490 lines
15 KiB
Python
490 lines
15 KiB
Python
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import numpy as np
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import pytest
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from pandas.errors import (
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SpecificationError,
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UnsupportedFunctionCall,
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)
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from pandas import (
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DataFrame,
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Index,
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MultiIndex,
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Period,
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Series,
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Timestamp,
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concat,
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date_range,
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timedelta_range,
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)
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import pandas._testing as tm
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def test_getitem(step):
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frame = DataFrame(np.random.randn(5, 5))
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r = frame.rolling(window=5, step=step)
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tm.assert_index_equal(r._selected_obj.columns, frame[::step].columns)
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r = frame.rolling(window=5, step=step)[1]
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assert r._selected_obj.name == frame[::step].columns[1]
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# technically this is allowed
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r = frame.rolling(window=5, step=step)[1, 3]
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tm.assert_index_equal(r._selected_obj.columns, frame[::step].columns[[1, 3]])
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r = frame.rolling(window=5, step=step)[[1, 3]]
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tm.assert_index_equal(r._selected_obj.columns, frame[::step].columns[[1, 3]])
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def test_select_bad_cols():
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df = DataFrame([[1, 2]], columns=["A", "B"])
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g = df.rolling(window=5)
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with pytest.raises(KeyError, match="Columns not found: 'C'"):
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g[["C"]]
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with pytest.raises(KeyError, match="^[^A]+$"):
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# A should not be referenced as a bad column...
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# will have to rethink regex if you change message!
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g[["A", "C"]]
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def test_attribute_access():
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df = DataFrame([[1, 2]], columns=["A", "B"])
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r = df.rolling(window=5)
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tm.assert_series_equal(r.A.sum(), r["A"].sum())
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msg = "'Rolling' object has no attribute 'F'"
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with pytest.raises(AttributeError, match=msg):
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r.F
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def tests_skip_nuisance(step):
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df = DataFrame({"A": range(5), "B": range(5, 10), "C": "foo"})
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r = df.rolling(window=3, step=step)
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result = r[["A", "B"]].sum()
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expected = DataFrame(
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{"A": [np.nan, np.nan, 3, 6, 9], "B": [np.nan, np.nan, 18, 21, 24]},
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columns=list("AB"),
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)[::step]
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tm.assert_frame_equal(result, expected)
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def test_skip_sum_object_raises(step):
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df = DataFrame({"A": range(5), "B": range(5, 10), "C": "foo"})
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r = df.rolling(window=3, step=step)
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msg = r"nuisance columns.*Dropped columns were Index\(\['C'\], dtype='object'\)"
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with tm.assert_produces_warning(FutureWarning, match=msg):
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# GH#42738
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result = r.sum()
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expected = DataFrame(
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{"A": [np.nan, np.nan, 3, 6, 9], "B": [np.nan, np.nan, 18, 21, 24]},
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columns=list("AB"),
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)[::step]
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tm.assert_frame_equal(result, expected)
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def test_agg(step):
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df = DataFrame({"A": range(5), "B": range(0, 10, 2)})
