dateutilrruleset：如何正確組合EXRULE和RDATE？

我有rruleset一個每日重復規則，現在我試圖將一個 RDATE 與一個 EXRULE 結合起來。

from dateutil.rrule import rruleset, rrule, DAILY, FR

rules = rruleset()
daily = rrule(freq=DAILY, dtstart=datetime(2022, 10, 12))
rules.rrule(daily)
not_on_friday = rrule(freq=DAILY, byweekday=FR, dtstart=datetime(2022, 10, 12))
but_on_friday_21th = datetime(2022, 10, 21)
rules.exrule(not_on_friday)
rules.rdate(but_on_friday_21th)
rules.between(datetime(2022,10,12), datetime(2022,10,24))

>>
[datetime.datetime(2022, 10, 13, 0, 0), 
 datetime.datetime(2022, 10, 15, 0, 0), # the 14th is excluded as expected
 datetime.datetime(2022, 10, 16, 0, 0),
 datetime.datetime(2022, 10, 17, 0, 0),
 datetime.datetime(2022, 10, 18, 0, 0),
 datetime.datetime(2022, 10, 19, 0, 0),
 datetime.datetime(2022, 10, 20, 0, 0), 
 datetime.datetime(2022, 10, 22, 0, 0), # but the 21th is also excluded
 datetime.datetime(2022, 10, 23, 0, 0)]

現在，令人困惑的是，當我將 EXRULE 與 EXDATE 結合使用時，它可以作業：

rules = rruleset()
daily = rrule(freq=DAILY, dtstart=datetime(2022, 10, 12))
rules.rrule(daily)
not_on_friday = rrule(freq=DAILY, byweekday=FR, dtstart=datetime(2022, 10, 12))
but_also_not_on_the_22th_a_saturday = datetime(2022, 10, 22)
rules.exrule(not_on_friday)
rules.exdate(but_also_not_on_the_22th_a_saturday)
rules.between(datetime(2022,10,12), datetime(2022,10,24))

>>
[datetime.datetime(2022, 10, 13, 0, 0),
 datetime.datetime(2022, 10, 15, 0, 0), # the 14th still excluded
 datetime.datetime(2022, 10, 16, 0, 0),
 datetime.datetime(2022, 10, 17, 0, 0),
 datetime.datetime(2022, 10, 18, 0, 0),
 datetime.datetime(2022, 10, 19, 0, 0),
 datetime.datetime(2022, 10, 20, 0, 0), # the 22th also excluded as expected
 datetime.datetime(2022, 10, 23, 0, 0)]

那么，如果可能的話，如何在我的 RDATE 和 EXRULE 中結合使用rruleset？

uj5u.com熱心網友回復：

在您的回答中，您注意到最后應用了所有其他實際上確實出現在 RFC 中的exrule包容性規則。但是，至少在 中，您可以使用 an作為 的引數，因此要完成您想要的操作，您可以嘗試從傳遞給的規則中過濾掉您想要包含的日期，如下所示：dateutilrrulesetexruleexrule

from datetime import datetime
from dateutil.rrule import rruleset, rrule, DAILY, WEEKLY, FR

# Create an rruleset that defaults to every day
rules = rruleset()
daily = rrule(freq=DAILY, dtstart=datetime(2022, 10, 12))
rules.rrule(daily)

# Create an rruleset corresponding to the days we want to *exclude*: every
# Friday, except 2022-10-21
ex_set = rruleset()
ex_set.rrule(rrule(freq=WEEKLY, byweekday=FR, dtstart=datetime(2022, 10, 14)))
ex_set.exdate(datetime(2022, 10, 21))

# Use our second rule set as an exrule
rules.exrule(ex_set)

rules.between(datetime(2022,10,12), datetime(2022,10,24))

由于您要包含的日期從未出現在 中exrule，因此它不會被過濾掉：

>>> print("\n".join(map(str,
...                     map(datetime.date,
...                         rules.between(datetime(2022, 10, 12),
...                                       datetime(2022, 10, 24))))))
2022-10-13
2022-10-15
2022-10-16
2022-10-17
2022-10-18
2022-10-19
2022-10-20
2022-10-21
2022-10-22
2022-10-23

uj5u.com熱心網友回復：

EXRULE因此，顯然iCalendar 規范中沒有 an 這樣的東西。它只是RRULEs。dateutils exdate檔案字串中的函式狀態：

def exrule(self, exrule):
""" Include the given rrule instance in the recurrence set exclusion
    list. Dates which are part of the given recurrence rules will not
    be generated, even if some inclusive rrule or rdate matches them.
"""

因此，即使我添加了一個 RDATE，如果它被添加的規則排除exrule在我的出現中也不會出現。函式也是如此exdate，因此我的第二個作業示例。

標籤：Python约会时间python-dateutil

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