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1051 lines
32 KiB
Python
1051 lines
32 KiB
Python
import builtins
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from io import StringIO
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import numpy as np
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import pytest
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from pandas.errors import UnsupportedFunctionCall
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import pandas as pd
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from pandas import DataFrame, Index, MultiIndex, Series, Timestamp, date_range, isna
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import pandas._testing as tm
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import pandas.core.nanops as nanops
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from pandas.util import _test_decorators as td
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@pytest.fixture(
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params=[np.int32, np.int64, np.float32, np.float64],
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ids=["np.int32", "np.int64", "np.float32", "np.float64"],
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)
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def numpy_dtypes_for_minmax(request):
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"""
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Fixture of numpy dtypes with min and max values used for testing
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cummin and cummax
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"""
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dtype = request.param
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min_val = (
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np.iinfo(dtype).min if np.dtype(dtype).kind == "i" else np.finfo(dtype).min
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)
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max_val = (
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np.iinfo(dtype).max if np.dtype(dtype).kind == "i" else np.finfo(dtype).max
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)
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return (dtype, min_val, max_val)
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@pytest.mark.parametrize("agg_func", ["any", "all"])
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@pytest.mark.parametrize("skipna", [True, False])
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@pytest.mark.parametrize(
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"vals",
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[
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["foo", "bar", "baz"],
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["foo", "", ""],
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["", "", ""],
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[1, 2, 3],
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[1, 0, 0],
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[0, 0, 0],
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[1.0, 2.0, 3.0],
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[1.0, 0.0, 0.0],
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[0.0, 0.0, 0.0],
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[True, True, True],
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[True, False, False],
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[False, False, False],
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[np.nan, np.nan, np.nan],
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],
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)
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def test_groupby_bool_aggs(agg_func, skipna, vals):
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df = DataFrame({"key": ["a"] * 3 + ["b"] * 3, "val": vals * 2})
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# Figure out expectation using Python builtin
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exp = getattr(builtins, agg_func)(vals)
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# edge case for missing data with skipna and 'any'
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if skipna and all(isna(vals)) and agg_func == "any":
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exp = False
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exp_df = DataFrame([exp] * 2, columns=["val"], index=Index(["a", "b"], name="key"))
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result = getattr(df.groupby("key"), agg_func)(skipna=skipna)
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tm.assert_frame_equal(result, exp_df)
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def test_max_min_non_numeric():
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# #2700
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aa = DataFrame({"nn": [11, 11, 22, 22], "ii": [1, 2, 3, 4], "ss": 4 * ["mama"]})
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result = aa.groupby("nn").max()
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assert "ss" in result
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result = aa.groupby("nn").max(numeric_only=False)
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assert "ss" in result
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result = aa.groupby("nn").min()
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assert "ss" in result
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result = aa.groupby("nn").min(numeric_only=False)
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assert "ss" in result
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def test_min_date_with_nans():
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# GH26321
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dates = pd.to_datetime(
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pd.Series(["2019-05-09", "2019-05-09", "2019-05-09"]), format="%Y-%m-%d"
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).dt.date
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df = pd.DataFrame({"a": [np.nan, "1", np.nan], "b": [0, 1, 1], "c": dates})
