Periodic func

.gitignore

@@ -15,6 +15,11 @@
 *.xlsx
 *.zip
 
+# Notebooks shall be stored in .py or .R-format.
+# See https://adr.ssb.no/0020-lagringsformat-for-jupyter-notebooks/
+*.ipynb
+
+
 # The section below is from the GitHub .gitignore template for Python:
 # https://raw.githubusercontent.com/github/gitignore/main/Python.gitignore
 
@@ -204,18 +209,7 @@ rsconnect/
 
 # ignore poetry in .config
 .poetry/**
-/.python-version
-/.pytype/
-/docs/_build/
-
-# Visual Studio Code
-.vscode/*
-!.vscode/settings.json
-!.vscode/tasks.json
-!.vscode/launch.json
-!.vscode/extensions.json
-!.vscode/*.code-snippets
-# Local History for Visual Studio Code
-.history/
-# Built Visual Studio Code Extensions
-*.vsix
+
+# Blaise specific ignores
+*.bdix
+*.bdbx

docs/ssb_konjunk.rst

@@ -49,3 +49,11 @@ ssb\_konjunk.xml\_handling module
    :members:
    :undoc-members:
    :show-inheritance:
+
+ssb\_konjunk.rounding module
+---------------------------------
+
+.. automodule:: ssb_konjunk.rounding
+   :members:
+   :undoc-members:
+   :show-inheritance:

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "ssb-konjunk"
-version = "0.1.9"
+version = "0.1.10"
 description = "SSB Konjunk"
 authors = ["Edvard Garmannslund <[email protected]>"]
 license = "MIT"

src/ssb_konjunk/timestamp.py

@@ -263,3 +263,26 @@ def get_ssb_timestamp(*args: int, frequency: str = "M") -> str | None:
                 return _get_timestamp_yearly(*valid_args)
             else:
                 return _get_timestamp_special(*valid_args, frequency=frequency)
+
+
+def check_periodic_year(year: int, cycle_year: int, period: int) -> bool:
+    """Check if a year is a part of a periodic cycle.
+
+    An example of use: a functionality should be performed every third
+    year, starting in year 2021. I.e. not in 2022 and 2023, but in
+    2024. Then this function should return True when passing
+    2024 as the year argument, 2021 (or 2015, 2018, 2024 and so) is
+    passed as the cycle year and period is passed as 3 (triennal period).
+
+    Args:
+        year: the year to check.
+        cycle_year: a year in the cycle.
+        period: the number of years in a period.
+
+    Returns:
+        bool: whether or not the year is part of the triennal cycle.
+    """
+    if abs(year - cycle_year) % period == 0:
+        return True
+    else:
+        return False

tests/test_timestamp.py

@@ -14,6 +14,7 @@
 from ssb_konjunk.timestamp import _get_timestamp_daily
 from ssb_konjunk.timestamp import _get_timestamp_special
 from ssb_konjunk.timestamp import _get_timestamp_yearly
+from ssb_konjunk.timestamp import check_periodic_year
 from ssb_konjunk.timestamp import get_ssb_timestamp
 
 
@@ -173,3 +174,12 @@ def test_check_valid_year() -> None:
         match=f"The order of args is start date and then end date. Therefore first year arg can not be bigger than the last. Your args are start year:{year1}  end year:{year2}.",
     ):
         _check_valid_year(year1, year2)
+
+
+def test_check_periodic_year() -> None:
+    """Test of function check_periodic_year."""
+    assert check_periodic_year(2024, 2021, 3)
+    assert not check_periodic_year(2024, 2021, 2)
+    assert check_periodic_year(2021, 2024, 3)
+    assert check_periodic_year(2021, 2021, 3)
+    assert check_periodic_year(2021, 2022, 1)