diff env/lib/python3.7/site-packages/dateutil/easter.py @ 5:9b1c78e6ba9c draft default tip

"planemo upload commit 6c0a8142489327ece472c84e558c47da711a9142"
author shellac
date Mon, 01 Jun 2020 08:59:25 -0400
parents 79f47841a781
children
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--- a/env/lib/python3.7/site-packages/dateutil/easter.py	Thu May 14 16:47:39 2020 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,89 +0,0 @@
-# -*- coding: utf-8 -*-
-"""
-This module offers a generic easter computing method for any given year, using
-Western, Orthodox or Julian algorithms.
-"""
-
-import datetime
-
-__all__ = ["easter", "EASTER_JULIAN", "EASTER_ORTHODOX", "EASTER_WESTERN"]
-
-EASTER_JULIAN = 1
-EASTER_ORTHODOX = 2
-EASTER_WESTERN = 3
-
-
-def easter(year, method=EASTER_WESTERN):
-    """
-    This method was ported from the work done by GM Arts,
-    on top of the algorithm by Claus Tondering, which was
-    based in part on the algorithm of Ouding (1940), as
-    quoted in "Explanatory Supplement to the Astronomical
-    Almanac", P.  Kenneth Seidelmann, editor.
-
-    This algorithm implements three different easter
-    calculation methods:
-
-    1 - Original calculation in Julian calendar, valid in
-        dates after 326 AD
-    2 - Original method, with date converted to Gregorian
-        calendar, valid in years 1583 to 4099
-    3 - Revised method, in Gregorian calendar, valid in
-        years 1583 to 4099 as well
-
-    These methods are represented by the constants:
-
-    * ``EASTER_JULIAN   = 1``
-    * ``EASTER_ORTHODOX = 2``
-    * ``EASTER_WESTERN  = 3``
-
-    The default method is method 3.
-
-    More about the algorithm may be found at:
-
-    `GM Arts: Easter Algorithms <http://www.gmarts.org/index.php?go=415>`_
-
-    and
-
-    `The Calendar FAQ: Easter <https://www.tondering.dk/claus/cal/easter.php>`_
-
-    """
-
-    if not (1 <= method <= 3):
-        raise ValueError("invalid method")
-
-    # g - Golden year - 1
-    # c - Century
-    # h - (23 - Epact) mod 30
-    # i - Number of days from March 21 to Paschal Full Moon
-    # j - Weekday for PFM (0=Sunday, etc)
-    # p - Number of days from March 21 to Sunday on or before PFM
-    #     (-6 to 28 methods 1 & 3, to 56 for method 2)
-    # e - Extra days to add for method 2 (converting Julian
-    #     date to Gregorian date)
-
-    y = year
-    g = y % 19
-    e = 0
-    if method < 3:
-        # Old method
-        i = (19*g + 15) % 30
-        j = (y + y//4 + i) % 7
-        if method == 2:
-            # Extra dates to convert Julian to Gregorian date
-            e = 10
-            if y > 1600:
-                e = e + y//100 - 16 - (y//100 - 16)//4
-    else:
-        # New method
-        c = y//100
-        h = (c - c//4 - (8*c + 13)//25 + 19*g + 15) % 30
-        i = h - (h//28)*(1 - (h//28)*(29//(h + 1))*((21 - g)//11))
-        j = (y + y//4 + i + 2 - c + c//4) % 7
-
-    # p can be from -6 to 56 corresponding to dates 22 March to 23 May
-    # (later dates apply to method 2, although 23 May never actually occurs)
-    p = i - j + e
-    d = 1 + (p + 27 + (p + 6)//40) % 31
-    m = 3 + (p + 26)//30
-    return datetime.date(int(y), int(m), int(d))