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result = df.groupby("b", as_index=False)["c"].min()["c"]
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expected = pd.to_datetime(
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pd.Series(["2019-05-09", "2019-05-09"], name="c"), format="%Y-%m-%d"
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).dt.date
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tm.assert_series_equal(result, expected)
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result = df.groupby("b")["c"].min()
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expected.index.name = "b"
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tm.assert_series_equal(result, expected)
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def test_intercept_builtin_sum():
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s = Series([1.0, 2.0, np.nan, 3.0])
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grouped = s.groupby([0, 1, 2, 2])
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result = grouped.agg(builtins.sum)
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result2 = grouped.apply(builtins.sum)
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expected = grouped.sum()
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tm.assert_series_equal(result, expected)
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tm.assert_series_equal(result2, expected)
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# @pytest.mark.parametrize("f", [max, min, sum])
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# def test_builtins_apply(f):
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@pytest.mark.parametrize("f", [max, min, sum])
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@pytest.mark.parametrize("keys", ["jim", ["jim", "joe"]]) # Single key # Multi-key
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def test_builtins_apply(keys, f):
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# see gh-8155
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df = pd.DataFrame(np.random.randint(1, 50, (1000, 2)), columns=["jim", "joe"])
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df["jolie"] = np.random.randn(1000)
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fname = f.__name__
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result = df.groupby(keys).apply(f)
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ngroups = len(df.drop_duplicates(subset=keys))
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assert_msg = f"invalid frame shape: {result.shape} (expected ({ngroups}, 3))"
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assert result.shape == (ngroups, 3), assert_msg
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tm.assert_frame_equal(
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result, # numpy's equivalent function
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df.groupby(keys).apply(getattr(np, fname)),
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)
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if f != sum:
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expected = df.groupby(keys).agg(fname).reset_index()
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expected.set_index(keys, inplace=True, drop=False)
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tm.assert_frame_equal(result, expected, check_dtype=False)
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tm.assert_series_equal(getattr(result, fname)(), getattr(df, fname)())
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def test_arg_passthru():
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# make sure that we are passing thru kwargs
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# to our agg functions
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# GH3668
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# GH5724
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df = pd.DataFrame(
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{
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"group": [1, 1, 2],
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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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"category_string": pd.Series(list("abc")).astype("category"),
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"category_int": [7, 8, 9],
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"datetime": pd.date_range("20130101", periods=3),
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"datetimetz": pd.date_range("20130101", periods=3, tz="US/Eastern"),
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"timedelta": pd.timedelta_range("1 s", periods=3, freq="s"),
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},
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columns=[
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"group",
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"int",
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"float",
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"string",
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"category_string",
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"category_int",
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"datetime",
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"datetimetz",
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"timedelta",
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],
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)
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expected_columns_numeric = Index(["int", "float", "category_int"])
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# mean / median
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expected = pd.DataFrame(
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{
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"category_int": [7.5, 9],
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"float": [4.5, 6.0],
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"timedelta": [pd.Timedelta("1.5s"), pd.Timedelta("3s")],
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"int": [1.5, 3],
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"datetime": [
