220 lines
7.3 KiB
Python
220 lines
7.3 KiB
Python
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import pytest
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from warnings import catch_warnings
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import numpy as np
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from pandas.util import testing as tm
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from pandas import Panel, date_range, DataFrame
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class TestPanel(object):
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def test_iloc_getitem_panel(self):
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with catch_warnings(record=True):
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# GH 7189
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p = Panel(np.arange(4 * 3 * 2).reshape(4, 3, 2),
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items=['A', 'B', 'C', 'D'],
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major_axis=['a', 'b', 'c'],
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minor_axis=['one', 'two'])
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result = p.iloc[1]
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expected = p.loc['B']
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tm.assert_frame_equal(result, expected)
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result = p.iloc[1, 1]
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expected = p.loc['B', 'b']
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tm.assert_series_equal(result, expected)
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result = p.iloc[1, 1, 1]
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expected = p.loc['B', 'b', 'two']
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assert result == expected
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# slice
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result = p.iloc[1:3]
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expected = p.loc[['B', 'C']]
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tm.assert_panel_equal(result, expected)
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result = p.iloc[:, 0:2]
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expected = p.loc[:, ['a', 'b']]
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tm.assert_panel_equal(result, expected)
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# list of integers
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result = p.iloc[[0, 2]]
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expected = p.loc[['A', 'C']]
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tm.assert_panel_equal(result, expected)
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# neg indicies
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result = p.iloc[[-1, 1], [-1, 1]]
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expected = p.loc[['D', 'B'], ['c', 'b']]
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tm.assert_panel_equal(result, expected)
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# dups indicies
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result = p.iloc[[-1, -1, 1], [-1, 1]]
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expected = p.loc[['D', 'D', 'B'], ['c', 'b']]
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tm.assert_panel_equal(result, expected)
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# combined
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result = p.iloc[0, [True, True], [0, 1]]
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expected = p.loc['A', ['a', 'b'], ['one', 'two']]
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tm.assert_frame_equal(result, expected)
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# out-of-bounds exception
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with pytest.raises(IndexError):
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p.iloc[tuple([10, 5])]
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def f():
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p.iloc[0, [True, True], [0, 1, 2]]
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pytest.raises(IndexError, f)
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# trying to use a label
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with pytest.raises(ValueError):
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p.iloc[tuple(['j', 'D'])]
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# GH
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p = Panel(
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np.random.rand(4, 3, 2), items=['A', 'B', 'C', 'D'],
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major_axis=['U', 'V', 'W'], minor_axis=['X', 'Y'])
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expected = p['A']
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result = p.iloc[0, :, :]
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tm.assert_frame_equal(result, expected)
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result = p.iloc[0, [True, True, True], :]
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tm.assert_frame_equal(result, expected)
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result = p.iloc[0, [True, True, True], [0, 1]]
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tm.assert_frame_equal(result, expected)
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def f():
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p.iloc[0, [True, True, True], [0, 1, 2]]
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pytest.raises(IndexError, f)
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def f():
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p.iloc[0, [True, True, True], [2]]
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pytest.raises(IndexError, f)
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def test_iloc_panel_issue(self):
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with catch_warnings(record=True):
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# see gh-3617
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p = Panel(np.random.randn(4, 4, 4))
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assert p.iloc[:3, :3, :3].shape == (3, 3, 3)
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assert p.iloc[1, :3, :3].shape == (3, 3)
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assert p.iloc[:3, 1, :3].shape == (3, 3)
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assert p.iloc[:3, :3, 1].shape == (3, 3)
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assert p.iloc[1, 1, :3].shape == (3, )
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assert p.iloc[1, :3, 1].shape == (3, )
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assert p.iloc[:3, 1, 1].shape == (3, )
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def test_panel_getitem(self):
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with catch_warnings(record=True):
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# GH4016, date selection returns a frame when a partial string
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# selection
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ind = date_range(start="2000", freq="D", periods=1000)
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df = DataFrame(
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np.random.randn(
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len(ind), 5), index=ind, columns=list('ABCDE'))
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panel = Panel({'frame_' + c: df for c in list('ABC')})
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test2 = panel.loc[:, "2002":"2002-12-31"]
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test1 = panel.loc[:, "2002"]
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tm.assert_panel_equal(test1, test2)
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# GH8710
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# multi-element getting with a list
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panel = tm.makePanel()
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expected = panel.iloc[[0, 1]]
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result = panel.loc[['ItemA', 'ItemB']]
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tm.assert_panel_equal(result, expected)
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result = panel.loc[['ItemA', 'ItemB'], :, :]
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tm.assert_panel_equal(result, expected)
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result = panel[['ItemA', 'ItemB']]
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tm.assert_panel_equal(result, expected)
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result = panel.loc['ItemA':'ItemB']
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tm.assert_panel_equal(result, expected)
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with catch_warnings(record=True):
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result = panel.ix[['ItemA', 'ItemB']]
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tm.assert_panel_equal(result, expected)
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# with an object-like
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# GH 9140
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class TestObject(object):
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def __str__(self):
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return "TestObject"
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obj = TestObject()
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p = Panel(np.random.randn(1, 5, 4), items=[obj],
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major_axis=date_range('1/1/2000', periods=5),
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minor_axis=['A', 'B', 'C', 'D'])
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expected = p.iloc[0]
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result = p[obj]
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tm.assert_frame_equal(result, expected)
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def test_panel_setitem(self):
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with catch_warnings(record=True):
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# GH 7763
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# loc and setitem have setting differences
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np.random.seed(0)
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index = range(3)
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columns = list('abc')
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panel = Panel({'A': DataFrame(np.random.randn(3, 3),
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index=index, columns=columns),
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'B': DataFrame(np.random.randn(3, 3),
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index=index, columns=columns),
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'C': DataFrame(np.random.randn(3, 3),
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index=index, columns=columns)})
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replace = DataFrame(np.eye(3, 3), index=range(3), columns=columns)
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expected = Panel({'A': replace, 'B': replace, 'C': replace})
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p = panel.copy()
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for idx in list('ABC'):
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p[idx] = replace
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tm.assert_panel_equal(p, expected)
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p = panel.copy()
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for idx in list('ABC'):
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p.loc[idx, :, :] = replace
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tm.assert_panel_equal(p, expected)
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def test_panel_assignment(self):
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with catch_warnings(record=True):
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# GH3777
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wp = Panel(np.random.randn(2, 5, 4), items=['Item1', 'Item2'],
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major_axis=date_range('1/1/2000', periods=5),
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minor_axis=['A', 'B', 'C', 'D'])
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wp2 = Panel(np.random.randn(2, 5, 4), items=['Item1', 'Item2'],
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major_axis=date_range('1/1/2000', periods=5),
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minor_axis=['A', 'B', 'C', 'D'])
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# TODO: unused?
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# expected = wp.loc[['Item1', 'Item2'], :, ['A', 'B']]
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def f():
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wp.loc[['Item1', 'Item2'], :, ['A', 'B']] = wp2.loc[
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['Item1', 'Item2'], :, ['A', 'B']]
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pytest.raises(NotImplementedError, f)
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# to_assign = wp2.loc[['Item1', 'Item2'], :, ['A', 'B']]
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# wp.loc[['Item1', 'Item2'], :, ['A', 'B']] = to_assign
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# result = wp.loc[['Item1', 'Item2'], :, ['A', 'B']]
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# tm.assert_panel_equal(result,expected)
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