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r = df.rolling(window=3, step=step)
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a_mean = r["A"].mean()
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a_std = r["A"].std()
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a_sum = r["A"].sum()
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b_mean = r["B"].mean()
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b_std = r["B"].std()
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result = r.aggregate([np.mean, np.std])
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expected = concat([a_mean, a_std, b_mean, b_std], axis=1)
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expected.columns = MultiIndex.from_product([["A", "B"], ["mean", "std"]])
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tm.assert_frame_equal(result, expected)
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result = r.aggregate({"A": np.mean, "B": np.std})
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expected = concat([a_mean, b_std], axis=1)
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tm.assert_frame_equal(result, expected, check_like=True)
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result = r.aggregate({"A": ["mean", "std"]})
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expected = concat([a_mean, a_std], axis=1)
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expected.columns = MultiIndex.from_tuples([("A", "mean"), ("A", "std")])
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tm.assert_frame_equal(result, expected)
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result = r["A"].aggregate(["mean", "sum"])
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expected = concat([a_mean, a_sum], axis=1)
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expected.columns = ["mean", "sum"]
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tm.assert_frame_equal(result, expected)
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msg = "nested renamer is not supported"
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with pytest.raises(SpecificationError, match=msg):
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# using a dict with renaming
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r.aggregate({"A": {"mean": "mean", "sum": "sum"}})
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with pytest.raises(SpecificationError, match=msg):
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r.aggregate(
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{"A": {"mean": "mean", "sum": "sum"}, "B": {"mean2": "mean", "sum2": "sum"}}
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)
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result = r.aggregate({"A": ["mean", "std"], "B": ["mean", "std"]})
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expected = concat([a_mean, a_std, b_mean, b_std], axis=1)
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exp_cols = [("A", "mean"), ("A", "std"), ("B", "mean"), ("B", "std")]
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expected.columns = MultiIndex.from_tuples(exp_cols)
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tm.assert_frame_equal(result, expected, check_like=True)
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@pytest.mark.parametrize(
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"func", [["min"], ["mean", "max"], {"b": "sum"}, {"b": "prod", "c": "median"}]
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)
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def test_multi_axis_1_raises(func):
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# GH#46904
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df = DataFrame({"a": [1, 1, 2], "b": [3, 4, 5], "c": [6, 7, 8]})
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r = df.rolling(window=3, axis=1)
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with pytest.raises(NotImplementedError, match="axis other than 0 is not supported"):
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r.agg(func)
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def test_agg_apply(raw):
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# passed lambda
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df = DataFrame({"A": range(5), "B": range(0, 10, 2)})
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r = df.rolling(window=3)
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a_sum = r["A"].sum()
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result = r.agg({"A": np.sum, "B": lambda x: np.std(x, ddof=1)})
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rcustom = r["B"].apply(lambda x: np.std(x, ddof=1), raw=raw)
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expected = concat([a_sum, rcustom], axis=1)
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tm.assert_frame_equal(result, expected, check_like=True)
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def test_agg_consistency(step):
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df = DataFrame({"A": range(5), "B": range(0, 10, 2)})
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r = df.rolling(window=3, step=step)
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result = r.agg([np.sum, np.mean]).columns
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expected = MultiIndex.from_product([list("AB"), ["sum", "mean"]])
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tm.assert_index_equal(result, expected)
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result = r["A"].agg([np.sum, np.mean]).columns
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expected = Index(["sum", "mean"])
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tm.assert_index_equal(result, expected)