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pd.Timestamp("2013-01-01 12:00:00"),
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pd.Timestamp("2013-01-03 00:00:00"),
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],
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"datetimetz": [
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pd.Timestamp("2013-01-01 12:00:00", tz="US/Eastern"),
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pd.Timestamp("2013-01-03 00:00:00", tz="US/Eastern"),
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],
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},
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index=Index([1, 2], name="group"),
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columns=["int", "float", "category_int", "datetime", "datetimetz", "timedelta"],
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)
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for attr in ["mean", "median"]:
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result = getattr(df.groupby("group"), attr)()
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tm.assert_index_equal(result.columns, expected_columns_numeric)
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result = getattr(df.groupby("group"), attr)(numeric_only=False)
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tm.assert_frame_equal(result.reindex_like(expected), expected)
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# TODO: min, max *should* handle
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# categorical (ordered) dtype
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expected_columns = Index(
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[
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"int",
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"float",
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"string",
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"category_int",
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"datetime",
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"datetimetz",
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"timedelta",
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]
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)
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for attr in ["min", "max"]:
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result = getattr(df.groupby("group"), attr)()
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tm.assert_index_equal(result.columns, expected_columns)
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result = getattr(df.groupby("group"), attr)(numeric_only=False)
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tm.assert_index_equal(result.columns, expected_columns)
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expected_columns = Index(
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[
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"int",
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"float",
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"string",
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"category_string",
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"category_int",
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"datetime",
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"datetimetz",
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"timedelta",
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]
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)
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for attr in ["first", "last"]:
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result = getattr(df.groupby("group"), attr)()
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tm.assert_index_equal(result.columns, expected_columns)
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result = getattr(df.groupby("group"), attr)(numeric_only=False)
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tm.assert_index_equal(result.columns, expected_columns)
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expected_columns = Index(["int", "float", "string", "category_int", "timedelta"])
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result = df.groupby("group").sum()
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tm.assert_index_equal(result.columns, expected_columns_numeric)
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result = df.groupby("group").sum(numeric_only=False)
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tm.assert_index_equal(result.columns, expected_columns)
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expected_columns = Index(["int", "float", "category_int"])
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for attr in ["prod", "cumprod"]:
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result = getattr(df.groupby("group"), attr)()
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tm.assert_index_equal(result.columns, expected_columns_numeric)
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result = getattr(df.groupby("group"), attr)(numeric_only=False)
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tm.assert_index_equal(result.columns, expected_columns)
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# like min, max, but don't include strings
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expected_columns = Index(
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["int", "float", "category_int", "datetime", "datetimetz", "timedelta"]
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)
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for attr in ["cummin", "cummax"]:
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result = getattr(df.groupby("group"), attr)()
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# GH 15561: numeric_only=False set by default like min/max
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tm.assert_index_equal(result.columns, expected_columns)
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result = getattr(df.groupby("group"), attr)(numeric_only=False)
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tm.assert_index_equal(result.columns, expected_columns)
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expected_columns = Index(["int", "float", "category_int", "timedelta"])
