Updated script that can be controled by Nodejs web app
This commit is contained in:
mac OS
1101
lib/python3.13/site-packages/pandas/tests/reshape/merge/test_join.py
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1101
lib/python3.13/site-packages/pandas/tests/reshape/merge/test_join.py
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@ -0,0 +1,111 @@
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import pytest
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from pandas import (
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DataFrame,
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Series,
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)
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import pandas._testing as tm
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from pandas.core.reshape.merge import (
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MergeError,
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merge,
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)
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@pytest.mark.parametrize(
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("input_col", "output_cols"), [("b", ["a", "b"]), ("a", ["a_x", "a_y"])]
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)
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def test_merge_cross(input_col, output_cols):
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# GH#5401
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left = DataFrame({"a": [1, 3]})
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right = DataFrame({input_col: [3, 4]})
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left_copy = left.copy()
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right_copy = right.copy()
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result = merge(left, right, how="cross")
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expected = DataFrame({output_cols[0]: [1, 1, 3, 3], output_cols[1]: [3, 4, 3, 4]})
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tm.assert_frame_equal(result, expected)
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tm.assert_frame_equal(left, left_copy)
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tm.assert_frame_equal(right, right_copy)
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@pytest.mark.parametrize(
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"kwargs",
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[
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{"left_index": True},
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{"right_index": True},
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{"on": "a"},
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{"left_on": "a"},
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{"right_on": "b"},
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],
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)
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def test_merge_cross_error_reporting(kwargs):
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# GH#5401
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left = DataFrame({"a": [1, 3]})
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right = DataFrame({"b": [3, 4]})
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msg = (
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"Can not pass on, right_on, left_on or set right_index=True or "
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"left_index=True"
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)
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with pytest.raises(MergeError, match=msg):
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merge(left, right, how="cross", **kwargs)
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def test_merge_cross_mixed_dtypes():
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# GH#5401
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left = DataFrame(["a", "b", "c"], columns=["A"])
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right = DataFrame(range(2), columns=["B"])
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result = merge(left, right, how="cross")
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expected = DataFrame({"A": ["a", "a", "b", "b", "c", "c"], "B": [0, 1, 0, 1, 0, 1]})
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tm.assert_frame_equal(result, expected)
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def test_merge_cross_more_than_one_column():
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# GH#5401
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left = DataFrame({"A": list("ab"), "B": [2, 1]})
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right = DataFrame({"C": range(2), "D": range(4, 6)})
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result = merge(left, right, how="cross")
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expected = DataFrame(
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{
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"A": ["a", "a", "b", "b"],
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"B": [2, 2, 1, 1],
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"C": [0, 1, 0, 1],
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"D": [4, 5, 4, 5],
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}
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)
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tm.assert_frame_equal(result, expected)
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def test_merge_cross_null_values(nulls_fixture):
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# GH#5401
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left = DataFrame({"a": [1, nulls_fixture]})
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right = DataFrame({"b": ["a", "b"], "c": [1.0, 2.0]})
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result = merge(left, right, how="cross")
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expected = DataFrame(
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{
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"a": [1, 1, nulls_fixture, nulls_fixture],
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"b": ["a", "b", "a", "b"],
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"c": [1.0, 2.0, 1.0, 2.0],
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}
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)
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tm.assert_frame_equal(result, expected)
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def test_join_cross_error_reporting():
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# GH#5401
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left = DataFrame({"a": [1, 3]})
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right = DataFrame({"a": [3, 4]})
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msg = (
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"Can not pass on, right_on, left_on or set right_index=True or "
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"left_index=True"
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)
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with pytest.raises(MergeError, match=msg):
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left.join(right, how="cross", on="a")
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def test_merge_cross_series():
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# GH#54055
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ls = Series([1, 2, 3, 4], index=[1, 2, 3, 4], name="left")
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rs = Series([3, 4, 5, 6], index=[3, 4, 5, 6], name="right")
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res = merge(ls, rs, how="cross")
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expected = merge(ls.to_frame(), rs.to_frame(), how="cross")
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tm.assert_frame_equal(res, expected)
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@ -0,0 +1,186 @@
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import numpy as np
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import pytest
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from pandas import DataFrame
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import pandas._testing as tm
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@pytest.fixture
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def df1():
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return DataFrame(
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{
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"outer": [1, 1, 1, 2, 2, 2, 2, 3, 3, 4, 4],
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"inner": [1, 2, 3, 1, 2, 3, 4, 1, 2, 1, 2],
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"v1": np.linspace(0, 1, 11),
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}
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)
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@pytest.fixture
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def df2():
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return DataFrame(
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{
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"outer": [1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 3, 3],
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"inner": [1, 2, 2, 3, 3, 4, 2, 3, 1, 1, 2, 3],
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"v2": np.linspace(10, 11, 12),
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}
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)
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@pytest.fixture(params=[[], ["outer"], ["outer", "inner"]])
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def left_df(request, df1):
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"""Construct left test DataFrame with specified levels
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(any of 'outer', 'inner', and 'v1')
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"""
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levels = request.param
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if levels:
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df1 = df1.set_index(levels)
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return df1
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@pytest.fixture(params=[[], ["outer"], ["outer", "inner"]])
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def right_df(request, df2):
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"""Construct right test DataFrame with specified levels
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(any of 'outer', 'inner', and 'v2')
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"""
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levels = request.param
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if levels:
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df2 = df2.set_index(levels)
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return df2
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def compute_expected(df_left, df_right, on=None, left_on=None, right_on=None, how=None):
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"""
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Compute the expected merge result for the test case.
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This method computes the expected result of merging two DataFrames on
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a combination of their columns and index levels. It does so by
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explicitly dropping/resetting their named index levels, performing a
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merge on their columns, and then finally restoring the appropriate
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index in the result.
