/usr/lib/python2.7/dist-packages/arrow/arrow.py is in python-arrow 0.10.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 | # -*- coding: utf-8 -*-
'''
Provides the :class:`Arrow <arrow.arrow.Arrow>` class, an enhanced ``datetime``
replacement.
'''
from __future__ import absolute_import
from datetime import datetime, timedelta, tzinfo
from dateutil import tz as dateutil_tz
from dateutil.relativedelta import relativedelta
import calendar
import sys
import warnings
from arrow import util, locales, parser, formatter
class Arrow(object):
'''An :class:`Arrow <arrow.arrow.Arrow>` object.
Implements the ``datetime`` interface, behaving as an aware ``datetime`` while implementing
additional functionality.
:param year: the calendar year.
:param month: the calendar month.
:param day: the calendar day.
:param hour: (optional) the hour. Defaults to 0.
:param minute: (optional) the minute, Defaults to 0.
:param second: (optional) the second, Defaults to 0.
:param microsecond: (optional) the microsecond. Defaults 0.
:param tzinfo: (optional) the ``tzinfo`` object. Defaults to ``None``.
If tzinfo is None, it is assumed to be UTC on creation.
Usage::
>>> import arrow
>>> arrow.Arrow(2013, 5, 5, 12, 30, 45)
<Arrow [2013-05-05T12:30:45+00:00]>
'''
resolution = datetime.resolution
_ATTRS = ['year', 'month', 'day', 'hour', 'minute', 'second', 'microsecond']
_ATTRS_PLURAL = ['{0}s'.format(a) for a in _ATTRS]
_MONTHS_PER_QUARTER = 3
def __init__(self, year, month, day, hour=0, minute=0, second=0, microsecond=0,
tzinfo=None):
if util.isstr(tzinfo):
tzinfo = parser.TzinfoParser.parse(tzinfo)
tzinfo = tzinfo or dateutil_tz.tzutc()
self._datetime = datetime(year, month, day, hour, minute, second,
microsecond, tzinfo)
# factories: single object, both original and from datetime.
@classmethod
def now(cls, tzinfo=None):
'''Constructs an :class:`Arrow <arrow.arrow.Arrow>` object, representing "now".
:param tzinfo: (optional) a ``tzinfo`` object. Defaults to local time.
'''
utc = datetime.utcnow().replace(tzinfo=dateutil_tz.tzutc())
dt = utc.astimezone(dateutil_tz.tzlocal() if tzinfo is None else tzinfo)
return cls(dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
dt.microsecond, dt.tzinfo)
@classmethod
def utcnow(cls):
''' Constructs an :class:`Arrow <arrow.arrow.Arrow>` object, representing "now" in UTC
time.
'''
dt = datetime.utcnow()
return cls(dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
dt.microsecond, dateutil_tz.tzutc())
@classmethod
def fromtimestamp(cls, timestamp, tzinfo=None):
''' Constructs an :class:`Arrow <arrow.arrow.Arrow>` object from a timestamp.
:param timestamp: an ``int`` or ``float`` timestamp, or a ``str`` that converts to either.
:param tzinfo: (optional) a ``tzinfo`` object. Defaults to local time.
'''
tzinfo = tzinfo or dateutil_tz.tzlocal()
timestamp = cls._get_timestamp_from_input(timestamp)
dt = datetime.fromtimestamp(timestamp, tzinfo)
return cls(dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
dt.microsecond, tzinfo)
@classmethod
def utcfromtimestamp(cls, timestamp):
'''Constructs an :class:`Arrow <arrow.arrow.Arrow>` object from a timestamp, in UTC time.
:param timestamp: an ``int`` or ``float`` timestamp, or a ``str`` that converts to either.
'''
timestamp = cls._get_timestamp_from_input(timestamp)
dt = datetime.utcfromtimestamp(timestamp)
return cls(dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
dt.microsecond, dateutil_tz.tzutc())
@classmethod
def fromdatetime(cls, dt, tzinfo=None):
''' Constructs an :class:`Arrow <arrow.arrow.Arrow>` object from a ``datetime`` and optional
``tzinfo`` object.