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result = getattr(df.groupby("group"), "cumsum")()
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tm.assert_index_equal(result.columns, expected_columns_numeric)
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result = getattr(df.groupby("group"), "cumsum")(numeric_only=False)
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tm.assert_index_equal(result.columns, expected_columns)
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def test_non_cython_api():
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# GH5610
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# non-cython calls should not include the grouper
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df = DataFrame(
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[[1, 2, "foo"], [1, np.nan, "bar"], [3, np.nan, "baz"]], columns=["A", "B", "C"]
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)
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g = df.groupby("A")
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gni = df.groupby("A", as_index=False)
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# mad
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expected = DataFrame([[0], [np.nan]], columns=["B"], index=[1, 3])
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expected.index.name = "A"
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result = g.mad()
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tm.assert_frame_equal(result, expected)
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expected = DataFrame([[1, 0.0], [3, np.nan]], columns=["A", "B"], index=[0, 1])
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result = gni.mad()
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tm.assert_frame_equal(result, expected)
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# describe
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expected_index = pd.Index([1, 3], name="A")
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expected_col = pd.MultiIndex(
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levels=[["B"], ["count", "mean", "std", "min", "25%", "50%", "75%", "max"]],
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codes=[[0] * 8, list(range(8))],
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)
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expected = pd.DataFrame(
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[
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[1.0, 2.0, np.nan, 2.0, 2.0, 2.0, 2.0, 2.0],
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[0.0, np.nan, np.nan, np.nan, np.nan, np.nan, np.nan, np.nan],
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],
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index=expected_index,
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columns=expected_col,
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)
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result = g.describe()
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tm.assert_frame_equal(result, expected)
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expected = pd.concat(
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[
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df[df.A == 1].describe().unstack().to_frame().T,
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df[df.A == 3].describe().unstack().to_frame().T,
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]
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)
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expected.index = pd.Index([0, 1])
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result = gni.describe()
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tm.assert_frame_equal(result, expected)
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# any
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expected = DataFrame(
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[[True, True], [False, True]], columns=["B", "C"], index=[1, 3]
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)
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expected.index.name = "A"
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result = g.any()
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tm.assert_frame_equal(result, expected)
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# idxmax
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expected = DataFrame([[0.0], [np.nan]], columns=["B"], index=[1, 3])
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expected.index.name = "A"
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result = g.idxmax()
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tm.assert_frame_equal(result, expected)
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def test_cython_api2():
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# this takes the fast apply path
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# cumsum (GH5614)
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df = DataFrame([[1, 2, np.nan], [1, np.nan, 9], [3, 4, 9]], columns=["A", "B", "C"])
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expected = DataFrame([[2, np.nan], [np.nan, 9], [4, 9]], columns=["B", "C"])
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result = df.groupby("A").cumsum()
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tm.assert_frame_equal(result, expected)
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# GH 5755 - cumsum is a transformer and should ignore as_index
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result = df.groupby("A", as_index=False).cumsum()
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tm.assert_frame_equal(result, expected)
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# GH 13994
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result = df.groupby("A").cumsum(axis=1)
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expected = df.cumsum(axis=1)
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tm.assert_frame_equal(result, expected)
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result = df.groupby("A").cumprod(axis=1)