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Parameters
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----------
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df_left : DataFrame
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The left DataFrame (may have zero or more named index levels)
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df_right : DataFrame
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The right DataFrame (may have zero or more named index levels)
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on : list of str
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The on parameter to the merge operation
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left_on : list of str
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The left_on parameter to the merge operation
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right_on : list of str
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The right_on parameter to the merge operation
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how : str
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The how parameter to the merge operation
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Returns
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-------
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DataFrame
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The expected merge result
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"""
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# Handle on param if specified
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if on is not None:
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left_on, right_on = on, on
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# Compute input named index levels
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left_levels = [n for n in df_left.index.names if n is not None]
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right_levels = [n for n in df_right.index.names if n is not None]
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# Compute output named index levels
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output_levels = [i for i in left_on if i in right_levels and i in left_levels]
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# Drop index levels that aren't involved in the merge
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drop_left = [n for n in left_levels if n not in left_on]
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if drop_left:
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df_left = df_left.reset_index(drop_left, drop=True)
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drop_right = [n for n in right_levels if n not in right_on]
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if drop_right:
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df_right = df_right.reset_index(drop_right, drop=True)
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# Convert remaining index levels to columns
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reset_left = [n for n in left_levels if n in left_on]
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if reset_left:
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df_left = df_left.reset_index(level=reset_left)
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reset_right = [n for n in right_levels if n in right_on]
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if reset_right:
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df_right = df_right.reset_index(level=reset_right)
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# Perform merge
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expected = df_left.merge(df_right, left_on=left_on, right_on=right_on, how=how)
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# Restore index levels
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if output_levels:
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expected = expected.set_index(output_levels)
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return expected
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@pytest.mark.parametrize(
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"on,how",
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[
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(["outer"], "inner"),
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(["inner"], "left"),
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(["outer", "inner"], "right"),
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(["inner", "outer"], "outer"),
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],
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)
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def test_merge_indexes_and_columns_on(left_df, right_df, on, how):
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# Construct expected result
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expected = compute_expected(left_df, right_df, on=on, how=how)
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# Perform merge
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result = left_df.merge(right_df, on=on, how=how)
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tm.assert_frame_equal(result, expected, check_like=True)
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@pytest.mark.parametrize(
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"left_on,right_on,how",
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[
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(["outer"], ["outer"], "inner"),
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(["inner"], ["inner"], "right"),
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(["outer", "inner"], ["outer", "inner"], "left"),
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(["inner", "outer"], ["inner", "outer"], "outer"),
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],
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)
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def test_merge_indexes_and_columns_lefton_righton(
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left_df, right_df, left_on, right_on, how
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):
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# Construct expected result
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expected = compute_expected(
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left_df, right_df, left_on=left_on, right_on=right_on, how=how
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)
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# Perform merge
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result = left_df.merge(right_df, left_on=left_on, right_on=right_on, how=how)
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tm.assert_frame_equal(result, expected, check_like=True)
