some new features

.venv/lib/python3.12/site-packages/statsmodels/datasets/interest_inflation/data.py

@@ -0,0 +1,64 @@
+"""(West) German interest and inflation rate 1972-1998"""
+from statsmodels.datasets import utils as du
+
+__docformat__ = 'restructuredtext'
+
+COPYRIGHT = """..."""  # TODO
+TITLE = __doc__
+SOURCE = """
+http://www.jmulti.de/download/datasets/e6.dat
+"""
+
+DESCRSHORT = """(West) German interest and inflation rate 1972Q2 - 1998Q4"""
+
+DESCRLONG = """West German (until 1990) / German (afterwards) interest and
+inflation rate 1972Q2 - 1998Q4
+"""
+
+
+NOTE = """::
+    Number of Observations - 107
+
+    Number of Variables - 2
+
+    Variable name definitions::
+
+        year      - 1972q2 - 1998q4
+        quarter   - 1-4
+        Dp        - Delta log gdp deflator
+        R         - nominal long term interest rate
+"""
+
+variable_names = ["Dp", "R"]
+first_season = 1  # 1 stands for: first observation in Q2 (0 would mean Q1)
+
+
+def load():
+    """
+    Load the West German interest/inflation data and return a Dataset class.
+
+    Returns
+    -------
+    Dataset
+        See DATASET_PROPOSAL.txt for more information.
+
+    Notes
+    -----
+    The interest_inflation Dataset instance does not contain endog and exog
+    attributes.
+    """
+    return load_pandas()
+
+
+def load_pandas():
+    data = _get_data()
+    names = data.columns
+    dataset = du.Dataset(data=data, names=names)
+    return dataset
+
+
+def _get_data():
+    return du.load_csv(__file__, 'E6.csv', convert_float=True)
+
+def __str__():
+    return "e6"