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python/pyspark/pandas/tests/computation/test_compute.py
581 строка
22 KB
Devin Petersohn
[SPARK-46161][PS] Add axis=1 support for DataFrame.diff
12 авг 2026, 21:50
12 авг 2026, 21:50
a9689fb
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# # Licensed to the Apache Software Foundation (ASF) under one or more # contributor license agreements. See the NOTICE file distributed with # this work for additional information regarding copyright ownership. # The ASF licenses this file to You under the Apache License, Version 2.0 # (the "License"); you may not use this file except in compliance with # the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. # import numpy as np import pandas as pd from pyspark.sql import functions as sf from pyspark import pandas as ps from pyspark.testing.pandasutils import PandasOnSparkTestCase # This file contains test cases for 'Computations / Descriptive Stats' # https://spark.apache.org/docs/latest/api/python/reference/pyspark.pandas/frame.html#computations-descriptive-stats class FrameComputeMixin: @property def pdf(self): return pd.DataFrame( {"a": [1, 2, 3, 4, 5, 6, 7, 8, 9], "b": [4, 5, 6, 3, 2, 1, 0, 0, 0]}, index=np.random.rand(9), ) @property def df_pair(self): pdf = self.pdf psdf = ps.from_pandas(pdf) return pdf, psdf def test_abs(self): pdf = pd.DataFrame({"a": [-2, -1, 0, 1]}) psdf = ps.from_pandas(pdf) self.assert_eq(abs(psdf), abs(pdf)) self.assert_eq(np.abs(psdf), np.abs(pdf)) def test_clip(self): pdf = pd.DataFrame( {"A": [0, 2, 4], "B": [4, 2, 0], "X": [-1, 10, 0]}, index=np.random.rand(3) ) psdf = ps.from_pandas(pdf) # Assert list-like values are not accepted for 'lower' and 'upper' msg = "List-like value are not supported for 'lower' and 'upper' at the moment" with self.assertRaises(TypeError, msg=msg): psdf.clip(lower=[1]) with self.assertRaises(TypeError, msg=msg): psdf.clip(upper=[1]) # Assert no lower or upper self.assert_eq(psdf.clip(), pdf.clip()) # Assert lower only self.assert_eq(psdf.clip(1), pdf.clip(1)) # Assert upper only self.assert_eq(psdf.clip(upper=3), pdf.clip(upper=3)) # Assert lower and upper self.assert_eq(psdf.clip(1, 3), pdf.clip(1, 3)) pdf["clip"] = pdf.A.clip(lower=1, upper=3) psdf["clip"] = psdf.A.clip(lower=1, upper=3) self.assert_eq(psdf, pdf) # Assert behavior on string values str_psdf = ps.DataFrame({"A": ["a", "b", "c"]}, index=np.random.rand(3)) self.assert_eq(str_psdf.clip(1, 3), str_psdf) def test_mode(self): pdf = pd.DataFrame( { "A": [1, 2, None, 4, 5, 4, 2], "B": [-0.1, 0.2, -0.3, np.nan, 0.5, -0.1, -0.1], "C": ["d", "b", "c", "c", "e", "a", "a"], "D": [np.nan, np.nan, np.nan, np.nan, 0.1, -0.1, -0.1], "E": [np.nan, np.nan, np.nan, np.nan, np.nan, np.nan, np.nan], } ) psdf = ps.from_pandas(pdf) self.assert_eq(psdf.mode(), pdf.mode()) self.assert_eq(psdf.mode(numeric_only=True), pdf.mode(numeric_only=True)) self.assert_eq(psdf.mode(dropna=False), pdf.mode(dropna=False)) # dataframe with single column