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expected = df.cumprod(axis=1)
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tm.assert_frame_equal(result, expected)
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def test_cython_median():
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df = DataFrame(np.random.randn(1000))
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df.values[::2] = np.nan
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labels = np.random.randint(0, 50, size=1000).astype(float)
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labels[::17] = np.nan
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result = df.groupby(labels).median()
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exp = df.groupby(labels).agg(nanops.nanmedian)
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tm.assert_frame_equal(result, exp)
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df = DataFrame(np.random.randn(1000, 5))
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rs = df.groupby(labels).agg(np.median)
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xp = df.groupby(labels).median()
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tm.assert_frame_equal(rs, xp)
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def test_median_empty_bins(observed):
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df = pd.DataFrame(np.random.randint(0, 44, 500))
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grps = range(0, 55, 5)
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bins = pd.cut(df[0], grps)
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result = df.groupby(bins, observed=observed).median()
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expected = df.groupby(bins, observed=observed).agg(lambda x: x.median())
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tm.assert_frame_equal(result, expected)
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@pytest.mark.parametrize(
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"dtype", ["int8", "int16", "int32", "int64", "float32", "float64", "uint64"]
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)
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@pytest.mark.parametrize(
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"method,data",
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[
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("first", {"df": [{"a": 1, "b": 1}, {"a": 2, "b": 3}]}),
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("last", {"df": [{"a": 1, "b": 2}, {"a": 2, "b": 4}]}),
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("min", {"df": [{"a": 1, "b": 1}, {"a": 2, "b": 3}]}),
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("max", {"df": [{"a": 1, "b": 2}, {"a": 2, "b": 4}]}),
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("nth", {"df": [{"a": 1, "b": 2}, {"a": 2, "b": 4}], "args": [1]}),
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("count", {"df": [{"a": 1, "b": 2}, {"a": 2, "b": 2}], "out_type": "int64"}),
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],
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)
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def test_groupby_non_arithmetic_agg_types(dtype, method, data):
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# GH9311, GH6620
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df = pd.DataFrame(
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[{"a": 1, "b": 1}, {"a": 1, "b": 2}, {"a": 2, "b": 3}, {"a": 2, "b": 4}]
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)
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df["b"] = df.b.astype(dtype)
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if "args" not in data:
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data["args"] = []
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if "out_type" in data:
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out_type = data["out_type"]
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else:
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out_type = dtype
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exp = data["df"]
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df_out = pd.DataFrame(exp)
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df_out["b"] = df_out.b.astype(out_type)
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df_out.set_index("a", inplace=True)
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grpd = df.groupby("a")
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t = getattr(grpd, method)(*data["args"])
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tm.assert_frame_equal(t, df_out)
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@pytest.mark.parametrize(
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"i",
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[
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(
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Timestamp("2011-01-15 12:50:28.502376"),
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Timestamp("2011-01-20 12:50:28.593448"),
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),
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(24650000000000001, 24650000000000002),
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],
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)
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def test_groupby_non_arithmetic_agg_int_like_precision(i):
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# see gh-6620, gh-9311
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df = pd.DataFrame([{"a": 1, "b": i[0]}, {"a": 1, "b": i[1]}])
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grp_exp = {
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"first": {"expected": i[0]},
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"last": {"expected": i[1]},
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"min": {"expected": i[0]},
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"max": {"expected": i[1]},
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"nth": {"expected": i[1], "args": [1]},
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"count": {"expected": 2},
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}