:param dt: the ``datetime``
:param tzinfo: (optional) a ``tzinfo`` object. Defaults to UTC.
'''
tzinfo = tzinfo or dt.tzinfo or dateutil_tz.tzutc()
return cls(dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
dt.microsecond, tzinfo)
@classmethod
def fromdate(cls, date, tzinfo=None):
''' Constructs an :class:`Arrow <arrow.arrow.Arrow>` object from a ``date`` and optional
``tzinfo`` object. Time values are set to 0.
:param date: the ``date``
:param tzinfo: (optional) a ``tzinfo`` object. Defaults to UTC.
'''
tzinfo = tzinfo or dateutil_tz.tzutc()
return cls(date.year, date.month, date.day, tzinfo=tzinfo)
@classmethod
def strptime(cls, date_str, fmt, tzinfo=None):
''' Constructs an :class:`Arrow <arrow.arrow.Arrow>` object from a date string and format,
in the style of ``datetime.strptime``.
:param date_str: the date string.
:param fmt: the format string.
:param tzinfo: (optional) an optional ``tzinfo``
'''
dt = datetime.strptime(date_str, fmt)
tzinfo = tzinfo or dt.tzinfo
return cls(dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
dt.microsecond, tzinfo)
# factories: ranges and spans
@classmethod
def range(cls, frame, start, end=None, tz=None, limit=None):
''' Returns an array of :class:`Arrow <arrow.arrow.Arrow>` objects, representing
an iteration of time between two inputs.
:param frame: the timeframe. Can be any ``datetime`` property (day, hour, minute...).
:param start: A datetime expression, the start of the range.
:param end: (optional) A datetime expression, the end of the range.
:param tz: (optional) A timezone expression. Defaults to UTC.
:param limit: (optional) A maximum number of tuples to return.
**NOTE**: the **end** or **limit** must be provided. Call with **end** alone to
return the entire range, with **limit** alone to return a maximum # of results from the
start, and with both to cap a range at a maximum # of results.
Supported frame values: year, quarter, month, week, day, hour, minute, second
Recognized datetime expressions:
- An :class:`Arrow <arrow.arrow.Arrow>` object.
- A ``datetime`` object.
Recognized timezone expressions:
- A ``tzinfo`` object.
- A ``str`` describing a timezone, similar to 'US/Pacific', or 'Europe/Berlin'.
- A ``str`` in ISO-8601 style, as in '+07:00'.
- A ``str``, one of the following: 'local', 'utc', 'UTC'.
Usage:
>>> start = datetime(2013, 5, 5, 12, 30)
>>> end = datetime(2013, 5, 5, 17, 15)
>>> for r in arrow.Arrow.range('hour', start, end):
... print repr(r)
...
<Arrow [2013-05-05T12:30:00+00:00]>
<Arrow [2013-05-05T13:30:00+00:00]>
<Arrow [2013-05-05T14:30:00+00:00]>
<Arrow [2013-05-05T15:30:00+00:00]>
<Arrow [2013-05-05T16:30:00+00:00]>
'''
_, frame_relative, relative_steps = cls._get_frames(frame)
tzinfo = cls._get_tzinfo(start.tzinfo if tz is None else tz)
start = cls._get_datetime(start).replace(tzinfo=tzinfo)
end, limit = cls._get_iteration_params(end, limit)
end = cls._get_datetime(end).replace(tzinfo=tzinfo)
current = cls.fromdatetime(start)
results = []
while current <= end and len(results) < limit:
results.append(current)
values = [getattr(current, f) for f in cls._ATTRS]
current = cls(*values, tzinfo=tzinfo) + relativedelta(**{frame_relative: relative_steps})
return results
@classmethod
def span_range(cls, frame, start, end, tz=None, limit=None):
''' Returns an array of tuples, each :class:`Arrow <arrow.arrow.Arrow>` objects,
representing a series of timespans between two inputs.
:param frame: the timeframe. Can be any ``datetime`` property (day, hour, minute...).
:param start: A datetime expression, the start of the range.
:param end: (optional) A datetime expression, the end of the range.
:param tz: (optional) A timezone expression. Defaults to UTC.
:param limit: (optional) A maximum number of tuples to return.