for c in ["A", "B", "C", "D", "E"]: self.assert_eq(psdf[[c]].mode(), pdf[[c]].mode()) with self.assertRaises(ValueError): psdf.mode(axis=2) def func(iterator): for pdf in iterator: if len(pdf) > 0: if pdf["partition"][0] == 3: yield pd.DataFrame( { "num": [ "3", "3", "3", "3", "4", ] } ) else: yield pd.DataFrame( { "num": [ "0", "1", "2", "3", "4", ] } ) df = ( self.spark.range(0, 4, 1, 4) .select(sf.spark_partition_id().alias("partition")) .mapInPandas(func, "num string") ) psdf = df.pandas_api() self.assert_eq(psdf.mode(), psdf._to_pandas().mode()) def test_round(self): pdf = pd.DataFrame( { "A": [0.028208, 0.038683, 0.877076], "B": [0.992815, 0.645646, 0.149370], "C": [0.173891, 0.577595, 0.491027], }, columns=["A", "B", "C"], index=np.random.rand(3), ) psdf = ps.from_pandas(pdf) pser = pd.Series([1, 0, 2], index=["A", "B", "C"]) psser = ps.Series([1, 0, 2], index=["A", "B", "C"]) self.assert_eq(pdf.round(2), psdf.round(2)) self.assert_eq(pdf.round({"A": 1, "C": 2}), psdf.round({"A": 1, "C": 2})) self.assert_eq(pdf.round({"A": 1, "D": 2}), psdf.round({"A": 1, "D": 2})) self.assert_eq(pdf.round(pser), psdf.round(psser)) msg = "decimals must be an integer, a dict-like or a Series" with self.assertRaisesRegex(TypeError, msg): psdf.round(1.5) # multi-index columns columns = pd.MultiIndex.from_tuples([("X", "A"), ("X", "B"), ("Y", "C")]) pdf.columns = columns psdf.columns = columns pser = pd.Series([1, 0, 2], index=columns) psser = ps.Series([1, 0, 2], index=columns) self.assert_eq(pdf.round(2), psdf.round(2)) self.assert_eq( pdf.round({("X", "A"): 1, ("Y", "C"): 2}), psdf.round({("X", "A"): 1, ("Y", "C"): 2}) ) self.assert_eq(pdf.round({("X", "A"): 1, "Y": 2}), psdf.round({("X", "A"): 1, "Y": 2})) self.assert_eq(pdf.round(pser), psdf.round(psser)) # non-string names pdf = pd.DataFrame( { 10: [0.028208, 0.038683, 0.877076], 20: [0.992815, 0.645646, 0.149370], 30: [0.173891, 0.577595, 0.491027], }, index=np.random.rand(3), ) psdf = ps.from_pandas(pdf) self.assert_eq(pdf.round({10: 1, 30: 2}), psdf.round({10: 1, 30: 2})) def test_diff(self): pdf = pd.DataFrame( {"a": [1, 2, 3, 4, 5, 6], "b": [1, 1, 2, 3, 5, 8], "c": [1, 4, 9, 16, 25, 36]}, index=np.random.rand(6), ) psdf = ps.from_pandas(pdf) self.assert_eq(pdf.diff(), psdf.diff()) self.assert_eq(pdf.diff().diff(-1), psdf.diff().diff(-1)) self.assert_eq(pdf.diff().sum().astype(int), psdf.diff().sum()) msg = "should be an int" with self.assertRaisesRegex(TypeError, msg): psdf.diff(1.5) # axis=1: difference across columns self.assert_eq(pdf.diff(axis=1), psdf.diff(axis=1)) self.assert_eq(pdf.diff(periods=2, axis=1), psdf.diff(periods=2, axis=1)) self.assert_eq(pdf.diff(periods=-1, axis=1), psdf.diff(periods=-1, axis=1)) # multi-index columns columns = pd.MultiIndex.from_tuples([("x", "Col1"), ("x", "Col2"), ("y", "Col3")]) pdf.columns = columns psdf.columns = columns self.assert_eq(pdf.diff(), psdf.diff()) def test_pct_change(self): pdf = pd.DataFrame( {"a": [1, 2, 3, 2], "b": [4.0, 2.0, 3.0, 