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for method, data in grp_exp.items():
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if "args" not in data:
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data["args"] = []
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grouped = df.groupby("a")
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res = getattr(grouped, method)(*data["args"])
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assert res.iloc[0].b == data["expected"]
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@pytest.mark.parametrize(
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"func, values",
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[
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("idxmin", {"c_int": [0, 2], "c_float": [1, 3], "c_date": [1, 2]}),
|
|
("idxmax", {"c_int": [1, 3], "c_float": [0, 2], "c_date": [0, 3]}),
|
|
],
|
|
)
|
|
def test_idxmin_idxmax_returns_int_types(func, values):
|
|
# GH 25444
|
|
df = pd.DataFrame(
|
|
{
|
|
"name": ["A", "A", "B", "B"],
|
|
"c_int": [1, 2, 3, 4],
|
|
"c_float": [4.02, 3.03, 2.04, 1.05],
|
|
"c_date": ["2019", "2018", "2016", "2017"],
|
|
}
|
|
)
|
|
df["c_date"] = pd.to_datetime(df["c_date"])
|
|
|
|
result = getattr(df.groupby("name"), func)()
|
|
|
|
expected = pd.DataFrame(values, index=Index(["A", "B"], name="name"))
|
|
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
|
|
def test_fill_consistency():
|
|
|
|
# GH9221
|
|
# pass thru keyword arguments to the generated wrapper
|
|
# are set if the passed kw is None (only)
|
|
df = DataFrame(
|
|
index=pd.MultiIndex.from_product(
|
|
[["value1", "value2"], date_range("2014-01-01", "2014-01-06")]
|
|
),
|
|
columns=Index(["1", "2"], name="id"),
|
|
)
|
|
df["1"] = [
|
|
np.nan,
|
|
1,
|
|
np.nan,
|
|
np.nan,
|
|
11,
|
|
np.nan,
|
|
np.nan,
|
|
2,
|
|
np.nan,
|
|
np.nan,
|
|
22,
|
|
np.nan,
|
|
]
|
|
df["2"] = [
|
|
np.nan,
|
|
3,
|
|
np.nan,
|
|
np.nan,
|
|
33,
|
|
np.nan,
|
|
np.nan,
|
|
4,
|
|
np.nan,
|
|
np.nan,
|
|
44,
|
|
np.nan,
|
|
]
|
|
|
|
expected = df.groupby(level=0, axis=0).fillna(method="ffill")
|
|
result = df.T.groupby(level=0, axis=1).fillna(method="ffill").T
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
|
|
def test_groupby_cumprod():
|
|
# GH 4095
|
|
df = pd.DataFrame({"key": ["b"] * 10, "value": 2})
|
|
|
|
actual = df.groupby("key")["value"].cumprod()
|
|
expected = df.groupby("key")["value"].apply(lambda x: x.cumprod())
|
|
expected.name = "value"
|
|
tm.assert_series_equal(actual, expected)
|
|
|
|
df = pd.DataFrame({"key": ["b"] * 100, "value": 2})
|
|
actual = df.groupby("key")["value"].cumprod()
|
|
# if overflows, groupby product casts to float
|
|
# while numpy passes back invalid values
|
|
df["value"] = df["value"].astype(float)
|
|
expected = df.groupby("key")["value"].apply(lambda x: x.cumprod())
|
|
expected.name = "value"
|
|
tm.assert_series_equal(actual, expected)
|
|
|
|
|
|
def scipy_sem(*args, **kwargs):
|
|
from scipy.stats import sem
|
|
|
|
return sem(*args, ddof=1, **kwargs)
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"op,targop",
|
|
[
|
|
("mean", np.mean),
|
|
("median", np.median),
|
|
("std", np.std),
|
|
("var", np.var),
|
|
("sum", np.sum),
|
|
("prod", np.prod),
|
|
("min", np.min),
|
|
("max", np.max),
|
|
("first", lambda x: x.iloc[0]),
|
|
("last", lambda x: x.iloc[-1]),
|
|
("count", np.size),
|
|
pytest.param("sem", scipy_sem, marks=td.skip_if_no_scipy),
|
|
],
|
|
)
|
|
def test_ops_general(op, targop):
|
|
df = DataFrame(np.random.randn(1000))
|
|
labels = np.random.randint(0, 50, size=1000).astype(float)
|
|
|
|
result = getattr(df.groupby(labels), op)().astype(float)
|
|
expected = df.groupby(labels).agg(targop)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
|
|
def test_max_nan_bug():
|
|
raw = """,Date,app,File
|
|
-04-23,2013-04-23 00:00:00,,log080001.log
|
|
-05-06,2013-05-06 00:00:00,,log.log
|
|
-05-07,2013-05-07 00:00:00,OE,xlsx"""
|
|
|
|
df = pd.read_csv(StringIO(raw), parse_dates=[0])
|
|
gb = df.groupby("Date")
|
|
r = gb[["File"]].max()
|
|
e = gb["File"].max().to_frame()
|
|
tm.assert_frame_equal(r, e)
|
|
assert not r["File"].isna().any()
|
|
|
|
|
|
def test_nlargest():
|
|
a = Series([1, 3, 5, 7, 2, 9, 0, 4, 6, 10])
|
|
b = Series(list("a" * 5 + "b" * 5))
|
|
gb = a.groupby(b)
|
|
r = gb.nlargest(3)
|
|
e = Series(
|
|
[7, 5, 3, 10, 9, 6],
|
|
index=MultiIndex.from_arrays([list("aaabbb"), [3, 2, 1, 9, 5, 8]]),
|
|
)
|
|
tm.assert_series_equal(r, e)
|
|
|
|
a = Series([1, 1, 3, 2, 0, 3, 3, 2, 1, 0])
|
|
gb = a.groupby(b)
|
|
e = Series(
|
|
[3, 2, 1, 3, 3, 2],
|
|
index=MultiIndex.from_arrays([list("aaabbb"), [2, 3, 1, 6, 5, 7]]),
|
|
)
|
|
tm.assert_series_equal(gb.nlargest(3, keep="last"), e)
|
|
|
|
|
|
def test_nlargest_mi_grouper():
|
|
# see gh-21411
|
|
npr = np.random.RandomState(123456789)
|
|
|
|
dts = date_range("20180101", periods=10)
|
|
iterables = [dts, ["one", "two"]]
|
|
|
|
idx = MultiIndex.from_product(iterables, names=["first", "second"])
|
|
s = Series(npr.randn(20), index=idx)
|
|
|
|
result = s.groupby("first").nlargest(1)
|
|
|
|
exp_idx = MultiIndex.from_tuples(
|
|
[
|
|
(dts[0], dts[0], "one"),
|
|
(dts[1], dts[1], "one"),
|
|
(dts[2], dts[2], "one"),
|
|
(dts[3], dts[3], "two"),
|
|
(dts[4], dts[4], "one"),
|
|
(dts[5], dts[5], "one"),
|
|
(dts[6], dts[6], "one"),
|
|
(dts[7], dts[7], "one"),
|
|
(dts[8], dts[8], "two"),
|
|
(dts[9], dts[9], "one"),
|
|
],
|
|
names=["first", "first", "second"],
|
|
)
|
|
|
|
exp_values = [
|
|
2.2129019979039612,
|
|
1.8417114045748335,
|
|
0.858963679564603,
|
|
1.3759151378258088,
|
|
0.9430284594687134,
|
|
0.5296914208183142,
|
|
0.8318045593815487,
|
|
-0.8476703342910327,
|
|
0.3804446884133735,
|
|
-0.8028845810770998,
|
|
]
|
|
|
|
expected = Series(exp_values, index=exp_idx)
|
|
tm.assert_series_equal(result, expected, check_exact=False, rtol=1e-3)
|
|
|
|
|
|
def test_nsmallest():
|
|
a = Series([1, 3, 5, 7, 2, 9, 0, 4, 6, 10])
|
|
b = Series(list("a" * 5 + "b" * 5))
|
|
gb = a.groupby(b)
|
|
r = gb.nsmallest(3)
|
|
e = Series(
|
|
[1, 2, 3, 0, 4, 6],
|
|
index=MultiIndex.from_arrays([list("aaabbb"), [0, 4, 1, 6, 7, 8]]),
|
|
)
|
|
tm.assert_series_equal(r, e)
|
|
|
|
a = Series([1, 1, 3, 2, 0, 3, 3, 2, 1, 0])
|
|
gb = a.groupby(b)
|
|
e = Series(
|
|
[0, 1, 1, 0, 1, 2],