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result = r.agg({"A": [np.sum, np.mean]}).columns
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expected = MultiIndex.from_tuples([("A", "sum"), ("A", "mean")])
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tm.assert_index_equal(result, expected)
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def test_agg_nested_dicts():
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# API change for disallowing these types of nested dicts
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df = DataFrame({"A": range(5), "B": range(0, 10, 2)})
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r = df.rolling(window=3)
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msg = "nested renamer is not supported"
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with pytest.raises(SpecificationError, match=msg):
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r.aggregate({"r1": {"A": ["mean", "sum"]}, "r2": {"B": ["mean", "sum"]}})
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expected = concat(
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[r["A"].mean(), r["A"].std(), r["B"].mean(), r["B"].std()], axis=1
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)
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expected.columns = MultiIndex.from_tuples(
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[("ra", "mean"), ("ra", "std"), ("rb", "mean"), ("rb", "std")]
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)
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with pytest.raises(SpecificationError, match=msg):
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r[["A", "B"]].agg({"A": {"ra": ["mean", "std"]}, "B": {"rb": ["mean", "std"]}})
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with pytest.raises(SpecificationError, match=msg):
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r.agg({"A": {"ra": ["mean", "std"]}, "B": {"rb": ["mean", "std"]}})
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def test_count_nonnumeric_types(step):
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# GH12541
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cols = [
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"int",
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"float",
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"string",
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"datetime",
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"timedelta",
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"periods",
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"fl_inf",
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"fl_nan",
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"str_nan",
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"dt_nat",
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"periods_nat",
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]
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dt_nat_col = [Timestamp("20170101"), Timestamp("20170203"), Timestamp(None)]
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df = DataFrame(
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{
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"int": [1, 2, 3],
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"float": [4.0, 5.0, 6.0],
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"string": list("abc"),
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"datetime": date_range("20170101", periods=3),
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"timedelta": timedelta_range("1 s", periods=3, freq="s"),
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"periods": [
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Period("2012-01"),
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Period("2012-02"),
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Period("2012-03"),
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],
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"fl_inf": [1.0, 2.0, np.Inf],
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"fl_nan": [1.0, 2.0, np.NaN],
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"str_nan": ["aa", "bb", np.NaN],
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"dt_nat": dt_nat_col,
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"periods_nat": [
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Period("2012-01"),
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Period("2012-02"),
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Period(None),
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],
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},
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columns=cols,
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)
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expected = DataFrame(
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{
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"int": [1.0, 2.0, 2.0],
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"float": [1.0, 2.0, 2.0],
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"string": [1.0, 2.0, 2.0],
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"datetime": [1.0, 2.0, 2.0],
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"timedelta": [1.0, 2.0, 2.0],
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"periods": [1.0, 2.0, 2.0],
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"fl_inf": [1.0, 2.0, 2.0],
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"fl_nan": [1.0, 2.0, 1.0],
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"str_nan": [1.0, 2.0, 1.0],
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"dt_nat": [1.0, 2.0, 1.0],
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"periods_nat": [1.0, 2.0, 1.0],