**NOTE**: the **end** or **limit** must be provided. Call with **end** alone to
return the entire range, with **limit** alone to return a maximum # of results from the
start, and with both to cap a range at a maximum # of results.
Supported frame values: year, quarter, month, week, day, hour, minute, second
Recognized datetime expressions:
- An :class:`Arrow <arrow.arrow.Arrow>` object.
- A ``datetime`` object.
Recognized timezone expressions:
- A ``tzinfo`` object.
- A ``str`` describing a timezone, similar to 'US/Pacific', or 'Europe/Berlin'.
- A ``str`` in ISO-8601 style, as in '+07:00'.
- A ``str``, one of the following: 'local', 'utc', 'UTC'.
Usage:
>>> start = datetime(2013, 5, 5, 12, 30)
>>> end = datetime(2013, 5, 5, 17, 15)
>>> for r in arrow.Arrow.span_range('hour', start, end):
... print r
...
(<Arrow [2013-05-05T12:00:00+00:00]>, <Arrow [2013-05-05T12:59:59.999999+00:00]>)
(<Arrow [2013-05-05T13:00:00+00:00]>, <Arrow [2013-05-05T13:59:59.999999+00:00]>)
(<Arrow [2013-05-05T14:00:00+00:00]>, <Arrow [2013-05-05T14:59:59.999999+00:00]>)
(<Arrow [2013-05-05T15:00:00+00:00]>, <Arrow [2013-05-05T15:59:59.999999+00:00]>)
(<Arrow [2013-05-05T16:00:00+00:00]>, <Arrow [2013-05-05T16:59:59.999999+00:00]>)
'''
tzinfo = cls._get_tzinfo(start.tzinfo if tz is None else tz)
start = cls.fromdatetime(start, tzinfo).span(frame)[0]
_range = cls.range(frame, start, end, tz, limit)
return [r.span(frame) for r in _range]
# representations
def __repr__(self):
dt = self._datetime
attrs = ', '.join([str(i) for i in [dt.year, dt.month, dt.day, dt.hour, dt.minute,
dt.second, dt.microsecond]])
return '<{0} [{1}]>'.format(self.__class__.__name__, self.__str__())
def __str__(self):
return self._datetime.isoformat()
def __format__(self, formatstr):
if len(formatstr) > 0:
return self.format(formatstr)
return str(self)
def __hash__(self):
return self._datetime.__hash__()
# attributes & properties
def __getattr__(self, name):
if name == 'week':
return self.isocalendar()[1]
if name == 'quarter':
return int((self.month-1)/self._MONTHS_PER_QUARTER) + 1
if not name.startswith('_'):
value = getattr(self._datetime, name, None)
if value is not None:
return value
return object.__getattribute__(self, name)
@property
def tzinfo(self):
''' Gets the ``tzinfo`` of the :class:`Arrow <arrow.arrow.Arrow>` object. '''
return self._datetime.tzinfo
@tzinfo.setter
def tzinfo(self, tzinfo):
''' Sets the ``tzinfo`` of the :class:`Arrow <arrow.arrow.Arrow>` object. '''
self._datetime = self._datetime.replace(tzinfo=tzinfo)
@property
def datetime(self):
''' Returns a datetime representation of the :class:`Arrow <arrow.arrow.Arrow>` object. '''
return self._datetime
@property
def naive(self):
''' Returns a naive datetime representation of the :class:`Arrow <arrow.arrow.Arrow>` object. '''
return self._datetime.replace(tzinfo=None)
@property
def timestamp(self):
''' Returns a timestamp representation of the :class:`Arrow <arrow.arrow.Arrow>` object. '''
return calendar.timegm(self._datetime.utctimetuple())
@property
def float_timestamp(self):
''' Returns a floating-point representation of the :class:`Arrow <arrow.arrow.Arrow>` object. '''
return self.timestamp + float(self.microsecond) / 1000000
# mutation and duplication.
def clone(self):
''' Returns a new :class:`Arrow <arrow.arrow.Arrow>` object, cloned from the current one.
Usage:
>>> arw = arrow.utcnow()
>>> cloned = arw.clone()
'''
return self.fromdatetime(self._datetime)
def replace(self, **kwargs):
''' Returns a new :class:`Arrow <arrow.arrow.Arrow>` object with attributes updated
according to inputs.