1.0], "c": [300, 200, 400, 200]}, index=np.random.rand(4), ) pdf.columns = pd.MultiIndex.from_tuples([("a", "x"), ("b", "y"), ("c", "z")]) psdf = ps.from_pandas(pdf) self.assert_eq(psdf.pct_change(2), pdf.pct_change(2), check_exact=False) self.assert_eq(psdf.pct_change().sum(), pdf.pct_change().sum(), check_exact=False) def test_rank(self): pdf = pd.DataFrame( data={"col1": [1, 2, 3, 1], "col2": [3, 4, 3, 1]}, columns=["col1", "col2"], index=np.random.rand(4), ) psdf = ps.from_pandas(pdf) self.assert_eq(pdf.rank().sort_index(), psdf.rank().sort_index()) self.assert_eq(pdf.rank().sum(), psdf.rank().sum()) self.assert_eq( pdf.rank(ascending=False).sort_index(), psdf.rank(ascending=False).sort_index() ) self.assert_eq(pdf.rank(method="min").sort_index(), psdf.rank(method="min").sort_index()) self.assert_eq(pdf.rank(method="max").sort_index(), psdf.rank(method="max").sort_index()) self.assert_eq( pdf.rank(method="first").sort_index(), psdf.rank(method="first").sort_index() ) self.assert_eq( pdf.rank(method="dense").sort_index(), psdf.rank(method="dense").sort_index() ) msg = "method must be one of 'average', 'min', 'max', 'first', 'dense'" with self.assertRaisesRegex(ValueError, msg): psdf.rank(method="nothing") # multi-index columns columns = pd.MultiIndex.from_tuples([("x", "col1"), ("y", "col2")]) pdf.columns = columns psdf.columns = columns self.assert_eq(pdf.rank().sort_index(), psdf.rank().sort_index()) # non-numeric columns pdf = pd.DataFrame( data={"col1": [1, 2, 3, 1], "col2": ["a", "b", "c", "d"]}, index=np.random.rand(4), ) psdf = ps.from_pandas(pdf) self.assert_eq( pdf.rank(numeric_only=True).sort_index(), psdf.rank(numeric_only=True).sort_index() ) self.assert_eq( pdf.rank(numeric_only=False).sort_index(), psdf.rank(numeric_only=False).sort_index() ) self.assert_eq( pdf.rank(numeric_only=None).sort_index(), psdf.rank(numeric_only=None).sort_index() ) self.assert_eq( pdf[["col2"]].rank(numeric_only=True), psdf[["col2"]].rank(numeric_only=True), ) def test_rank_axis(self): # Test basic axis parameter functionality pdf = pd.DataFrame({"A": [1, 2, 2, 3], "B": [4, 3, 2, 1], "C": [2, 2, 3, 2]}) psdf = ps.from_pandas(pdf) # Test axis=0 (explicit, should match default behavior) self.assert_eq(pdf.rank(axis=0).sort_index(), psdf.rank(axis=0).sort_index()) # Test axis=1 (rank across columns) self.assert_eq(pdf.rank(axis=1).sort_index(), psdf.rank(axis=1).sort_index()) # Test axis='index' and axis='columns' self.assert_eq(pdf.rank(axis="index").sort_index(), psdf.rank(axis="index").sort_index()) self.assert_eq( pdf.rank(axis="columns").sort_index(), psdf.rank(axis="columns").sort_index() ) # Test all ranking methods with axis=1 for method in ["average", "min", "max", "first", "dense"]: self.assert_eq( pdf.rank(method=method, axis=1).sort_index(), psdf.rank(method=method, axis=1).sort_index(), ) # Test ascending parameter with axis=1 