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@pytest.mark.parametrize("left_index", ["inner", ["inner", "outer"]])
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def test_join_indexes_and_columns_on(df1, df2, left_index, join_type):
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# Construct left_df
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left_df = df1.set_index(left_index)
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# Construct right_df
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right_df = df2.set_index(["outer", "inner"])
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# Result
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expected = (
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left_df.reset_index()
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.join(
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right_df, on=["outer", "inner"], how=join_type, lsuffix="_x", rsuffix="_y"
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)
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.set_index(left_index)
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)
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# Perform join
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result = left_df.join(
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right_df, on=["outer", "inner"], how=join_type, lsuffix="_x", rsuffix="_y"
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)
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tm.assert_frame_equal(result, expected, check_like=True)
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@ -0,0 +1,244 @@
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import re
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import numpy as np
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import pytest
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import pandas as pd
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from pandas import (
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DataFrame,
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merge_ordered,
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)
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import pandas._testing as tm
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@pytest.fixture
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def left():
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return DataFrame({"key": ["a", "c", "e"], "lvalue": [1, 2.0, 3]})
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@pytest.fixture
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def right():
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return DataFrame({"key": ["b", "c", "d", "f"], "rvalue": [1, 2, 3.0, 4]})
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class TestMergeOrdered:
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def test_basic(self, left, right):
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result = merge_ordered(left, right, on="key")
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expected = DataFrame(
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{
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"key": ["a", "b", "c", "d", "e", "f"],
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"lvalue": [1, np.nan, 2, np.nan, 3, np.nan],
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"rvalue": [np.nan, 1, 2, 3, np.nan, 4],
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}
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)
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tm.assert_frame_equal(result, expected)
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def test_ffill(self, left, right):
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result = merge_ordered(left, right, on="key", fill_method="ffill")
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expected = DataFrame(
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{
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"key": ["a", "b", "c", "d", "e", "f"],
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"lvalue": [1.0, 1, 2, 2, 3, 3.0],
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"rvalue": [np.nan, 1, 2, 3, 3, 4],
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}
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)
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tm.assert_frame_equal(result, expected)
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def test_multigroup(self, left, right):
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left = pd.concat([left, left], ignore_index=True)
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left["group"] = ["a"] * 3 + ["b"] * 3
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result = merge_ordered(
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left, right, on="key", left_by="group", fill_method="ffill"
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)
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expected = DataFrame(
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{
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"key": ["a", "b", "c", "d", "e", "f"] * 2,
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"lvalue": [1.0, 1, 2, 2, 3, 3.0] * 2,
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"rvalue": [np.nan, 1, 2, 3, 3, 4] * 2,
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}
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)
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expected["group"] = ["a"] * 6 + ["b"] * 6
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tm.assert_frame_equal(result, expected.loc[:, result.columns])
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result2 = merge_ordered(
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right, left, on="key", right_by="group", fill_method="ffill"
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)
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tm.assert_frame_equal(result, result2.loc[:, result.columns])
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result = merge_ordered(left, right, on="key", left_by="group")
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assert result["group"].notna().all()
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@pytest.mark.filterwarnings(
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"ignore:Passing a BlockManager|Passing a SingleBlockManager:DeprecationWarning"
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)
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def test_merge_type(self, left, right):
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class NotADataFrame(DataFrame):
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@property
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def _constructor(self):
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return NotADataFrame
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nad = NotADataFrame(left)