Use single property names to set their value absolutely:
>>> import arrow
>>> arw = arrow.utcnow()
>>> arw
<Arrow [2013-05-11T22:27:34.787885+00:00]>
>>> arw.replace(year=2014, month=6)
<Arrow [2014-06-11T22:27:34.787885+00:00]>
You can also provide a timezone expression can also be replaced:
>>> arw.replace(tzinfo=tz.tzlocal())
<Arrow [2013-05-11T22:27:34.787885-07:00]>
Use plural property names to shift their current value relatively (**deprecated**):
>>> arw.replace(years=1, months=-1)
<Arrow [2014-04-11T22:27:34.787885+00:00]>
Recognized timezone expressions:
- A ``tzinfo`` object.
- A ``str`` describing a timezone, similar to 'US/Pacific', or 'Europe/Berlin'.
- A ``str`` in ISO-8601 style, as in '+07:00'.
- A ``str``, one of the following: 'local', 'utc', 'UTC'.
'''
absolute_kwargs = {}
relative_kwargs = {} # TODO: DEPRECATED; remove in next release
for key, value in kwargs.items():
if key in self._ATTRS:
absolute_kwargs[key] = value
elif key in self._ATTRS_PLURAL or key in ['weeks', 'quarters']:
# TODO: DEPRECATED
warnings.warn("replace() with plural property to shift value"
"is deprecated, use shift() instead",
DeprecationWarning)
relative_kwargs[key] = value
elif key in ['week', 'quarter']:
raise AttributeError('setting absolute {0} is not supported'.format(key))
elif key !='tzinfo':
raise AttributeError('unknown attribute: "{0}"'.format(key))
# core datetime does not support quarters, translate to months.
relative_kwargs.setdefault('months', 0)
relative_kwargs['months'] += relative_kwargs.pop('quarters', 0) * self._MONTHS_PER_QUARTER
current = self._datetime.replace(**absolute_kwargs)
current += relativedelta(**relative_kwargs) # TODO: DEPRECATED
tzinfo = kwargs.get('tzinfo')
if tzinfo is not None:
tzinfo = self._get_tzinfo(tzinfo)
current = current.replace(tzinfo=tzinfo)
return self.fromdatetime(current)
def shift(self, **kwargs):
''' Returns a new :class:`Arrow <arrow.arrow.Arrow>` object with attributes updated
according to inputs.
Use plural property names to shift their current value relatively:
>>> import arrow
>>> arw = arrow.utcnow()
>>> arw
<Arrow [2013-05-11T22:27:34.787885+00:00]>
>>> arw.shift(years=1, months=-1)
<Arrow [2014-04-11T22:27:34.787885+00:00]>
'''
relative_kwargs = {}
for key, value in kwargs.items():
if key in self._ATTRS_PLURAL or key in ['weeks', 'quarters']:
relative_kwargs[key] = value
else:
raise AttributeError()
# core datetime does not support quarters, translate to months.
relative_kwargs.setdefault('months', 0)
relative_kwargs['months'] += relative_kwargs.pop('quarters', 0) * self._MONTHS_PER_QUARTER
current = self._datetime + relativedelta(**relative_kwargs)
return self.fromdatetime(current)
def to(self, tz):
''' Returns a new :class:`Arrow <arrow.arrow.Arrow>` object, converted
to the target timezone.
:param tz: an expression representing a timezone.
Recognized timezone expressions:
- A ``tzinfo`` object.
- A ``str`` describing a timezone, similar to 'US/Pacific', or 'Europe/Berlin'.
- A ``str`` in ISO-8601 style, as in '+07:00'.
- A ``str``, one of the following: 'local', 'utc', 'UTC'.