|
|
index=MultiIndex.from_arrays([list("aaabbb"), [4, 1, 0, 9, 8, 7]]),
|
|
)
|
|
tm.assert_series_equal(gb.nsmallest(3, keep="last"), e)
|
|
|
|
|
|
@pytest.mark.parametrize("func", ["cumprod", "cumsum"])
|
|
def test_numpy_compat(func):
|
|
# see gh-12811
|
|
df = pd.DataFrame({"A": [1, 2, 1], "B": [1, 2, 3]})
|
|
g = df.groupby("A")
|
|
|
|
msg = "numpy operations are not valid with groupby"
|
|
|
|
with pytest.raises(UnsupportedFunctionCall, match=msg):
|
|
getattr(g, func)(1, 2, 3)
|
|
with pytest.raises(UnsupportedFunctionCall, match=msg):
|
|
getattr(g, func)(foo=1)
|
|
|
|
|
|
def test_cummin(numpy_dtypes_for_minmax):
|
|
dtype = numpy_dtypes_for_minmax[0]
|
|
min_val = numpy_dtypes_for_minmax[1]
|
|
|
|
# GH 15048
|
|
base_df = pd.DataFrame(
|
|
{"A": [1, 1, 1, 1, 2, 2, 2, 2], "B": [3, 4, 3, 2, 2, 3, 2, 1]}
|
|
)
|
|
expected_mins = [3, 3, 3, 2, 2, 2, 2, 1]
|
|
|
|
df = base_df.astype(dtype)
|
|
|
|
expected = pd.DataFrame({"B": expected_mins}).astype(dtype)
|
|
result = df.groupby("A").cummin()
|
|
tm.assert_frame_equal(result, expected)
|
|
result = df.groupby("A").B.apply(lambda x: x.cummin()).to_frame()
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# Test w/ min value for dtype
|
|
df.loc[[2, 6], "B"] = min_val
|
|
expected.loc[[2, 3, 6, 7], "B"] = min_val
|
|
result = df.groupby("A").cummin()
|
|
tm.assert_frame_equal(result, expected)
|
|
expected = df.groupby("A").B.apply(lambda x: x.cummin()).to_frame()
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# Test nan in some values
|
|
base_df.loc[[0, 2, 4, 6], "B"] = np.nan
|
|
expected = pd.DataFrame({"B": [np.nan, 4, np.nan, 2, np.nan, 3, np.nan, 1]})
|
|
result = base_df.groupby("A").cummin()
|
|
tm.assert_frame_equal(result, expected)
|
|
expected = base_df.groupby("A").B.apply(lambda x: x.cummin()).to_frame()
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# GH 15561
|
|
df = pd.DataFrame(dict(a=[1], b=pd.to_datetime(["2001"])))
|
|
expected = pd.Series(pd.to_datetime("2001"), index=[0], name="b")
|
|
|
|
result = df.groupby("a")["b"].cummin()
|
|
tm.assert_series_equal(expected, result)
|
|
|
|
# GH 15635
|
|
df = pd.DataFrame(dict(a=[1, 2, 1], b=[1, 2, 2]))
|
|
result = df.groupby("a").b.cummin()
|
|
expected = pd.Series([1, 2, 1], name="b")
|
|
tm.assert_series_equal(result, expected)
|
|
|
|
|
|
def test_cummin_all_nan_column():
|
|
base_df = pd.DataFrame({"A": [1, 1, 1, 1, 2, 2, 2, 2], "B": [np.nan] * 8})
|
|
|
|
expected = pd.DataFrame({"B": [np.nan] * 8})
|
|
result = base_df.groupby("A").cummin()
|
|
tm.assert_frame_equal(expected, result)
|
|
result = base_df.groupby("A").B.apply(lambda x: x.cummin()).to_frame()
|
|
tm.assert_frame_equal(expected, result)
|
|
|
|
|
|
def test_cummax(numpy_dtypes_for_minmax):
|
|
dtype = numpy_dtypes_for_minmax[0]
|
|
max_val = numpy_dtypes_for_minmax[2]
|
|
|
|
# GH 15048
|
|
base_df = pd.DataFrame(
|
|
{"A": [1, 1, 1, 1, 2, 2, 2, 2], "B": [3, 4, 3, 2, 2, 3, 2, 1]}
|
|
)
|
|
expected_maxs = [3, 4, 4, 4, 2, 3, 3, 3]
|
|
|
|
df = base_df.astype(dtype)
|
|
|
|
expected = pd.DataFrame({"B": expected_maxs}).astype(dtype)
|
|
result = df.groupby("A").cummax()
|
|
tm.assert_frame_equal(result, expected)
|
|
result = df.groupby("A").B.apply(lambda x: x.cummax()).to_frame()
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# Test w/ max value for dtype
|
|
df.loc[[2, 6], "B"] = max_val
|
|
expected.loc[[2, 3, 6, 7], "B"] = max_val
|
|
result = df.groupby("A").cummax()
|
|
tm.assert_frame_equal(result, expected)
|
|
expected = df.groupby("A").B.apply(lambda x: x.cummax()).to_frame()
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# Test nan in some values
|
|
base_df.loc[[0, 2, 4, 6], "B"] = np.nan
|
|
expected = pd.DataFrame({"B": [np.nan, 4, np.nan, 4, np.nan, 3, np.nan, 3]})
|
|
result = base_df.groupby("A").cummax()
|
|
tm.assert_frame_equal(result, expected)
|
|
expected = base_df.groupby("A").B.apply(lambda x: x.cummax()).to_frame()
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# GH 15561
|
|
df = pd.DataFrame(dict(a=[1], b=pd.to_datetime(["2001"])))
|
|
expected = pd.Series(pd.to_datetime("2001"), index=[0], name="b")
|
|
|
|
result = df.groupby("a")["b"].cummax()
|
|
tm.assert_series_equal(expected, result)
|
|
|
|
# GH 15635
|
|
df = pd.DataFrame(dict(a=[1, 2, 1], b=[2, 1, 1]))
|
|
result = df.groupby("a").b.cummax()
|
|
expected = pd.Series([2, 1, 2], name="b")
|
|
tm.assert_series_equal(result, expected)
|
|
|
|
|
|
def test_cummax_all_nan_column():
|
|
base_df = pd.DataFrame({"A": [1, 1, 1, 1, 2, 2, 2, 2], "B": [np.nan] * 8})
|
|
|
|
expected = pd.DataFrame({"B": [np.nan] * 8})
|
|
result = base_df.groupby("A").cummax()
|
|
tm.assert_frame_equal(expected, result)
|
|
result = base_df.groupby("A").B.apply(lambda x: x.cummax()).to_frame()
|
|
tm.assert_frame_equal(expected, result)
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"in_vals, out_vals",
|
|
[
|
|
# Basics: strictly increasing (T), strictly decreasing (F),
|
|
# abs val increasing (F), non-strictly increasing (T)
|
|
([1, 2, 5, 3, 2, 0, 4, 5, -6, 1, 1], [True, False, False, True]),
|
|
# Test with inf vals
|
|
(
|
|
[1, 2.1, np.inf, 3, 2, np.inf, -np.inf, 5, 11, 1, -np.inf],
|
|
[True, False, True, False],
|
|
),
|
|
# Test with nan vals; should always be False
|
|
(
|
|
[1, 2, np.nan, 3, 2, np.nan, np.nan, 5, -np.inf, 1, np.nan],
|
|
[False, False, False, False],
|
|
),
|
|
],
|
|
)
|
|
def test_is_monotonic_increasing(in_vals, out_vals):
|
|
# GH 17015
|
|
source_dict = {
|
|
"A": ["1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11"],
|
|
"B": ["a", "a", "a", "b", "b", "b", "c", "c", "c", "d", "d"],
|
|
"C": in_vals,
|
|
}
|
|
df = pd.DataFrame(source_dict)
|
|
result = df.groupby("B").C.is_monotonic_increasing
|
|
index = Index(list("abcd"), name="B")
|
|
expected = pd.Series(index=index, data=out_vals, name="C")
|
|
tm.assert_series_equal(result, expected)
|
|
|
|
# Also check result equal to manually taking x.is_monotonic_increasing.
|
|
expected = df.groupby(["B"]).C.apply(lambda x: x.is_monotonic_increasing)
|
|
tm.assert_series_equal(result, expected)
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"in_vals, out_vals",
|
|
[
|
|
# Basics: strictly decreasing (T), strictly increasing (F),
|
|
# abs val decreasing (F), non-strictly increasing (T)
|
|