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},
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columns=cols,
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)[::step]
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result = df.rolling(window=2, min_periods=0, step=step).count()
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tm.assert_frame_equal(result, expected)
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result = df.rolling(1, min_periods=0, step=step).count()
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expected = df.notna().astype(float)[::step]
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tm.assert_frame_equal(result, expected)
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def test_preserve_metadata():
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# GH 10565
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s = Series(np.arange(100), name="foo")
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s2 = s.rolling(30).sum()
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s3 = s.rolling(20).sum()
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assert s2.name == "foo"
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assert s3.name == "foo"
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@pytest.mark.parametrize(
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"func,window_size,expected_vals",
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[
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(
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"rolling",
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2,
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[
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[np.nan, np.nan, np.nan, np.nan],
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[15.0, 20.0, 25.0, 20.0],
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[25.0, 30.0, 35.0, 30.0],
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[np.nan, np.nan, np.nan, np.nan],
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[20.0, 30.0, 35.0, 30.0],
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[35.0, 40.0, 60.0, 40.0],
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[60.0, 80.0, 85.0, 80],
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],
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),
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(
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"expanding",
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None,
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[
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[10.0, 10.0, 20.0, 20.0],
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[15.0, 20.0, 25.0, 20.0],
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[20.0, 30.0, 30.0, 20.0],
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[10.0, 10.0, 30.0, 30.0],
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[20.0, 30.0, 35.0, 30.0],
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[26.666667, 40.0, 50.0, 30.0],
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[40.0, 80.0, 60.0, 30.0],
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],
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),
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],
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)
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def test_multiple_agg_funcs(func, window_size, expected_vals):
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# GH 15072
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df = DataFrame(
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[
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["A", 10, 20],
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["A", 20, 30],
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["A", 30, 40],
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["B", 10, 30],
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["B", 30, 40],
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["B", 40, 80],
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["B", 80, 90],
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],
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columns=["stock", "low", "high"],
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)
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f = getattr(df.groupby("stock"), func)
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if window_size:
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window = f(window_size)
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else:
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window = f()
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index = MultiIndex.from_tuples(
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[("A", 0), ("A", 1), ("A", 2), ("B", 3), ("B", 4), ("B", 5), ("B", 6)],
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names=["stock", None],
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)
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columns = MultiIndex.from_tuples(
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[("low", "mean"), ("low", "max"), ("high", "mean"), ("high", "min")]
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)
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expected = DataFrame(expected_vals, index=index, columns=columns)
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result = window.agg({"low": ["mean", "max"], "high": ["mean", "min"]})
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tm.assert_frame_equal(result, expected)
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def test_is_datetimelike_deprecated():
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s = Series(range(1)).rolling(1)