Usage::
>>> utc = arrow.utcnow()
>>> utc
<Arrow [2013-05-09T03:49:12.311072+00:00]>
>>> utc.to('US/Pacific')
<Arrow [2013-05-08T20:49:12.311072-07:00]>
>>> utc.to(tz.tzlocal())
<Arrow [2013-05-08T20:49:12.311072-07:00]>
>>> utc.to('-07:00')
<Arrow [2013-05-08T20:49:12.311072-07:00]>
>>> utc.to('local')
<Arrow [2013-05-08T20:49:12.311072-07:00]>
>>> utc.to('local').to('utc')
<Arrow [2013-05-09T03:49:12.311072+00:00]>
'''
if not isinstance(tz, tzinfo):
tz = parser.TzinfoParser.parse(tz)
dt = self._datetime.astimezone(tz)
return self.__class__(dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
dt.microsecond, dt.tzinfo)
def span(self, frame, count=1):
''' Returns two new :class:`Arrow <arrow.arrow.Arrow>` objects, representing the timespan
of the :class:`Arrow <arrow.arrow.Arrow>` object in a given timeframe.
:param frame: the timeframe. Can be any ``datetime`` property (day, hour, minute...).
:param count: (optional) the number of frames to span.
Supported frame values: year, quarter, month, week, day, hour, minute, second
Usage::
>>> arrow.utcnow()
<Arrow [2013-05-09T03:32:36.186203+00:00]>
>>> arrow.utcnow().span('hour')
(<Arrow [2013-05-09T03:00:00+00:00]>, <Arrow [2013-05-09T03:59:59.999999+00:00]>)
>>> arrow.utcnow().span('day')
(<Arrow [2013-05-09T00:00:00+00:00]>, <Arrow [2013-05-09T23:59:59.999999+00:00]>)
>>> arrow.utcnow().span('day', count=2)
(<Arrow [2013-05-09T00:00:00+00:00]>, <Arrow [2013-05-10T23:59:59.999999+00:00]>)
'''
frame_absolute, frame_relative, relative_steps = self._get_frames(frame)
if frame_absolute == 'week':
attr = 'day'
elif frame_absolute == 'quarter':
attr = 'month'
else:
attr = frame_absolute
index = self._ATTRS.index(attr)
frames = self._ATTRS[:index + 1]
values = [getattr(self, f) for f in frames]
for i in range(3 - len(values)):
values.append(1)
floor = self.__class__(*values, tzinfo=self.tzinfo)
if frame_absolute == 'week':
floor = floor + relativedelta(days=-(self.isoweekday() - 1))
elif frame_absolute == 'quarter':
floor = floor + relativedelta(months=-((self.month - 1) % 3))
ceil = floor + relativedelta(
**{frame_relative: count * relative_steps}) + relativedelta(microseconds=-1)
return floor, ceil
def floor(self, frame):
''' Returns a new :class:`Arrow <arrow.arrow.Arrow>` object, representing the "floor"
of the timespan of the :class:`Arrow <arrow.arrow.Arrow>` object in a given timeframe.
Equivalent to the first element in the 2-tuple returned by
:func:`span <arrow.arrow.Arrow.span>`.
:param frame: the timeframe. Can be any ``datetime`` property (day, hour, minute...).
Usage::
>>> arrow.utcnow().floor('hour')
<Arrow [2013-05-09T03:00:00+00:00]>
'''
return self.span(frame)[0]
def ceil(self, frame):
''' Returns a new :class:`Arrow <arrow.arrow.Arrow>` object, representing the "ceiling"
of the timespan of the :class:`Arrow <arrow.arrow.Arrow>` object in a given timeframe.
Equivalent to the second element in the 2-tuple returned by
:func:`span <arrow.arrow.Arrow.span>`.
:param frame: the timeframe. Can be any ``datetime`` property (day, hour, minute...).
Usage::
>>> arrow.utcnow().ceil('hour')
<Arrow [2013-05-09T03:59:59.999999+00:00]>
'''
return self.span(frame)[1]
# string output and formatting.
def format(self, fmt='YYYY-MM-DD HH:mm:ssZZ', locale='en_us'):
''' Returns a string representation of the :class:`Arrow <arrow.arrow.Arrow>` object,
formatted according to a format string.
:param fmt: the format string.