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result = nad.merge(right, on="key")
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assert isinstance(result, NotADataFrame)
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@pytest.mark.parametrize(
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"df_seq, pattern",
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[
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((), "[Nn]o objects"),
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([], "[Nn]o objects"),
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({}, "[Nn]o objects"),
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([None], "objects.*None"),
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([None, None], "objects.*None"),
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],
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)
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def test_empty_sequence_concat(self, df_seq, pattern):
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# GH 9157
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with pytest.raises(ValueError, match=pattern):
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pd.concat(df_seq)
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@pytest.mark.parametrize(
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"arg", [[DataFrame()], [None, DataFrame()], [DataFrame(), None]]
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)
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def test_empty_sequence_concat_ok(self, arg):
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pd.concat(arg)
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def test_doc_example(self):
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left = DataFrame(
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{
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"group": list("aaabbb"),
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"key": ["a", "c", "e", "a", "c", "e"],
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"lvalue": [1, 2, 3] * 2,
|
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}
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)
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right = DataFrame({"key": ["b", "c", "d"], "rvalue": [1, 2, 3]})
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result = merge_ordered(left, right, fill_method="ffill", left_by="group")
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expected = DataFrame(
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{
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"group": list("aaaaabbbbb"),
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"key": ["a", "b", "c", "d", "e"] * 2,
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"lvalue": [1, 1, 2, 2, 3] * 2,
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"rvalue": [np.nan, 1, 2, 3, 3] * 2,
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}
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)
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tm.assert_frame_equal(result, expected)
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|
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@pytest.mark.parametrize(
|
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"left, right, on, left_by, right_by, expected",
|
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[
|
||||
(
|
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DataFrame({"G": ["g", "g"], "H": ["h", "h"], "T": [1, 3]}),
|
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DataFrame({"T": [2], "E": [1]}),
|
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["T"],
|
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["G", "H"],
|
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None,
|
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DataFrame(
|
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{
|
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"G": ["g"] * 3,
|
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"H": ["h"] * 3,
|
||||
"T": [1, 2, 3],
|
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"E": [np.nan, 1.0, np.nan],
|
||||
}
|
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),
|
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),
|
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(
|
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DataFrame({"G": ["g", "g"], "H": ["h", "h"], "T": [1, 3]}),
|
||||
DataFrame({"T": [2], "E": [1]}),
|
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"T",
|
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["G", "H"],
|
||||
None,
|
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DataFrame(
|
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{
|
||||
"G": ["g"] * 3,
|
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"H": ["h"] * 3,
|
||||
"T": [1, 2, 3],
|
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"E": [np.nan, 1.0, np.nan],
|
||||
}
|
||||
),
|
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),
|
||||
(
|
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DataFrame({"T": [2], "E": [1]}),
|
||||
DataFrame({"G": ["g", "g"], "H": ["h", "h"], "T": [1, 3]}),
|
||||
["T"],
|
||||
None,
|
||||
["G", "H"],
|
||||
DataFrame(
|
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{
|
||||
"T": [1, 2, 3],
|
||||
"E": [np.nan, 1.0, np.nan],
|
||||
"G": ["g"] * 3,
|
||||
"H": ["h"] * 3,
|
||||
}
|
||||
),
|
||||
),
|
||||
],
|
||||
)
|
||||
def test_list_type_by(self, left, right, on, left_by, right_by, expected):
|
||||
# GH 35269
|
||||
result = merge_ordered(
|
||||
left=left,
|
||||
right=right,
|
||||
on=on,
|
||||
left_by=left_by,
|
||||
right_by=right_by,
|
||||
)
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
def test_left_by_length_equals_to_right_shape0(self):
|
||||
# GH 38166
|
||||
left = DataFrame([["g", "h", 1], ["g", "h", 3]], columns=list("GHE"))
|
||||
right = DataFrame([[2, 1]], columns=list("ET"))
|
||||
result = merge_ordered(left, right, on="E", left_by=["G", "H"])
|
||||
expected = DataFrame(
|
||||
{"G": ["g"] * 3, "H": ["h"] * 3, "E": [1, 2, 3], "T": [np.nan, 1.0, np.nan]}
|
||||
)
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
def test_elements_not_in_by_but_in_df(self):
|
||||
# GH 38167
|
||||
left = DataFrame([["g", "h", 1], ["g", "h", 3]], columns=list("GHE"))
|
||||
right = DataFrame([[2, 1]], columns=list("ET"))
|
||||
msg = r"\{'h'\} not found in left columns"
|
||||
with pytest.raises(KeyError, match=msg):
|
||||
merge_ordered(left, right, on="E", left_by=["G", "h"])
|
||||
|
||||
@pytest.mark.parametrize("invalid_method", ["linear", "carrot"])
|
||||
def test_ffill_validate_fill_method(self, left, right, invalid_method):
|
||||
# GH 55884
|
||||
with pytest.raises(
|
||||
ValueError, match=re.escape("fill_method must be 'ffill' or None")
|
||||
):
|
||||
merge_ordered(left, right, on="key", fill_method=invalid_method)
|
||||
|
||||