self.assert_eq( pdf.rank(axis=1, ascending=True).sort_index(), psdf.rank(axis=1, ascending=True).sort_index(), ) self.assert_eq( pdf.rank(axis=1, ascending=False).sort_index(), psdf.rank(axis=1, ascending=False).sort_index(), ) # Test numeric_only with axis=1 pdf_mixed = pd.DataFrame({"A": [1, 2, 3, 4], "B": [4, 3, 2, 1], "C": ["w", "x", "y", "z"]}) psdf_mixed = ps.from_pandas(pdf_mixed) self.assert_eq( pdf_mixed.rank(axis=1, numeric_only=True).sort_index(), psdf_mixed.rank(axis=1, numeric_only=True).sort_index(), ) # Test with single column DataFrame pdf_single = pd.DataFrame({"A": [1, 2, 3, 4]}) psdf_single = ps.from_pandas(pdf_single) self.assert_eq( pdf_single.rank(axis=1).sort_index(), psdf_single.rank(axis=1).sort_index(), ) # Test with NaN values pdf_nan = pd.DataFrame({"A": [1, np.nan, 3], "B": [4, 3, np.nan]}) psdf_nan = ps.from_pandas(pdf_nan) self.assert_eq( pdf_nan.rank(axis=1).sort_index(), psdf_nan.rank(axis=1).sort_index(), ) # Test with all equal values in a row pdf_equal = pd.DataFrame({"A": [1, 1, 1], "B": [1, 1, 1], "C": [1, 1, 1]}) psdf_equal = ps.from_pandas(pdf_equal) self.assert_eq( pdf_equal.rank(axis=1).sort_index(), psdf_equal.rank(axis=1).sort_index(), ) # Test with multi-index columns columns = pd.MultiIndex.from_tuples([("x", "A"), ("x", "B"), ("y", "C")]) pdf.columns = columns psdf.columns = columns self.assert_eq(pdf.rank(axis=1).sort_index(), psdf.rank(axis=1).sort_index()) # Test with large dataset to ensure UDF path is used (>1000 rows) pdf_large = pd.DataFrame( {"A": np.random.rand(1500), "B": np.random.rand(1500), "C": np.random.rand(1500)} ) psdf_large = ps.from_pandas(pdf_large) self.assert_eq( pdf_large.rank(axis=1).sort_index(), psdf_large.rank(axis=1).sort_index(), ) # Test invalid axis value with self.assertRaisesRegex(ValueError, "No axis named"): psdf.rank(axis=2) def test_nunique(self): pdf = pd.DataFrame({"A": [1, 2, 3], "B": [np.nan, 3, np.nan]}, index=np.random.rand(3)) psdf = ps.from_pandas(pdf) # Assert NaNs are dropped by default self.assert_eq(psdf.nunique(), pdf.nunique()) # Assert including NaN values self.assert_eq(psdf.nunique(dropna=False), pdf.nunique(dropna=False)) # Assert approximate counts self.assert_eq( ps.DataFrame({"A": range(100)}).nunique(approx=True), pd.Series([103], index=["A"]), ) self.assert_eq( ps.DataFrame({"A": range(100)}).nunique(approx=True, rsd=0.01), pd.Series([100], index=["A"]), ) # Test axis=1 (row-wise unique count) # Note: Compare values only - Spark's F.size returns int32, pandas returns int64 self.assertEqual(psdf.nunique(axis=1).tolist(), pdf.nunique(axis=1).tolist()) self.assertEqual( psdf.nunique(axis=1, dropna=False).tolist(), pdf.nunique(axis=1, dropna=False).tolist() ) # Test axis=1 with more complex data pdf2 = pd.DataFrame({"A": [1, 2, 3], "B": [1, 3, 3], "C": [2, 2, 3]}) psdf2 = ps.from_pandas(pdf2) self.assertEqual(psdf2.nunique(axis=1).tolist(), pdf2.nunique(axis=1).tolist()) # Test axis=1 with all NaN row pdf3 = pd.DataFrame({"A": [1, 2, np.nan], "B": [1, 3, np.nan], "C": [2, 2, np.nan]}) psdf3 = ps.from_pandas(pdf3) self.assertEqual( psdf3.nunique(axis=1, dropna=True).tolist(), pdf3.nunique(axis=1, dropna=True).tolist() ) self.assertEqual( psdf3.nunique(axis=1, dropna=False).tolist(), pdf3.nunique(axis=1, dropna=False).tolist(), ) # Test single column DataFrame with axis=1 pdf4 = pd.DataFrame({"A": [1, 2, 3]}) psdf4 = ps.from_pandas(pdf4) self.assertEqual(psdf4.nunique(axis=1).tolist(), pdf4.nunique(axis=1).tolist()) # multi-index columns columns = pd.MultiIndex.from_tuples([("X", "A"), ("Y", "B")], names=["1", "2"]) pdf.columns = columns psdf.columns = columns self.assert_eq(psdf.nunique(), pdf.nunique()) self.assert_eq(psdf.nunique(dropna=False), pdf.nunique(dropna=False)) self.assertEqual(psdf.nunique(axis=1).tolist(), pdf.nunique(axis=1).tolist()) self.assertEqual( psdf.nunique(axis=1, dropna=False).tolist(), pdf.nunique(axis=1, dropna=False).tolist() ) def test_nunique_with_string_column_and_missing_values(self): pdf = pd.DataFrame({"A": ["x", None, "x"], "B": ["y", "z", None]}) psdf = ps.from_pandas(pdf) expected = pdf.nunique() expected_dropna_false = pdf.nunique(dropna=False) actual = psdf.nunique() actual_dropna_false = psdf.nunique(dropna=False) self.assert_eq(actual, expected) self.assert_eq(actual_dropna_false, expected_dropna_false) self.assertEqual(actual.index.dtype, expected.index.dtype) self.assertEqual(actual_dropna_false.index.dtype, expected_dropna_false.index.dtype) self.assertEqual(actual.to_pandas().index.dtype, expected.index.dtype) self.assertEqual( actual_dropna_false.to_pandas().index.dtype, expected_dropna_false.index.dtype ) def test_quantile(self): pdf, psdf = self.df_pair self.assert_eq(psdf.quantile(0.5), pdf.quantile(0.5)) self.assert_eq(psdf.quantile([0.25, 0.5, 0.75]), pdf.quantile([0.25, 0.5, 0.75])) self.assert_eq(psdf.loc[[]].quantile(0.5), pdf.loc[[]].quantile(0.5)) self.assert_eq( psdf.loc[[]].quantile([0.25, 0.5, 0.75]), pdf.loc[[]].quantile([0.25, 0.5, 0.75]) ) with self.assertRaisesRegex( NotImplementedError, 'axis should be either 0 or "index" currently.' ): psdf.quantile(0.5, axis=1) with self.assertRaisesRegex(TypeError, "accuracy must be an integer; however"): psdf.quantile(accuracy="a") with self.assertRaisesRegex(TypeError, "q must be a float or an array of floats;"): psdf.quantile(q="a") with self.assertRaisesRegex(TypeError, "q must be a float or an array of floats;"): psdf.quantile(q=["a"]) with self.assertRaisesRegex( ValueError, r"percentiles should all be in the interval \[0, 1\]" ): psdf.quantile(q=[1.1]) self.assert_eq( psdf.quantile(0.5, numeric_only=False), pdf.quantile(0.5, numeric_only=False) ) self.assert_eq( psdf.quantile([0.25, 0.5, 0.75], numeric_only=False), pdf.quantile([0.25, 0.5, 0.75], numeric_only=False), ) # multi-index column columns = pd.MultiIndex.from_tuples([("x", "a"), ("y", "b")]) pdf.columns = columns psdf.columns = columns self.assert_eq(psdf.quantile(0.5), pdf.quantile(0.5)) self.assert_eq(psdf.quantile([0.25, 0.5, 0.75]), pdf.quantile([0.25, 0.5, 0.75])) pdf = pd.DataFrame({"x": ["a", "b", "c"]}) psdf = ps.from_pandas(pdf) self.assert_eq(psdf.quantile(0.5, numeric_only=True), pdf.quantile(0.5, numeric_only=True)) self.assert_eq( psdf.quantile([0.25, 0.5, 0.75], numeric_only=True), pdf.quantile([0.25, 0.5, 0.75], numeric_only=True), ) with self.assertRaisesRegex( TypeError, r"Could not convert (object|str) \(string\) to numeric" ): psdf.quantile(0.5, numeric_only=False) with self.assertRaisesRegex( TypeError, r"Could not convert (object|str) \(string\) to numeric" ): psdf.quantile([0.25, 0.5, 0.75], numeric_only=False) def test_product(self): pdf = pd.DataFrame( {"A": [1, 2, 3, 4, 5], "B": [10, 20, 30, 40, 50], "C": ["a", "b", "c", "d", "e"]} ) psdf = ps.from_pandas(pdf) self.assert_eq(pdf.prod(numeric_only=True), psdf.prod().sort_index()) # Named columns pdf.columns.name = "Koalas" psdf = ps.from_pandas(pdf) self.assert_eq(pdf.prod(numeric_only=True), psdf.prod().sort_index()) # MultiIndex columns pdf.columns = pd.MultiIndex.from_tuples([("a", "x"), ("b", "y"), ("c", "z")]) psdf = ps.from_pandas(pdf) self.assert_eq(pdf.prod(numeric_only=True), psdf.prod().sort_index()) # Named MultiIndex columns pdf.columns.names = ["Hello", "Koalas"] psdf = ps.from_pandas(pdf) self.assert_eq(pdf.prod(numeric_only=True), psdf.prod().sort_index()) # No numeric columns pdf = pd.DataFrame({"key": ["a", "b", "c"], "val": ["x", "y", "z"]}) psdf = ps.from_pandas(pdf) self.assert_eq(pdf.prod(numeric_only=True), psdf.prod().sort_index()) # No numeric named columns pdf.columns.name = "Koalas" psdf = ps.from_pandas(pdf) self.assert_eq(pdf.prod(numeric_only=True), psdf.prod().sort_index(), almost=True) # No numeric MultiIndex columns pdf.columns = pd.MultiIndex.from_tuples([("a", "x"), ("b", "y")]) psdf = ps.from_pandas(pdf) self.assert_eq(pdf.prod(numeric_only=True), psdf.prod().sort_index(), almost=True) # No numeric named MultiIndex columns pdf.columns.names = ["Hello", "Koalas"] psdf = ps.from_pandas(pdf) self.assert_eq(pdf.prod(numeric_only=True), psdf.prod().sort_index(), almost=True) # All NaN columns pdf = pd.DataFrame( { "A": [np.nan, np.nan, np.nan, np.nan, np.nan], "B": [10, 20, 30, 40, 50], "C": ["a", "b", "c", "d", "e"], } ) psdf = ps.from_pandas(pdf) self.assert_eq(pdf.prod(numeric_only=True), psdf.prod().sort_index(), check_exact=False) # All NaN named columns pdf.columns.name = "Koalas" psdf = ps.from_pandas(pdf) self.assert_eq(pdf.prod(numeric_only=True), psdf.prod().sort_index(), check_exact=False) # All NaN MultiIndex columns pdf.columns = pd.MultiIndex.from_tuples([("a", "x"), ("b", "y"), ("c", "z")]) psdf = ps.from_pandas(pdf) self.assert_eq(pdf.prod(numeric_only=True), psdf.prod().sort_index(), check_exact=False) # All NaN named MultiIndex columns pdf.columns.names = ["Hello", "Koalas"] psdf = ps.from_pandas(pdf) self.assert_eq(pdf.prod(numeric_only=True), psdf.prod().sort_index(), check_exact=False) class FrameComputeTests( FrameComputeMixin, PandasOnSparkTestCase, ): pass if __name__ == "__main__": from pyspark.testing import main main()