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with tm.assert_produces_warning(FutureWarning):
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assert not s.is_datetimelike
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def test_validate_deprecated():
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s = Series(range(1)).rolling(1)
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with tm.assert_produces_warning(FutureWarning):
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assert s.validate() is None
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|
|
|
||
|
|
|
||
|
|
@pytest.mark.filterwarnings("ignore:min_periods:FutureWarning")
|
||
|
|
def test_dont_modify_attributes_after_methods(
|
||
|
|
arithmetic_win_operators, closed, center, min_periods, step
|
||
|
|
):
|
||
|
|
# GH 39554
|
||
|
|
roll_obj = Series(range(1)).rolling(
|
||
|
|
1, center=center, closed=closed, min_periods=min_periods, step=step
|
||
|
|
)
|
||
|
|
expected = {attr: getattr(roll_obj, attr) for attr in roll_obj._attributes}
|
||
|
|
getattr(roll_obj, arithmetic_win_operators)()
|
||
|
|
result = {attr: getattr(roll_obj, attr) for attr in roll_obj._attributes}
|
||
|
|
assert result == expected
|
||
|
|
|
||
|
|
|
||
|
|
def test_centered_axis_validation(step):
|
||
|
|
|
||
|
|
# ok
|
||
|
|
Series(np.ones(10)).rolling(window=3, center=True, axis=0, step=step).mean()
|
||
|
|
|
||
|
|
# bad axis
|
||
|
|
msg = "No axis named 1 for object type Series"
|
||
|
|
with pytest.raises(ValueError, match=msg):
|
||
|
|
Series(np.ones(10)).rolling(window=3, center=True, axis=1, step=step).mean()
|
||
|
|
|
||
|
|
# ok ok
|
||
|
|
DataFrame(np.ones((10, 10))).rolling(
|
||
|
|
window=3, center=True, axis=0, step=step
|
||
|
|
).mean()
|
||
|
|
DataFrame(np.ones((10, 10))).rolling(
|
||
|
|
window=3, center=True, axis=1, step=step
|
||
|
|
).mean()
|
||
|
|
|
||
|
|
# bad axis
|
||
|
|
msg = "No axis named 2 for object type DataFrame"
|
||
|
|
with pytest.raises(ValueError, match=msg):
|
||
|
|
(
|
||
|
|
DataFrame(np.ones((10, 10)))
|
||
|
|
.rolling(window=3, center=True, axis=2, step=step)
|
||
|
|
.mean()
|
||
|
|
)
|
||
|
|
|
||
|
|
|
||
|
|
def test_rolling_min_min_periods(step):
|
||
|
|
a = Series([1, 2, 3, 4, 5])
|
||
|
|
result = a.rolling(window=100, min_periods=1, step=step).min()
|
||
|
|
expected = Series(np.ones(len(a)))[::step]
|
||
|
|
tm.assert_series_equal(result, expected)
|
||
|
|
msg = "min_periods 5 must be <= window 3"
|
||
|
|
with pytest.raises(ValueError, match=msg):
|
||
|
|
Series([1, 2, 3]).rolling(window=3, min_periods=5, step=step).min()
|
||
|
|
|
||
|
|
|
||
|
|
def test_rolling_max_min_periods(step):
|
||
|
|
a = Series([1, 2, 3, 4, 5], dtype=np.float64)
|
||
|
|
result = a.rolling(window=100, min_periods=1, step=step).max()
|
||
|
|
expected = a[::step]
|
||
|
|
tm.assert_almost_equal(result, expected)
|
||
|
|
msg = "min_periods 5 must be <= window 3"
|
||
|
|
with pytest.raises(ValueError, match=msg):
|
||
|
|
Series([1, 2, 3]).rolling(window=3, min_periods=5, step=step).max()
|
||
|
|
|
||
|
|
|
||
|
|
@pytest.mark.parametrize(
|
||
|
|
"roll_type, class_name",
|
||
|
|
[
|
||
|
|
("rolling", "Rolling"),
|
||
|
|
("expanding", "Expanding"),
|
||
|
|
("ewm", "ExponentialMovingWindow"),
|
||
|
|
],
|
||
|
|
)
|
||
|
|
@pytest.mark.parametrize(
|
||
|
|
"kernel, has_args, raises",
|
||
|
|
[
|
||
|
|
("sum", True, True),
|
||
|
|
("max", True, True),
|
||
|
|
("min", True, True),
|
||
|
|
("mean", True, True),
|
||
|
|
("median", False, False),
|
||
|
|
("std", True, True),
|
||
|
|
("var", True, True),
|
||
|
|
("skew", False, False),
|
||
|
|
("sem", True, True),
|
||
|
|
("kurt", False, False),
|
||
|
|
("quantile", False, False),
|
||
|
|
("rank", False, False),
|
||
|
|
("cov", False, False),
|
||
|
|
("corr", False, False),
|
||
|
|
],
|
||
|
|
)
|
||
|
|
def test_args_kwargs_depr(roll_type, class_name, kernel, has_args, raises):
|
||
|
|
# GH#47836
|
||
|
|
r = getattr(Series([2, 4, 6]), roll_type)(2)
|
||
|
|
error_msg = "numpy operations are not valid with window objects"
|
||
|
|
if kernel == "quantile":
|
||
|
|
required_args = (0.5,)
|
||
|
|
else:
|
||
|
|
required_args = ()
|
||
|
|
|
||
|
|
if roll_type == "ewm" and kernel not in (
|
||
|
|
"sum",
|
||
|
|
"mean",
|
||
|
|
"std",
|
||
|
|
"var",
|
||
|
|
"cov",
|
||
|
|
"corr",
|
||
|
|
):
|
||
|
|
# kernels not implemented for ewm
|
||
|
|
with pytest.raises(AttributeError, match=f"has no attribute '{kernel}'"):
|
||
|
|
getattr(r, kernel)
|
||
|
|
else:
|
||
|
|
warn_msg = f"Passing additional kwargs to {class_name}.{kernel}"
|
||
|
|
with tm.assert_produces_warning(FutureWarning, match=warn_msg):
|
||
|
|
if raises:
|
||
|
|
with pytest.raises(UnsupportedFunctionCall, match=error_msg):
|
||
|
|
getattr(r, kernel)(*required_args, dtype=np.float64)
|
||
|
|
else:
|
||
|
|
getattr(r, kernel)(*required_args, dtype=np.float64)
|
||
|
|
|
||
|
|
if has_args:
|
||
|
|
warn_msg = f"Passing additional args to {class_name}.{kernel}"
|
||
|
|
with tm.assert_produces_warning(FutureWarning, match=warn_msg):
|
||
|
|
# sem raises for rolling but not expanding
|
||
|
|
if raises and (roll_type != "expanding" or kernel != "sem"):
|
||
|
|
with pytest.raises(UnsupportedFunctionCall, match=error_msg):
|
||
|
|
getattr(r, kernel)(*required_args, 1, 2, 3, 4)
|
||
|
|
else:
|
||
|
|
getattr(r, kernel)(*required_args, 1, 2, 3, 4)
|
||
|
|
|
||
|
|
warn_msg = f"Passing additional args and kwargs to {class_name}.{kernel}"
|
||
|
|
with tm.assert_produces_warning(FutureWarning, match=warn_msg):
|
||
|
|
if raises:
|
||
|
|
with pytest.raises(UnsupportedFunctionCall, match=error_msg):
|
||
|
|
getattr(r, kernel)(*required_args, 1, 2, 3, 4, dtype=np.float64)
|
||
|
|
else:
|
||
|
|
getattr(r, kernel)(*required_args, 1, 2, 3, 4, dtype=np.float64)
|