def test_ffill_left_merge(self):
|
||||
# GH 57010
|
||||
df1 = DataFrame(
|
||||
{
|
||||
"key": ["a", "c", "e", "a", "c", "e"],
|
||||
"lvalue": [1, 2, 3, 1, 2, 3],
|
||||
"group": ["a", "a", "a", "b", "b", "b"],
|
||||
}
|
||||
)
|
||||
df2 = DataFrame({"key": ["b", "c", "d"], "rvalue": [1, 2, 3]})
|
||||
result = merge_ordered(
|
||||
df1, df2, fill_method="ffill", left_by="group", how="left"
|
||||
)
|
||||
expected = DataFrame(
|
||||
{
|
||||
"key": ["a", "c", "e", "a", "c", "e"],
|
||||
"lvalue": [1, 2, 3, 1, 2, 3],
|
||||
"group": ["a", "a", "a", "b", "b", "b"],
|
||||
"rvalue": [np.nan, 2.0, 2.0, np.nan, 2.0, 2.0],
|
||||
}
|
||||
)
|
||||
tm.assert_frame_equal(result, expected)
|
||||
@ -0,0 +1,934 @@
|
||||
import numpy as np
|
||||
import pytest
|
||||
|
||||
import pandas.util._test_decorators as td
|
||||
|
||||
import pandas as pd
|
||||
from pandas import (
|
||||
DataFrame,
|
||||
Index,
|
||||
MultiIndex,
|
||||
RangeIndex,
|
||||
Series,
|
||||
Timestamp,
|
||||
option_context,
|
||||
)
|
||||
import pandas._testing as tm
|
||||
from pandas.core.reshape.concat import concat
|
||||
from pandas.core.reshape.merge import merge
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def left():
|
||||
"""left dataframe (not multi-indexed) for multi-index join tests"""
|
||||
# a little relevant example with NAs
|
||||
key1 = ["bar", "bar", "bar", "foo", "foo", "baz", "baz", "qux", "qux", "snap"]
|
||||
key2 = ["two", "one", "three", "one", "two", "one", "two", "two", "three", "one"]
|
||||
|
||||
data = np.random.default_rng(2).standard_normal(len(key1))
|
||||
return DataFrame({"key1": key1, "key2": key2, "data": data})
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def right(multiindex_dataframe_random_data):
|
||||
"""right dataframe (multi-indexed) for multi-index join tests"""
|
||||
df = multiindex_dataframe_random_data
|
||||
df.index.names = ["key1", "key2"]
|
||||
|
||||
df.columns = ["j_one", "j_two", "j_three"]
|
||||
return df
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def left_multi():
|
||||
return DataFrame(
|
||||
{
|
||||
"Origin": ["A", "A", "B", "B", "C"],
|
||||
"Destination": ["A", "B", "A", "C", "A"],
|
||||
"Period": ["AM", "AM", "IP", "AM", "OP"],
|
||||
"TripPurp": ["hbw", "nhb", "hbo", "nhb", "hbw"],
|
||||
"Trips": [1987, 3647, 2470, 4296, 4444],
|
||||
},
|
||||
columns=["Origin", "Destination", "Period", "TripPurp", "Trips"],
|
||||
).set_index(["Origin", "Destination", "Period", "TripPurp"])
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def right_multi():
|
||||
return DataFrame(
|
||||
{
|
||||
"Origin": ["A", "A", "B", "B", "C", "C", "E"],
|
||||
"Destination": ["A", "B", "A", "B", "A", "B", "F"],
|
||||
"Period": ["AM", "AM", "IP", "AM", "OP", "IP", "AM"],
|
||||
"LinkType": ["a", "b", "c", "b", "a", "b", "a"],
|
||||
"Distance": [100, 80, 90, 80, 75, 35, 55],
|
||||
},
|
||||
columns=["Origin", "Destination", "Period", "LinkType", "Distance"],
|
||||
).set_index(["Origin", "Destination", "Period", "LinkType"])
|
||||
|
||||
|
||||
@pytest.fixture
|
||||
def on_cols_multi():
|
||||
return ["Origin", "Destination", "Period"]
|
||||
|
||||
|
||||
class TestMergeMulti:
|
||||
def test_merge_on_multikey(self, left, right, join_type):
|
||||
on_cols = ["key1", "key2"]
|
||||
result = left.join(right, on=on_cols, how=join_type).reset_index(drop=True)
|
||||
|
||||
expected = merge(left, right.reset_index(), on=on_cols, how=join_type)
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
result = left.join(right, on=on_cols, how=join_type, sort=True).reset_index(
|
||||
drop=True
|
||||
)
|
||||
|
||||
expected = merge(
|
||||
left, right.reset_index(), on=on_cols, how=join_type, sort=True
|
||||
)
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
@pytest.mark.parametrize(
|
||||
"infer_string", [False, pytest.param(True, marks=td.skip_if_no("pyarrow"))]
|
||||
)
|
||||
@pytest.mark.parametrize("sort", [True, False])
|
||||
def test_left_join_multi_index(self, sort, infer_string):
|
||||
with option_context("future.infer_string", infer_string):
|
||||
icols = ["1st", "2nd", "3rd"]
|
||||
|
||||
def bind_cols(df):
|
||||
iord = lambda a: 0 if a != a else ord(a)
|
||||
f = lambda ts: ts.map(iord) - ord("a")
|
||||
return f(df["1st"]) + f(df["3rd"]) * 1e2 + df["2nd"].fillna(0) * 10
|
||||
|
||||
def run_asserts(left, right, sort):
|
||||
res = left.join(right, on=icols, how="left", sort=sort)
|
||||
|
||||
assert len(left) < len(res) + 1
|
||||
assert not res["4th"].isna().any()
|
||||
assert not res["5th"].isna().any()
|
||||
|
||||
tm.assert_series_equal(res["4th"], -res["5th"], check_names=False)
|
||||
result = bind_cols(res.iloc[:, :-2])
|
||||
tm.assert_series_equal(res["4th"], result, check_names=False)
|
||||
assert result.name is None
|
||||
|
||||
if sort:
|
||||
tm.assert_frame_equal(res, res.sort_values(icols, kind="mergesort"))
|
||||
|
||||
out = merge(left, right.reset_index(), on=icols, sort=sort, how="left")
|
||||
|
||||
res.index = RangeIndex(len(res))
|
||||
tm.assert_frame_equal(out, res)
|
||||
|
||||
lc = list(map(chr, np.arange(ord("a"), ord("z") + 1)))
|
||||
left = DataFrame(
|
||||
np.random.default_rng(2).choice(lc, (50, 2)), columns=["1st", "3rd"]
|
||||
)
|
||||
# Explicit cast to float to avoid implicit cast when setting nan
|
||||
left.insert(
|
||||
1,
|
||||
"2nd",
|
||||
np.random.default_rng(2).integers(0, 10, len(left)).astype("float"),
|
||||
)
|
||||
|
||||
i = np.random.default_rng(2).permutation(len(left))
|
||||
right = left.iloc[i].copy()
|
||||
|
||||
left["4th"] = bind_cols(left)
|
||||
right["5th"] = -bind_cols(right)
|
||||
right.set_index(icols, inplace=True)
|
||||
|
||||
run_asserts(left, right, sort)
|
||||
|
||||
# inject some nulls
|
||||
left.loc[1::4, "1st"] = np.nan
|
||||
left.loc[2::5, "2nd"] = np.nan
|
||||
left.loc[3::6, "3rd"] = np.nan
|
||||
left["4th"] = bind_cols(left)
|
||||
|
||||
i = np.random.default_rng(2).permutation(len(left))
|
||||
right = left.iloc[i, :-1]
|
||||
right["5th"] = -bind_cols(right)
|
||||
right.set_index(icols, inplace=True)
|
||||
|
||||
run_asserts(left, right, sort)
|
||||
|
||||
@pytest.mark.parametrize("sort", [False, True])
|
||||
def test_merge_right_vs_left(self, left, right, sort):
|
||||
# compare left vs right merge with multikey
|
||||
on_cols = ["key1", "key2"]
|
||||
merged_left_right = left.merge(
|
||||
right, left_on=on_cols, right_index=True, how="left", sort=sort
|
||||
)
|
||||
|
||||
merge_right_left = right.merge(
|
||||
left, right_on=on_cols, left_index=True, how="right", sort=sort
|
||||
)
|
||||
|
||||
# Reorder columns
|
||||
merge_right_left = merge_right_left[merged_left_right.columns]
|
||||
|
||||
tm.assert_frame_equal(merged_left_right, merge_right_left)
|
||||
|
||||
def test_merge_multiple_cols_with_mixed_cols_index(self):
|
||||
# GH29522
|
||||
s = Series(
|
||||
range(6),
|
||||
MultiIndex.from_product([["A", "B"], [1, 2, 3]], names=["lev1", "lev2"]),
|
||||
name="Amount",
|
||||
)
