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71 lines
2.5 KiB
71 lines
2.5 KiB
1 year ago
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"""
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Testing interaction between the different managers (BlockManager, ArrayManager)
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"""
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from pandas.core.dtypes.missing import array_equivalent
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import pandas as pd
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import pandas._testing as tm
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from pandas.core.internals import (
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ArrayManager,
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BlockManager,
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SingleArrayManager,
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SingleBlockManager,
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)
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def test_dataframe_creation():
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with pd.option_context("mode.data_manager", "block"):
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df_block = pd.DataFrame({"a": [1, 2, 3], "b": [0.1, 0.2, 0.3], "c": [4, 5, 6]})
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assert isinstance(df_block._mgr, BlockManager)
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with pd.option_context("mode.data_manager", "array"):
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df_array = pd.DataFrame({"a": [1, 2, 3], "b": [0.1, 0.2, 0.3], "c": [4, 5, 6]})
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assert isinstance(df_array._mgr, ArrayManager)
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# also ensure both are seen as equal
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tm.assert_frame_equal(df_block, df_array)
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# conversion from one manager to the other
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result = df_block._as_manager("block")
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assert isinstance(result._mgr, BlockManager)
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result = df_block._as_manager("array")
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assert isinstance(result._mgr, ArrayManager)
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tm.assert_frame_equal(result, df_block)
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assert all(
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array_equivalent(left, right)
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for left, right in zip(result._mgr.arrays, df_array._mgr.arrays)
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)
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result = df_array._as_manager("array")
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assert isinstance(result._mgr, ArrayManager)
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result = df_array._as_manager("block")
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assert isinstance(result._mgr, BlockManager)
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tm.assert_frame_equal(result, df_array)
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assert len(result._mgr.blocks) == 2
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def test_series_creation():
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with pd.option_context("mode.data_manager", "block"):
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s_block = pd.Series([1, 2, 3], name="A", index=["a", "b", "c"])
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assert isinstance(s_block._mgr, SingleBlockManager)
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with pd.option_context("mode.data_manager", "array"):
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s_array = pd.Series([1, 2, 3], name="A", index=["a", "b", "c"])
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assert isinstance(s_array._mgr, SingleArrayManager)
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# also ensure both are seen as equal
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tm.assert_series_equal(s_block, s_array)
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# conversion from one manager to the other
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result = s_block._as_manager("block")
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assert isinstance(result._mgr, SingleBlockManager)
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result = s_block._as_manager("array")
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assert isinstance(result._mgr, SingleArrayManager)
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tm.assert_series_equal(result, s_block)
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result = s_array._as_manager("array")
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assert isinstance(result._mgr, SingleArrayManager)
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result = s_array._as_manager("block")
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assert isinstance(result._mgr, SingleBlockManager)
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tm.assert_series_equal(result, s_array)
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