Simple library for complicated date cycling rules
Project description
datecycles
Simple library for complicated date cycling rules
Installation
pip install --upgrade datecycles
"Documentation"
Currently there is no proper documentation, but the code is somewhat commented, there are examples at the end of this README, there are bunch of tests and here's explanations for the parameters:
datecycles(
every_n,
unit,
day=None,
weekday=None,
start=None,
end=None,
count=None,
shift_to_workday=None,
country=None,
holidays=None,
tzinfo=None,
)
every_n: int
defines the cycle interval.
unit: str
defines the interval unit / cycle duration. Allowed values:
"day", "week", "month", "year"
.
day: Optional[int]
defines the day of month that is requested. Cannot be used
with weekday
.
start: Optional[arrow.arrow.Arrow]
defines the minimum date.
end: Optional[arrow.arrow.Arrow]
defines the maximum date. Can be used with
count
.
count: Optional[int]
defines maximum number of results returned. Can be used
with end
.
shift_to_workday: Optional[str]
defines how to handle results that are at
weekends or holidays. "next"
finds the next workday, "previous"
finds the
previous workday, "skip"
skips the result completely, None
returns the
result as is without shifting the date.
country: str
defines the country to be used for holidays. Allowed values
are those that can be found in Python
holidays library. For example,
holidays.Finland
and holidays.FI
both exist so values "Finland"
and "FI"
are both valid values.
holidays: Union[dict, list]
defines the holidays. Can't be used with
country
. If some custom holidays must be combined with country's holidays,
see holidays documentation
regarding adding custom holidays.
tzinfo: str
defines the timezone used in results. start
and end
must also
have the same timezone that's defined here. Allowed values are those that
arrow accepts as a timezone.
Usage
Importing:
# Import the function
from datecycles import datecycles
Example 1
Cycle every month on 2nd day, starting from 2021-07-10, take 5 first results
datecycles(
1,
"month",
day=2,
start=arrow.get(2021, 7, 10),
count=5
)
# [<Arrow [2021-08-02T00:00:00+00:00]>,
# <Arrow [2021-09-02T00:00:00+00:00]>,
# <Arrow [2021-10-02T00:00:00+00:00]>,
# <Arrow [2021-11-02T00:00:00+00:00]>,
# <Arrow [2021-12-02T00:00:00+00:00]>]
Example 2
Cycle every month on first friday, starting from 2021-07-10 until end of year
datecycles(
1,
"month",
weekday=(0, False, "friday"),
start=arrow.get(2021, 7, 10),
end=arrow.get(2021, 12, 31)
)
# [<Arrow [2021-08-06T00:00:00+00:00]>,
# <Arrow [2021-09-03T00:00:00+00:00]>,
# <Arrow [2021-10-01T00:00:00+00:00]>,
# <Arrow [2021-11-05T00:00:00+00:00]>,
# <Arrow [2021-12-03T00:00:00+00:00]>]
Example 3
Cycle every month on first friday that appears in a full week, starting from 2021-07-10 until end of year
datecycles(
1,
"month",
weekday=(0, True, "friday"),
start=arrow.get(2021, 7, 10),
end=arrow.get(2021, 12, 31)
)
# [<Arrow [2021-08-06T00:00:00+00:00]>,
# <Arrow [2021-09-10T00:00:00+00:00]>,
# <Arrow [2021-10-08T00:00:00+00:00]>,
# <Arrow [2021-11-05T00:00:00+00:00]>,
# <Arrow [2021-12-10T00:00:00+00:00]>]
Example 4
Cycle every 3rd month on last friday that appears in a full week, starting from 2021-09-01, take 4 first results
datecycles(
3,
"month",
weekday=(-1, True, "friday"),
start=arrow.get(2021, 9, 1),
count=4
)
# [<Arrow [2021-09-24T00:00:00+00:00]>,
# <Arrow [2021-12-24T00:00:00+00:00]>,
# <Arrow [2022-03-25T00:00:00+00:00]>,
# <Arrow [2022-06-24T00:00:00+00:00]>]
Example 5
Cycle every 3rd month on last friday that appears in a full week, starting from 2021-09-01, take 4 first results, in case the result is a weekend day or holiday in Finland, go to the next workday
datecycles(
3,
"month",
weekday=(-1, True, "friday"),
start=arrow.get(2021, 9, 1),
count=4,
shift_to_workday="next",
country="Finland"
)
# [<Arrow [2021-09-24T00:00:00+00:00]>,
# <Arrow [2021-12-27T00:00:00+00:00]>,
# <Arrow [2022-03-25T00:00:00+00:00]>,
# <Arrow [2022-06-27T00:00:00+00:00]>]
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