|
||||
df = DataFrame({"lev1": list("AAABBB"), "lev2": [1, 2, 3, 1, 2, 3], "col": 0})
|
||||
result = merge(df, s.reset_index(), on=["lev1", "lev2"])
|
||||
expected = DataFrame(
|
||||
{
|
||||
"lev1": list("AAABBB"),
|
||||
"lev2": [1, 2, 3, 1, 2, 3],
|
||||
"col": [0] * 6,
|
||||
"Amount": range(6),
|
||||
}
|
||||
)
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
def test_compress_group_combinations(self):
|
||||
# ~ 40000000 possible unique groups
|
||||
key1 = [str(i) for i in range(10000)]
|
||||
key1 = np.tile(key1, 2)
|
||||
key2 = key1[::-1]
|
||||
|
||||
df = DataFrame(
|
||||
{
|
||||
"key1": key1,
|
||||
"key2": key2,
|
||||
"value1": np.random.default_rng(2).standard_normal(20000),
|
||||
}
|
||||
)
|
||||
|
||||
df2 = DataFrame(
|
||||
{
|
||||
"key1": key1[::2],
|
||||
"key2": key2[::2],
|
||||
"value2": np.random.default_rng(2).standard_normal(10000),
|
||||
}
|
||||
)
|
||||
|
||||
# just to hit the label compression code path
|
||||
merge(df, df2, how="outer")
|
||||
|
||||
def test_left_join_index_preserve_order(self):
|
||||
on_cols = ["k1", "k2"]
|
||||
left = DataFrame(
|
||||
{
|
||||
"k1": [0, 1, 2] * 8,
|
||||
"k2": ["foo", "bar"] * 12,
|
||||
"v": np.array(np.arange(24), dtype=np.int64),
|
||||
}
|
||||
)
|
||||
|
||||
index = MultiIndex.from_tuples([(2, "bar"), (1, "foo")])
|
||||
right = DataFrame({"v2": [5, 7]}, index=index)
|
||||
|
||||
result = left.join(right, on=on_cols)
|
||||
|
||||
expected = left.copy()
|
||||
expected["v2"] = np.nan
|
||||
expected.loc[(expected.k1 == 2) & (expected.k2 == "bar"), "v2"] = 5
|
||||
expected.loc[(expected.k1 == 1) & (expected.k2 == "foo"), "v2"] = 7
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
result.sort_values(on_cols, kind="mergesort", inplace=True)
|
||||
expected = left.join(right, on=on_cols, sort=True)
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
# test join with multi dtypes blocks
|
||||
left = DataFrame(
|
||||
{
|
||||
"k1": [0, 1, 2] * 8,
|
||||
"k2": ["foo", "bar"] * 12,
|
||||
"k3": np.array([0, 1, 2] * 8, dtype=np.float32),
|
||||
"v": np.array(np.arange(24), dtype=np.int32),
|
||||
}
|
||||
)
|
||||
|
||||
index = MultiIndex.from_tuples([(2, "bar"), (1, "foo")])
|
||||
right = DataFrame({"v2": [5, 7]}, index=index)
|
||||
|
||||
result = left.join(right, on=on_cols)
|
||||
|
||||
expected = left.copy()
|
||||
expected["v2"] = np.nan
|
||||
expected.loc[(expected.k1 == 2) & (expected.k2 == "bar"), "v2"] = 5
|
||||
expected.loc[(expected.k1 == 1) & (expected.k2 == "foo"), "v2"] = 7
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
result = result.sort_values(on_cols, kind="mergesort")
|
||||
expected = left.join(right, on=on_cols, sort=True)
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
def test_left_join_index_multi_match_multiindex(self):
|
||||
left = DataFrame(
|
||||
[
|
||||
["X", "Y", "C", "a"],
|
||||
["W", "Y", "C", "e"],
|
||||
["V", "Q", "A", "h"],
|
||||
["V", "R", "D", "i"],
|
||||
["X", "Y", "D", "b"],
|
||||
["X", "Y", "A", "c"],
|
||||
["W", "Q", "B", "f"],
|
||||
["W", "R", "C", "g"],
|
||||
["V", "Y", "C", "j"],
|
||||
["X", "Y", "B", "d"],
|
||||
],
|
||||
columns=["cola", "colb", "colc", "tag"],
|
||||
index=[3, 2, 0, 1, 7, 6, 4, 5, 9, 8],
|
||||
)
|
||||
|
||||
right = DataFrame(
|
||||
[
|
||||
["W", "R", "C", 0],
|
||||
["W", "Q", "B", 3],
|
||||
["W", "Q", "B", 8],
|
||||
["X", "Y", "A", 1],
|
||||
["X", "Y", "A", 4],
|
||||
["X", "Y", "B", 5],
|
||||
["X", "Y", "C", 6],
|
||||
["X", "Y", "C", 9],
|
||||
["X", "Q", "C", -6],
|
||||
["X", "R", "C", -9],
|
||||
["V", "Y", "C", 7],
|
||||
["V", "R", "D", 2],
|
||||
["V", "R", "D", -1],
|
||||
["V", "Q", "A", -3],
|
||||
],
|
||||
columns=["col1", "col2", "col3", "val"],
|
||||
).set_index(["col1", "col2", "col3"])
|
||||
|
||||
result = left.join(right, on=["cola", "colb", "colc"], how="left")
|
||||
|
||||
expected = DataFrame(
|
||||
[
|
||||
["X", "Y", "C", "a", 6],
|
||||
["X", "Y", "C", "a", 9],
|
||||
["W", "Y", "C", "e", np.nan],
|
||||
["V", "Q", "A", "h", -3],
|
||||
["V", "R", "D", "i", 2],
|
||||
["V", "R", "D", "i", -1],
|
||||
["X", "Y", "D", "b", np.nan],
|
||||
["X", "Y", "A", "c", 1],
|
||||
["X", "Y", "A", "c", 4],
|
||||
["W", "Q", "B", "f", 3],
|
||||
["W", "Q", "B", "f", 8],
|
||||
["W", "R", "C", "g", 0],
|
||||
["V", "Y", "C", "j", 7],
|
||||
["X", "Y", "B", "d", 5],
|
||||
],
|
||||
columns=["cola", "colb", "colc", "tag", "val"],
|
||||
index=[3, 3, 2, 0, 1, 1, 7, 6, 6, 4, 4, 5, 9, 8],
|
||||
)
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
result = left.join(right, on=["cola", "colb", "colc"], how="left", sort=True)
|
||||
|
||||
expected = expected.sort_values(["cola", "colb", "colc"], kind="mergesort")
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
def test_left_join_index_multi_match(self):
|
||||
left = DataFrame(
|
||||
[["c", 0], ["b", 1], ["a", 2], ["b", 3]],
|
||||
columns=["tag", "val"],
|
||||
index=[2, 0, 1, 3],
|
||||
)
|
||||
|
||||
right = DataFrame(
|
||||
[
|
||||
["a", "v"],
|
||||
["c", "w"],
|
||||
["c", "x"],
|
||||
["d", "y"],
|
||||
["a", "z"],
|
||||
["c", "r"],
|
||||
["e", "q"],
|
||||
["c", "s"],
|
||||
],
|
||||
columns=["tag", "char"],
|
||||
).set_index("tag")
|
||||
|
||||
result = left.join(right, on="tag", how="left")
|
||||
|
||||
expected = DataFrame(
|
||||
[
|
||||
["c", 0, "w"],
|
||||
["c", 0, "x"],
|
||||
["c", 0, "r"],
|
||||
["c", 0, "s"],
|
||||
["b", 1, np.nan],
|
||||
["a", 2, "v"],
|
||||
["a", 2, "z"],
|
||||
["b", 3, np.nan],
|
||||
],
|
||||
columns=["tag", "val", "char"],
|
||||
index=[2, 2, 2, 2, 0, 1, 1, 3],
|
||||
)
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
result = left.join(right, on="tag", how="left", sort=True)
|
||||
expected2 = expected.sort_values("tag", kind="mergesort")
|
||||
|
||||
tm.assert_frame_equal(result, expected2)
|
||||
|
||||
# GH7331 - maintain left frame order in left merge
|
||||
result = merge(left, right.reset_index(), how="left", on="tag")
|
||||
expected.index = RangeIndex(len(expected))
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
def test_left_merge_na_buglet(self):
|
||||
left = DataFrame(
|
||||
{
|
||||
"id": list("abcde"),
|
||||
"v1": np.random.default_rng(2).standard_normal(5),
|
||||
"v2": np.random.default_rng(2).standard_normal(5),
|
||||
"dummy": list("abcde"),
|
||||
"v3": np.random.default_rng(2).standard_normal(5),
|
||||
},
|
||||
columns=["id", "v1", "v2", "dummy", "v3"],
|
||||
)
|
||||
right = DataFrame(
|
||||
{
|
||||
"id": ["a", "b", np.nan, np.nan, np.nan],
|
||||
"sv3": [1.234, 5.678, np.nan, np.nan, np.nan],
|
||||
}
|
||||
)
|
||||
|
||||
result = merge(left, right, on="id", how="left")
|
||||
|
||||
rdf = right.drop(["id"], axis=1)
|
||||
expected = left.join(rdf)
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
def test_merge_na_keys(self):
|
||||
data = [
|
||||
[1950, "A", 1.5],
|
||||
[1950, "B", 1.5],
|
||||
[1955, "B", 1.5],
|
||||
[1960, "B", np.nan],
|
||||
[1970, "B", 4.0],
|
||||
[1950, "C", 4.0],
|
||||
