def _build_datetime(parts):
weekdate = parts.get("weekdate")
if weekdate is not None:
# we can use strptime (%G, %V, %u) in python 3.6 but these tokens aren't available before that
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
dt = iso_to_gregorian(year, week, day)
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 = "{}-{}".format(year, day_of_year)
try:
dt = datetime.strptime(date_string, "%Y-%j")
except ValueError:
raise ParserError(
"The provided day of year '{}' is invalid.".format(day_of_year)
)
parts["year"] = dt.year
parts["month"] = dt.month
parts["day"] = dt.day
day_of_week = 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 test_iso_gregorian(self):
with pytest.raises(ValueError):
util.iso_to_gregorian(2013, 0, 5)
with pytest.raises(ValueError):
util.iso_to_gregorian(2013, 8, 0)
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 get(self, *args, **kwargs):
""" 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.
Usage::
>>> import arrow
**No inputs** to get current UTC time::
>>> arrow.get()
<Arrow [2013-05-08T05:51:43.316458+00:00]>
**None** to also get current UTC time::
>>> arrow.get(None)
<Arrow [2013-05-08T05:51:49.016458+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 constructor of a ``datetime``::
>>> arrow.get(2013, 5, 5, 12, 30, 45)
<Arrow [2013-05-05T12:30:45+00:00]>
"""
arg_count = len(args)
locale = kwargs.pop("locale", "en_us")
tz = kwargs.get("tzinfo", None)
# 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, @ utc.
if arg_count == 0:
if isstr(tz):
tz = parser.TzinfoParser.parse(tz)
return self.type.now(tz)
if isinstance(tz, dt_tzinfo):
return self.type.now(tz)
return self.type.utcnow()
if arg_count == 1:
arg = args[0]
# (None) -> now, @ utc.
if arg is None:
return self.type.utcnow()
# try (int, float) -> utc, from timestamp.
elif not isstr(arg) and is_timestamp(arg):
return self.type.utcfromtimestamp(arg)
# (Arrow) -> from the object's datetime.
elif isinstance(arg, Arrow):
return self.type.fromdatetime(arg.datetime)
# (datetime) -> from datetime.
elif isinstance(arg, datetime):
return self.type.fromdatetime(arg)
# (date) -> from date.
elif isinstance(arg, date):
return self.type.fromdate(arg)
# (tzinfo) -> now, @ tzinfo.
elif isinstance(arg, dt_tzinfo):
return self.type.now(arg)
# (str) -> parse.
elif isstr(arg):
dt = parser.DateTimeParser(locale).parse_iso(arg)
return self.type.fromdatetime(dt, tz)
# (struct_time) -> from struct_time
elif isinstance(arg, struct_time):
return self.type.utcfromtimestamp(calendar.timegm(arg))
# (iso calendar) -> convert then from date
elif isinstance(arg, tuple) and len(arg) == 3:
dt = iso_to_gregorian(*arg)
return self.type.fromdate(dt)
else:
raise TypeError(
"Can't parse single argument of type '{}'".format(
type(arg)))
elif arg_count == 2:
arg_1, arg_2 = args[0], args[1]
if isinstance(arg_1, datetime):
# (datetime, tzinfo/str) -> fromdatetime replace tzinfo.
if isinstance(arg_2, dt_tzinfo) or isstr(arg_2):
return self.type.fromdatetime(arg_1, arg_2)
else:
raise TypeError(
"Can't parse two arguments of types 'datetime', '{}'".
format(type(arg_2)))
elif isinstance(arg_1, date):
# (date, tzinfo/str) -> fromdate replace tzinfo.
if isinstance(arg_2, dt_tzinfo) or isstr(arg_2):
return self.type.fromdate(arg_1, tzinfo=arg_2)
else:
raise TypeError(
"Can't parse two arguments of types 'date', '{}'".
format(type(arg_2)))
# (str, format) -> parse.
elif isstr(arg_1) and (isstr(arg_2) or isinstance(arg_2, list)):
dt = parser.DateTimeParser(locale).parse(args[0], args[1])
return self.type.fromdatetime(dt, tzinfo=tz)
else:
raise TypeError(
"Can't parse two arguments of types '{}' and '{}'".format(
type(arg_1), type(arg_2)))
# 3+ args -> datetime-like via constructor.
else:
return self.type(*args, **kwargs)
def test_iso_gregorian(self):
with self.assertRaises(ValueError):
util.iso_to_gregorian(2013, 0, 5)
with self.assertRaises(ValueError):
util.iso_to_gregorian(2013, 8, 0)