([10, 9, 7, 3, 4, 5, -3, 2, 0, 1, 1], [True, False, False, True]),
|
|
# Test with inf vals
|
|
(
|
|
[np.inf, 1, -np.inf, np.inf, 2, -3, -np.inf, 5, -3, -np.inf, -np.inf],
|
|
[True, True, False, True],
|
|
),
|
|
# Test with nan vals; should always be False
|
|
(
|
|
[1, 2, np.nan, 3, 2, np.nan, np.nan, 5, -np.inf, 1, np.nan],
|
|
[False, False, False, False],
|
|
),
|
|
],
|
|
)
|
|
def test_is_monotonic_decreasing(in_vals, out_vals):
|
|
# GH 17015
|
|
source_dict = {
|
|
"A": ["1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11"],
|
|
"B": ["a", "a", "a", "b", "b", "b", "c", "c", "c", "d", "d"],
|
|
"C": in_vals,
|
|
}
|
|
|
|
df = pd.DataFrame(source_dict)
|
|
result = df.groupby("B").C.is_monotonic_decreasing
|
|
index = Index(list("abcd"), name="B")
|
|
expected = pd.Series(index=index, data=out_vals, name="C")
|
|
tm.assert_series_equal(result, expected)
|
|
|
|
|
|
# describe
|
|
# --------------------------------
|
|
|
|
|
|
def test_apply_describe_bug(mframe):
|
|
grouped = mframe.groupby(level="first")
|
|
grouped.describe() # it works!
|
|
|
|
|
|
def test_series_describe_multikey():
|
|
ts = tm.makeTimeSeries()
|
|
grouped = ts.groupby([lambda x: x.year, lambda x: x.month])
|
|
result = grouped.describe()
|
|
tm.assert_series_equal(result["mean"], grouped.mean(), check_names=False)
|
|
tm.assert_series_equal(result["std"], grouped.std(), check_names=False)
|
|
tm.assert_series_equal(result["min"], grouped.min(), check_names=False)
|
|
|
|
|
|
def test_series_describe_single():
|
|
ts = tm.makeTimeSeries()
|
|
grouped = ts.groupby(lambda x: x.month)
|
|
result = grouped.apply(lambda x: x.describe())
|
|
expected = grouped.describe().stack()
|
|
tm.assert_series_equal(result, expected)
|
|
|
|
|
|
def test_series_index_name(df):
|
|
grouped = df.loc[:, ["C"]].groupby(df["A"])
|
|
result = grouped.agg(lambda x: x.mean())
|
|
assert result.index.name == "A"
|
|
|
|
|
|
def test_frame_describe_multikey(tsframe):
|
|
grouped = tsframe.groupby([lambda x: x.year, lambda x: x.month])
|
|
result = grouped.describe()
|
|
desc_groups = []
|
|
for col in tsframe:
|
|
group = grouped[col].describe()
|
|
# GH 17464 - Remove duplicate MultiIndex levels
|
|
group_col = pd.MultiIndex(
|
|
levels=[[col], group.columns],
|
|
codes=[[0] * len(group.columns), range(len(group.columns))],
|
|
)
|
|
group = pd.DataFrame(group.values, columns=group_col, index=group.index)
|
|
desc_groups.append(group)
|
|
expected = pd.concat(desc_groups, axis=1)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
groupedT = tsframe.groupby({"A": 0, "B": 0, "C": 1, "D": 1}, axis=1)
|
|
result = groupedT.describe()
|
|
expected = tsframe.describe().T
|
|
expected.index = pd.MultiIndex(
|
|
levels=[[0, 1], expected.index],
|
|
codes=[[0, 0, 1, 1], range(len(expected.index))],
|
|
)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
|
|
def test_frame_describe_tupleindex():
|
|
|
|
# GH 14848 - regression from 0.19.0 to 0.19.1
|
|
df1 = DataFrame(
|
|
{
|
|
"x": [1, 2, 3, 4, 5] * 3,
|
|
"y": [10, 20, 30, 40, 50] * 3,
|
|
"z": [100, 200, 300, 400, 500] * 3,
|
|
}
|
|
)
|
|
df1["k"] = [(0, 0, 1), (0, 1, 0), (1, 0, 0)] * 5
|
|
df2 = df1.rename(columns={"k": "key"})
|
|
msg = "Names should be list-like for a MultiIndex"
|
|
with pytest.raises(ValueError, match=msg):
|
|
df1.groupby("k").describe()
|
|
with pytest.raises(ValueError, match=msg):
|
|
df2.groupby("key").describe()
|
|
|
|
|
|
def test_frame_describe_unstacked_format():
|
|
# GH 4792
|
|
prices = {
|
|
pd.Timestamp("2011-01-06 10:59:05", tz=None): 24990,
|
|
pd.Timestamp("2011-01-06 12:43:33", tz=None): 25499,
|
|
pd.Timestamp("2011-01-06 12:54:09", tz=None): 25499,
|
|
}
|
|
volumes = {
|
|
pd.Timestamp("2011-01-06 10:59:05", tz=None): 1500000000,
|
|
pd.Timestamp("2011-01-06 12:43:33", tz=None): 5000000000,
|
|
pd.Timestamp("2011-01-06 12:54:09", tz=None): 100000000,
|
|
}
|
|
df = pd.DataFrame({"PRICE": prices, "VOLUME": volumes})
|
|
result = df.groupby("PRICE").VOLUME.describe()
|
|
data = [
|
|
df[df.PRICE == 24990].VOLUME.describe().values.tolist(),
|
|
df[df.PRICE == 25499].VOLUME.describe().values.tolist(),
|
|
]
|
|
expected = pd.DataFrame(
|
|
data,
|
|
index=pd.Index([24990, 25499], name="PRICE"),
|
|
columns=["count", "mean", "std", "min", "25%", "50%", "75%", "max"],
|
|
)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
|
|
def test_groupby_mean_no_overflow():
|
|
# Regression test for (#22487)
|
|
df = pd.DataFrame(
|
|
{
|
|
"user": ["A", "A", "A", "A", "A"],
|
|
"connections": [4970, 4749, 4719, 4704, 18446744073699999744],
|
|
}
|
|
)
|
|
assert df.groupby("user")["connections"].mean()["A"] == 3689348814740003840
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"values",
|
|
[
|
|
{
|
|
"a": [1, 1, 1, 2, 2, 2, 3, 3, 3],
|
|
"b": [1, pd.NA, 2, 1, pd.NA, 2, 1, pd.NA, 2],
|
|
},
|
|
{"a": [1, 1, 2, 2, 3, 3], "b": [1, 2, 1, 2, 1, 2]},
|
|
],
|
|
)
|
|
@pytest.mark.parametrize("function", ["mean", "median", "var"])
|
|
def test_apply_to_nullable_integer_returns_float(values, function):
|
|
# https://github.com/pandas-dev/pandas/issues/32219
|
|
output = 0.5 if function == "var" else 1.5
|
|
arr = np.array([output] * 3, dtype=float)
|
|
idx = pd.Index([1, 2, 3], dtype=object, name="a")
|
|
expected = pd.DataFrame({"b": arr}, index=idx)
|
|
|
|
groups = pd.DataFrame(values, dtype="Int64").groupby("a")
|
|
|
|
result = getattr(groups, function)()
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
result = groups.agg(function)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
result = groups.agg([function])
|
|
expected.columns = MultiIndex.from_tuples([("b", function)])
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
|
|
def test_groupby_sum_below_mincount_nullable_integer():
|
|
# https://github.com/pandas-dev/pandas/issues/32861
|
|
df = pd.DataFrame({"a": [0, 1, 2], "b": [0, 1, 2], "c": [0, 1, 2]}, dtype="Int64")
|
|
grouped = df.groupby("a")
|
|
idx = pd.Index([0, 1, 2], dtype=object, name="a")
|
|
|
|
result = grouped["b"].sum(min_count=2)
|
|
expected = pd.Series([pd.NA] * 3, dtype="Int64", index=idx, name="b")
|
|
tm.assert_series_equal(result, expected)
|
|
|
|
result = grouped.sum(min_count=2)
|
|
expected = pd.DataFrame(
|
|
{"b": [pd.NA] * 3, "c": [pd.NA] * 3}, dtype="Int64", index=idx
|
|
)
|
|
tm.assert_frame_equal(result, expected)
|