[1960, "C", np.nan],
|
||||
[1965, "C", 3.0],
|
||||
[1970, "C", 4.0],
|
||||
]
|
||||
|
||||
frame = DataFrame(data, columns=["year", "panel", "data"])
|
||||
|
||||
other_data = [
|
||||
[1960, "A", np.nan],
|
||||
[1970, "A", np.nan],
|
||||
[1955, "A", np.nan],
|
||||
[1965, "A", np.nan],
|
||||
[1965, "B", np.nan],
|
||||
[1955, "C", np.nan],
|
||||
]
|
||||
other = DataFrame(other_data, columns=["year", "panel", "data"])
|
||||
|
||||
result = frame.merge(other, how="outer")
|
||||
|
||||
expected = frame.fillna(-999).merge(other.fillna(-999), how="outer")
|
||||
expected = expected.replace(-999, np.nan)
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
@pytest.mark.parametrize("klass", [None, np.asarray, Series, Index])
|
||||
def test_merge_datetime_index(self, klass):
|
||||
# see gh-19038
|
||||
df = DataFrame(
|
||||
[1, 2, 3], ["2016-01-01", "2017-01-01", "2018-01-01"], columns=["a"]
|
||||
)
|
||||
df.index = pd.to_datetime(df.index)
|
||||
on_vector = df.index.year
|
||||
|
||||
if klass is not None:
|
||||
on_vector = klass(on_vector)
|
||||
|
||||
exp_years = np.array([2016, 2017, 2018], dtype=np.int32)
|
||||
expected = DataFrame({"a": [1, 2, 3], "key_1": exp_years})
|
||||
|
||||
result = df.merge(df, on=["a", on_vector], how="inner")
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
expected = DataFrame({"key_0": exp_years, "a_x": [1, 2, 3], "a_y": [1, 2, 3]})
|
||||
|
||||
result = df.merge(df, on=[df.index.year], how="inner")
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
@pytest.mark.parametrize("merge_type", ["left", "right"])
|
||||
def test_merge_datetime_multi_index_empty_df(self, merge_type):
|
||||
# see gh-36895
|
||||
|
||||
left = DataFrame(
|
||||
data={
|
||||
"data": [1.5, 1.5],
|
||||
},
|
||||
index=MultiIndex.from_tuples(
|
||||
[[Timestamp("1950-01-01"), "A"], [Timestamp("1950-01-02"), "B"]],
|
||||
names=["date", "panel"],
|
||||
),
|
||||
)
|
||||
|
||||
right = DataFrame(
|
||||
index=MultiIndex.from_tuples([], names=["date", "panel"]), columns=["state"]
|
||||
)
|
||||
|
||||
expected_index = MultiIndex.from_tuples(
|
||||
[[Timestamp("1950-01-01"), "A"], [Timestamp("1950-01-02"), "B"]],
|
||||
names=["date", "panel"],
|
||||
)
|
||||
|
||||
if merge_type == "left":
|
||||
expected = DataFrame(
|
||||
data={
|
||||
"data": [1.5, 1.5],
|
||||
"state": np.array([np.nan, np.nan], dtype=object),
|
||||
},
|
||||
index=expected_index,
|
||||
)
|
||||
results_merge = left.merge(right, how="left", on=["date", "panel"])
|
||||
results_join = left.join(right, how="left")
|
||||
else:
|
||||
expected = DataFrame(
|
||||
data={
|
||||
"state": np.array([np.nan, np.nan], dtype=object),
|
||||
"data": [1.5, 1.5],
|
||||
},
|
||||
index=expected_index,
|
||||
)
|
||||
results_merge = right.merge(left, how="right", on=["date", "panel"])
|
||||
results_join = right.join(left, how="right")
|
||||
|
||||
tm.assert_frame_equal(results_merge, expected)
|
||||
tm.assert_frame_equal(results_join, expected)
|
||||
|
||||
@pytest.fixture
|
||||
def household(self):
|
||||
household = DataFrame(
|
||||
{
|
||||
"household_id": [1, 2, 3],
|
||||
"male": [0, 1, 0],
|
||||
"wealth": [196087.3, 316478.7, 294750],
|
||||
},
|
||||
columns=["household_id", "male", "wealth"],
|
||||
).set_index("household_id")
|
||||
return household
|
||||
|
||||
@pytest.fixture
|
||||
def portfolio(self):
|
||||
portfolio = DataFrame(
|
||||
{
|
||||
"household_id": [1, 2, 2, 3, 3, 3, 4],
|
||||
"asset_id": [
|
||||
"nl0000301109",
|
||||
"nl0000289783",
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"lu0197800237",
|
||||
"nl0000289965",
|
||||
np.nan,
|
||||
],
|
||||
"name": [
|
||||
"ABN Amro",
|
||||
"Robeco",
|
||||
"Royal Dutch Shell",
|
||||
"Royal Dutch Shell",
|
||||
"AAB Eastern Europe Equity Fund",
|
||||
"Postbank BioTech Fonds",
|
||||
np.nan,
|
||||
],
|
||||
"share": [1.0, 0.4, 0.6, 0.15, 0.6, 0.25, 1.0],
|
||||
},
|
||||
columns=["household_id", "asset_id", "name", "share"],
|
||||
).set_index(["household_id", "asset_id"])
|
||||
return portfolio
|
||||
|
||||
@pytest.fixture
|
||||
def expected(self):
|
||||
expected = (
|
||||
DataFrame(
|
||||
{
|
||||
"male": [0, 1, 1, 0, 0, 0],
|
||||
"wealth": [
|
||||
196087.3,
|
||||
316478.7,
|
||||
316478.7,
|
||||
294750.0,
|
||||
294750.0,
|
||||
294750.0,
|
||||
],
|
||||
"name": [
|
||||
"ABN Amro",
|
||||
"Robeco",
|
||||
"Royal Dutch Shell",
|
||||
"Royal Dutch Shell",
|
||||
"AAB Eastern Europe Equity Fund",
|
||||
"Postbank BioTech Fonds",
|
||||
],
|
||||
"share": [1.00, 0.40, 0.60, 0.15, 0.60, 0.25],
|
||||
"household_id": [1, 2, 2, 3, 3, 3],
|
||||
"asset_id": [
|
||||
"nl0000301109",
|
||||
"nl0000289783",
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"lu0197800237",
|
||||
"nl0000289965",
|
||||
],
|
||||
}
|
||||
)
|
||||
.set_index(["household_id", "asset_id"])
|
||||
.reindex(columns=["male", "wealth", "name", "share"])
|
||||
)
|
||||
return expected
|
||||
|
||||
def test_join_multi_levels(self, portfolio, household, expected):
|
||||
portfolio = portfolio.copy()
|
||||
household = household.copy()
|
||||
|
||||
# GH 3662
|
||||
# merge multi-levels
|
||||
result = household.join(portfolio, how="inner")
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
def test_join_multi_levels_merge_equivalence(self, portfolio, household, expected):
|
||||
portfolio = portfolio.copy()
|
||||
household = household.copy()
|
||||
|
||||
# equivalency
|
||||
result = merge(
|
||||
household.reset_index(),
|
||||
portfolio.reset_index(),
|
||||
on=["household_id"],
|
||||
how="inner",
|
||||
).set_index(["household_id", "asset_id"])
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
def test_join_multi_levels_outer(self, portfolio, household, expected):
|
||||
portfolio = portfolio.copy()
|
||||
household = household.copy()
|
||||
|
||||
result = household.join(portfolio, how="outer")
|
||||
expected = concat(
|
||||
[
|
||||
expected,
|
||||
(
|
||||
DataFrame(
|
||||
{"share": [1.00]},
|
||||
index=MultiIndex.from_tuples(
|
||||
[(4, np.nan)], names=["household_id", "asset_id"]
|
||||
),
|
||||
)
|
||||
),
|
||||
],
|
||||
axis=0,
|
||||
sort=True,
|
||||
).reindex(columns=expected.columns)
|
||||
tm.assert_frame_equal(result, expected, check_index_type=False)
|
||||
|
||||
def test_join_multi_levels_invalid(self, portfolio, household):
|
||||
portfolio = portfolio.copy()
|
||||
household = household.copy()
|
||||
|
||||
# invalid cases
|
||||
household.index.name = "foo"
|
||||
|
||||
with pytest.raises(
|
||||
ValueError, match="cannot join with no overlapping index names"
|
||||
):
|
||||
household.join(portfolio, how="inner")
|
||||
|
||||
portfolio2 = portfolio.copy()
|
||||
portfolio2.index.set_names(["household_id", "foo"])
|
||||
|
||||
with pytest.raises(ValueError, match="columns overlap but no suffix specified"):
|
||||
portfolio2.join(portfolio, how="inner")
|
||||
|
||||
def test_join_multi_levels2(self):
|
||||
# some more advanced merges
|
||||
# GH6360
|
||||