Usage::
>>> arrow.utcnow().format('YYYY-MM-DD HH:mm:ss ZZ')
'2013-05-09 03:56:47 -00:00'
>>> arrow.utcnow().format('X')
'1368071882'
>>> arrow.utcnow().format('MMMM DD, YYYY')
'May 09, 2013'
>>> arrow.utcnow().format()
'2013-05-09 03:56:47 -00:00'
'''
return formatter.DateTimeFormatter(locale).format(self._datetime, fmt)
def humanize(self, other=None, locale='en_us', only_distance=False):
''' Returns a localized, humanized representation of a relative difference in time.
:param other: (optional) an :class:`Arrow <arrow.arrow.Arrow>` or ``datetime`` object.
Defaults to now in the current :class:`Arrow <arrow.arrow.Arrow>` object's timezone.
:param locale: (optional) a ``str`` specifying a locale. Defaults to 'en_us'.
:param only_distance: (optional) returns only time difference eg: "11 seconds" without "in" or "ago" part.
Usage::
>>> earlier = arrow.utcnow().replace(hours=-2)
>>> earlier.humanize()
'2 hours ago'
>>> later = later = earlier.replace(hours=4)
>>> later.humanize(earlier)
'in 4 hours'
'''
locale = locales.get_locale(locale)
if other is None:
utc = datetime.utcnow().replace(tzinfo=dateutil_tz.tzutc())
dt = utc.astimezone(self._datetime.tzinfo)
elif isinstance(other, Arrow):
dt = other._datetime
elif isinstance(other, datetime):
if other.tzinfo is None:
dt = other.replace(tzinfo=self._datetime.tzinfo)
else:
dt = other.astimezone(self._datetime.tzinfo)
else:
raise TypeError()
delta = int(util.total_seconds(self._datetime - dt))
sign = -1 if delta < 0 else 1
diff = abs(delta)
delta = diff
if diff < 10:
return locale.describe('now', only_distance=only_distance)
if diff < 45:
return locale.describe('seconds', sign, only_distance=only_distance)
elif diff < 90:
return locale.describe('minute', sign, only_distance=only_distance)
elif diff < 2700:
minutes = sign * int(max(delta / 60, 2))
return locale.describe('minutes', minutes, only_distance=only_distance)
elif diff < 5400:
return locale.describe('hour', sign, only_distance=only_distance)
elif diff < 79200:
hours = sign * int(max(delta / 3600, 2))
return locale.describe('hours', hours, only_distance=only_distance)
elif diff < 129600:
return locale.describe('day', sign, only_distance=only_distance)
elif diff < 2160000:
days = sign * int(max(delta / 86400, 2))
return locale.describe('days', days, only_distance=only_distance)
elif diff < 3888000:
return locale.describe('month', sign, only_distance=only_distance)
elif diff < 29808000:
self_months = self._datetime.year * 12 + self._datetime.month
other_months = dt.year * 12 + dt.month
months = sign * int(max(abs(other_months - self_months), 2))
return locale.describe('months', months, only_distance=only_distance)
elif diff < 47260800:
return locale.describe('year', sign, only_distance=only_distance)
else:
years = sign * int(max(delta / 31536000, 2))
return locale.describe('years', years, only_distance=only_distance)
# math
def __add__(self, other):
if isinstance(other, (timedelta, relativedelta)):
return self.fromdatetime(self._datetime + other, self._datetime.tzinfo)
raise TypeError()
def __radd__(self, other):
return self.__add__(other)
def __sub__(self, other):
if isinstance(other, (timedelta, relativedelta)):
return self.fromdatetime(self._datetime - other, self._datetime.tzinfo)
elif isinstance(other, datetime):
return self._datetime - other
elif isinstance(other, Arrow):
return self._datetime - other._datetime
raise TypeError()
def __rsub__(self, other):
if isinstance(other, datetime):
return other - self._datetime
raise TypeError()
# comparisons
def _cmperror(self, other):
raise TypeError('can\'t compare \'{0}\' to \'{1}\''.format(
type(self), type(other)))
def __eq__(self, other):
if not isinstance(other, (Arrow, datetime)):
return False
return self._datetime == self._get_datetime(other)
def __ne__(self, other):
return not self.__eq__(other)
def __gt__(self, other):
if not isinstance(other, (Arrow, datetime)):
self._cmperror(other)
return self._datetime > self._get_datetime(other)
def __ge__(self, other):
if not isinstance(other, (Arrow, datetime)):
self._cmperror(other)
return self._datetime >= self._get_datetime(other)
def __lt__(self, other):
if not isinstance(other, (Arrow, datetime)):
self._cmperror(other)
return self._datetime < self._get_datetime(other)
def __le__(self, other):
if not isinstance(other, (Arrow, datetime)):
self._cmperror(other)
return self._datetime <= self._get_datetime(other)
# datetime methods
def date(self):
''' Returns a ``date`` object with the same year, month and day. '''
return self._datetime.date()
def time(self):
''' Returns a ``time`` object with the same hour, minute, second, microsecond. '''
return self._datetime.time()
def timetz(self):
''' Returns a ``time`` object with the same hour, minute, second, microsecond and tzinfo. '''
return self._datetime.timetz()
def astimezone(self, tz):
''' Returns a ``datetime`` object, adjusted to the specified tzinfo.
