool):
return False
if not isinstance(value, (int, float, str)):
return False
try:
float(value)
return True
except ValueError:
return False
def validate_ordinal(value: Any) -> None:
"""Raise an exception if value is an invalid Gregorian ordinal.
:param value: the input to be checked
"""
if isinstance(value, bool) or not isinstance(value, int):
raise TypeError(f"Ordinal must be an integer (got type {type(value)}).")
if not (MIN_ORDINAL <= value <= MAX_ORDINAL):
raise ValueError(f"Ordinal {value} is out of range.")
def normalize_timestamp(timestamp: float) -> float:
"""Normalize millisecond and microsecond timestamps into normal timestamps."""
if timestamp > MAX_TIMESTAMP:
if timestamp < MAX_TIMESTAMP_MS:
timestamp /= 1000
elif timestamp < MAX_TIMESTAMP_US:
timestamp /= 1_000_000
else:
raise ValueError(f"The specified timestamp {timestamp!r} is too large.")
return timestamp
# Credit to https://stackoverflow.com/a/1700069
def iso_to_gregorian(iso_year: int, iso_week: int, iso_day: int) -> datetime.date:
"""Converts an ISO week date into a datetime object.
:param iso_year: the year
:param iso_week: the week number, each year has either 52 or 53 weeks
:param iso_day: the day numbered 1 through 7, beginning with Monday
"""
if not 1 <= iso_week <= 53:
raise ValueError("ISO Calendar week value must be between 1-53.")
if not 1 <= iso_day <= 7:
raise ValueError("ISO Calendar day value must be between 1-7")
# The first week of the year always contains 4 Jan.
fourth_jan = datetime.date(iso_year, 1, 4)
delta = datetime.timedelta(fourth_jan.isoweekday() - 1)
year_start = fourth_jan - delta
gregorian = year_start + datetime.timedelta(days=iso_day - 1, weeks=iso_week - 1)
return gregorian
def validate_bounds(bounds: str) -> None:
if bounds != "()" and bounds != "(]" and bounds != "[)" and bounds != "[]":
raise ValueError(
"Invalid bounds. Please select between '()', '(]', '[)', or '[]'."
)
__all__ = ["next_weekday", "is_timestamp", "validate_ordinal", "iso_to_gregorian"]

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