household = DataFrame(
|
||||
{
|
||||
"household_id": [1, 2, 2, 3, 3, 3, 4],
|
||||
"asset_id": [
|
||||
"nl0000301109",
|
||||
"nl0000301109",
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"lu0197800237",
|
||||
"nl0000289965",
|
||||
np.nan,
|
||||
],
|
||||
"share": [1.0, 0.4, 0.6, 0.15, 0.6, 0.25, 1.0],
|
||||
},
|
||||
columns=["household_id", "asset_id", "share"],
|
||||
).set_index(["household_id", "asset_id"])
|
||||
|
||||
log_return = DataFrame(
|
||||
{
|
||||
"asset_id": [
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"lu0197800237",
|
||||
"lu0197800237",
|
||||
],
|
||||
"t": [233, 234, 235, 180, 181],
|
||||
"log_return": [
|
||||
0.09604978,
|
||||
-0.06524096,
|
||||
0.03532373,
|
||||
0.03025441,
|
||||
0.036997,
|
||||
],
|
||||
}
|
||||
).set_index(["asset_id", "t"])
|
||||
|
||||
expected = (
|
||||
DataFrame(
|
||||
{
|
||||
"household_id": [2, 2, 2, 3, 3, 3, 3, 3],
|
||||
"asset_id": [
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"lu0197800237",
|
||||
"lu0197800237",
|
||||
],
|
||||
"t": [233, 234, 235, 233, 234, 235, 180, 181],
|
||||
"share": [0.6, 0.6, 0.6, 0.15, 0.15, 0.15, 0.6, 0.6],
|
||||
"log_return": [
|
||||
0.09604978,
|
||||
-0.06524096,
|
||||
0.03532373,
|
||||
0.09604978,
|
||||
-0.06524096,
|
||||
0.03532373,
|
||||
0.03025441,
|
||||
0.036997,
|
||||
],
|
||||
}
|
||||
)
|
||||
.set_index(["household_id", "asset_id", "t"])
|
||||
.reindex(columns=["share", "log_return"])
|
||||
)
|
||||
|
||||
# this is the equivalency
|
||||
result = merge(
|
||||
household.reset_index(),
|
||||
log_return.reset_index(),
|
||||
on=["asset_id"],
|
||||
how="inner",
|
||||
).set_index(["household_id", "asset_id", "t"])
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
expected = (
|
||||
DataFrame(
|
||||
{
|
||||
"household_id": [2, 2, 2, 3, 3, 3, 3, 3, 3, 1, 2, 4],
|
||||
"asset_id": [
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"gb00b03mlx29",
|
||||
"lu0197800237",
|
||||
"lu0197800237",
|
||||
"nl0000289965",
|
||||
"nl0000301109",
|
||||
"nl0000301109",
|
||||
None,
|
||||
],
|
||||
"t": [
|
||||
233,
|
||||
234,
|
||||
235,
|
||||
233,
|
||||
234,
|
||||
235,
|
||||
180,
|
||||
181,
|
||||
None,
|
||||
None,
|
||||
None,
|
||||
None,
|
||||
],
|
||||
"share": [
|
||||
0.6,
|
||||
0.6,
|
||||
0.6,
|
||||
0.15,
|
||||
0.15,
|
||||
0.15,
|
||||
0.6,
|
||||
0.6,
|
||||
0.25,
|
||||
1.0,
|
||||
0.4,
|
||||
1.0,
|
||||
],
|
||||
"log_return": [
|
||||
0.09604978,
|
||||
-0.06524096,
|
||||
0.03532373,
|
||||
0.09604978,
|
||||
-0.06524096,
|
||||
0.03532373,
|
||||
0.03025441,
|
||||
0.036997,
|
||||
None,
|
||||
None,
|
||||
None,
|
||||
None,
|
||||
],
|
||||
}
|
||||
)
|
||||
.set_index(["household_id", "asset_id", "t"])
|
||||
.reindex(columns=["share", "log_return"])
|
||||
)
|
||||
|
||||
result = merge(
|
||||
household.reset_index(),
|
||||
log_return.reset_index(),
|
||||
on=["asset_id"],
|
||||
how="outer",
|
||||
).set_index(["household_id", "asset_id", "t"])
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
|
||||
class TestJoinMultiMulti:
|
||||
def test_join_multi_multi(self, left_multi, right_multi, join_type, on_cols_multi):
|
||||
left_names = left_multi.index.names
|
||||
right_names = right_multi.index.names
|
||||
if join_type == "right":
|
||||
level_order = right_names + left_names.difference(right_names)
|
||||
else:
|
||||
level_order = left_names + right_names.difference(left_names)
|
||||
# Multi-index join tests
|
||||
expected = (
|
||||
merge(
|
||||
left_multi.reset_index(),
|
||||
right_multi.reset_index(),
|
||||
how=join_type,
|
||||
on=on_cols_multi,
|
||||
)
|
||||
.set_index(level_order)
|
||||
.sort_index()
|
||||
)
|
||||
|
||||
result = left_multi.join(right_multi, how=join_type).sort_index()
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
def test_join_multi_empty_frames(
|
||||
self, left_multi, right_multi, join_type, on_cols_multi
|
||||
):
|
||||
left_multi = left_multi.drop(columns=left_multi.columns)
|
||||
right_multi = right_multi.drop(columns=right_multi.columns)
|
||||
|
||||
left_names = left_multi.index.names
|
||||
right_names = right_multi.index.names
|
||||
if join_type == "right":
|
||||
level_order = right_names + left_names.difference(right_names)
|
||||
else:
|
||||
level_order = left_names + right_names.difference(left_names)
|
||||
|
||||
expected = (
|
||||
merge(
|
||||
left_multi.reset_index(),
|
||||
right_multi.reset_index(),
|
||||
how=join_type,
|
||||
on=on_cols_multi,
|
||||
)
|
||||
.set_index(level_order)
|
||||
.sort_index()
|
||||
)
|
||||
|
||||
result = left_multi.join(right_multi, how=join_type).sort_index()
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
@pytest.mark.parametrize("box", [None, np.asarray, Series, Index])
|
||||
def test_merge_datetime_index(self, box):
|
||||
# see gh-19038
|
||||
df = DataFrame(
|
||||
[1, 2, 3], ["2016-01-01", "2017-01-01", "2018-01-01"], columns=["a"]
|
||||
)
|
||||
df.index = pd.to_datetime(df.index)
|
||||
on_vector = df.index.year
|
||||
|
||||
if box is not None:
|
||||
on_vector = box(on_vector)
|
||||
|
||||
exp_years = np.array([2016, 2017, 2018], dtype=np.int32)
|
||||
expected = DataFrame({"a": [1, 2, 3], "key_1": exp_years})
|
||||
|
||||
result = df.merge(df, on=["a", on_vector], how="inner")
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
expected = DataFrame({"key_0": exp_years, "a_x": [1, 2, 3], "a_y": [1, 2, 3]})
|
||||
|
||||
result = df.merge(df, on=[df.index.year], how="inner")
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
def test_single_common_level(self):
|
||||
index_left = MultiIndex.from_tuples(
|
||||
[("K0", "X0"), ("K0", "X1"), ("K1", "X2")], names=["key", "X"]
|
||||
)
|
||||
|
||||
left = DataFrame(
|
||||
{"A": ["A0", "A1", "A2"], "B": ["B0", "B1", "B2"]}, index=index_left
|
||||
)
|
||||
|
||||
index_right = MultiIndex.from_tuples(
|
||||
[("K0", "Y0"), ("K1", "Y1"), ("K2", "Y2"), ("K2", "Y3")], names=["key", "Y"]
|
||||
)
|
||||
|
||||
right = DataFrame(
|
||||
{"C": ["C0", "C1", "C2", "C3"], "D": ["D0", "D1", "D2", "D3"]},
|
||||
index=index_right,
|
||||
)
|
||||
|
||||
result = left.join(right)
|
||||
expected = merge(
|
||||
left.reset_index(), right.reset_index(), on=["key"], how="inner"
|
||||
).set_index(["key", "X", "Y"])
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
|
||||
def test_join_multi_wrong_order(self):
|
||||
# GH 25760
|
||||
# GH 28956
|
||||
|
||||
midx1 = MultiIndex.from_product([[1, 2], [3, 4]], names=["a", "b"])
|
||||
midx3 = MultiIndex.from_tuples([(4, 1), (3, 2), (3, 1)], names=["b", "a"])
|
||||
|
||||
left = DataFrame(index=midx1, data={"x": [10, 20, 30, 40]})
|
||||
right = DataFrame(index=midx3, data={"y": ["foo", "bar", "fing"]})
|
||||
|
||||
result = left.join(right)
|
||||
|
||||
expected = DataFrame(
|
||||
index=midx1,
|
||||
data={"x": [10, 20, 30, 40], "y": ["fing", "foo", "bar", np.nan]},
|
||||
)
|
||||
|
||||
tm.assert_frame_equal(result, expected)
|
||||
Reference in New Issue
Block a user