:param tz: a ``tzinfo`` object.
'''
return self._datetime.astimezone(tz)
def utcoffset(self):
''' Returns a ``timedelta`` object representing the whole number of minutes difference from UTC time. '''
return self._datetime.utcoffset()
def dst(self):
''' Returns the daylight savings time adjustment. '''
return self._datetime.dst()
def timetuple(self):
''' Returns a ``time.struct_time``, in the current timezone. '''
return self._datetime.timetuple()
def utctimetuple(self):
''' Returns a ``time.struct_time``, in UTC time. '''
return self._datetime.utctimetuple()
def toordinal(self):
''' Returns the proleptic Gregorian ordinal of the date. '''
return self._datetime.toordinal()
def weekday(self):
''' Returns the day of the week as an integer (0-6). '''
return self._datetime.weekday()
def isoweekday(self):
''' Returns the ISO day of the week as an integer (1-7). '''
return self._datetime.isoweekday()
def isocalendar(self):
''' Returns a 3-tuple, (ISO year, ISO week number, ISO weekday). '''
return self._datetime.isocalendar()
def isoformat(self, sep='T'):
'''Returns an ISO 8601 formatted representation of the date and time. '''
return self._datetime.isoformat(sep)
def ctime(self):
''' Returns a ctime formatted representation of the date and time. '''
return self._datetime.ctime()
def strftime(self, format):
''' Formats in the style of ``datetime.strptime``.
:param format: the format string.
'''
return self._datetime.strftime(format)
def for_json(self):
'''Serializes for the ``for_json`` protocol of simplejson.'''
return self.isoformat()
# internal tools.
@staticmethod
def _get_tzinfo(tz_expr):
if tz_expr is None:
return dateutil_tz.tzutc()
if isinstance(tz_expr, tzinfo):
return tz_expr
else:
try:
return parser.TzinfoParser.parse(tz_expr)
except parser.ParserError:
raise ValueError('\'{0}\' not recognized as a timezone'.format(
tz_expr))
@classmethod
def _get_datetime(cls, expr):
if isinstance(expr, Arrow):
return expr.datetime
if isinstance(expr, datetime):
return expr
try:
expr = float(expr)
return cls.utcfromtimestamp(expr).datetime
except:
raise ValueError(
'\'{0}\' not recognized as a timestamp or datetime'.format(expr))
@classmethod
def _get_frames(cls, name):
if name in cls._ATTRS:
return name, '{0}s'.format(name), 1
elif name in ['week', 'weeks']:
return 'week', 'weeks', 1
elif name in ['quarter', 'quarters']:
return 'quarter', 'months', 3
raise AttributeError()
@classmethod
def _get_iteration_params(cls, end, limit):
if end is None:
if limit is None:
raise Exception('one of \'end\' or \'limit\' is required')
return cls.max, limit
else:
if limit is None:
return end, sys.maxsize
return end, limit
@staticmethod
def _get_timestamp_from_input(timestamp):
try:
return float(timestamp)
except:
raise ValueError('cannot parse \'{0}\' as a timestamp'.format(timestamp))
Arrow.min = Arrow.fromdatetime(datetime.min)
Arrow.max = Arrow.fromdatetime(datetime.max)
|