Test pytables refactor (pandas-dev#28746)

Author: tolaa001

pandas/tests/io/pytables/common.py

@@ -0,0 +1,82 @@
+from contextlib import contextmanager
+import os
+import tempfile
+
+import pytest
+
+from pandas.io.pytables import HDFStore
+
+tables = pytest.importorskip("tables")
+# set these parameters so we don't have file sharing
+tables.parameters.MAX_NUMEXPR_THREADS = 1
+tables.parameters.MAX_BLOSC_THREADS = 1
+tables.parameters.MAX_THREADS = 1
+
+
+def safe_remove(path):
+    if path is not None:
+        try:
+            os.remove(path)
+        except OSError:
+            pass
+
+
+def safe_close(store):
+    try:
+        if store is not None:
+            store.close()
+    except IOError:
+        pass
+
+
+def create_tempfile(path):
+    """ create an unopened named temporary file """
+    return os.path.join(tempfile.gettempdir(), path)
+
+
+# contextmanager to ensure the file cleanup
+@contextmanager
+def ensure_clean_store(path, mode="a", complevel=None, complib=None, fletcher32=False):
+
+    try:
+
+        # put in the temporary path if we don't have one already
+        if not len(os.path.dirname(path)):
+            path = create_tempfile(path)
+
+        store = HDFStore(
+            path, mode=mode, complevel=complevel, complib=complib, fletcher32=False
+        )
+        yield store
+    finally:
+        safe_close(store)
+        if mode == "w" or mode == "a":
+            safe_remove(path)
+
+
+@contextmanager
+def ensure_clean_path(path):
+    """
+    return essentially a named temporary file that is not opened
+    and deleted on exiting; if path is a list, then create and
+    return list of filenames
+    """
+    try:
+        if isinstance(path, list):
+            filenames = [create_tempfile(p) for p in path]
+            yield filenames
+        else:
+            filenames = [create_tempfile(path)]
+            yield filenames[0]
+    finally:
+        for f in filenames:
+            safe_remove(f)
+
+
+def _maybe_remove(store, key):
+    """For tests using tables, try removing the table to be sure there is
+    no content from previous tests using the same table name."""
+    try:
+        store.remove(key)
+    except (ValueError, KeyError):
+        pass

pandas/tests/io/pytables/conftest.py

@@ -0,0 +1,17 @@
+import pytest
+
+import pandas.util.testing as tm
+
+
+@pytest.fixture
+def setup_path():
+    """Fixture for setup path"""
+    return "tmp.__{}__.h5".format(tm.rands(10))
+
+
+@pytest.fixture(scope="module", autouse=True)
+def setup_mode():
+    """ Reset testing mode fixture"""
+    tm.reset_testing_mode()
+    yield
+    tm.set_testing_mode()

pandas/tests/io/pytables/test_compat.py

@@ -1,7 +1,7 @@
 import pytest
 
 import pandas as pd
-from pandas.tests.io.pytables.test_pytables import ensure_clean_path
+from pandas.tests.io.pytables.common import ensure_clean_path
 from pandas.util.testing import assert_frame_equal
 
 tables = pytest.importorskip("tables")

pandas/tests/io/pytables/test_complex.py

@@ -0,0 +1,186 @@
+from warnings import catch_warnings
+
+import numpy as np
+import pytest
+
+import pandas.util._test_decorators as td
+
+import pandas as pd
+from pandas import DataFrame, Series
+from pandas.tests.io.pytables.common import ensure_clean_path, ensure_clean_store
+import pandas.util.testing as tm
+from pandas.util.testing import assert_frame_equal
+
+from pandas.io.pytables import read_hdf
+
+# GH10447
+
+
+def test_complex_fixed(setup_path):
+    df = DataFrame(
+        np.random.rand(4, 5).astype(np.complex64),
+        index=list("abcd"),
+        columns=list("ABCDE"),
+    )
+
+    with ensure_clean_path(setup_path) as path:
+        df.to_hdf(path, "df")
+        reread = read_hdf(path, "df")
+        assert_frame_equal(df, reread)
+
+    df = DataFrame(
+        np.random.rand(4, 5).astype(np.complex128),
+        index=list("abcd"),
+        columns=list("ABCDE"),
+    )
+    with ensure_clean_path(setup_path) as path:
+        df.to_hdf(path, "df")
+        reread = read_hdf(path, "df")
+        assert_frame_equal(df, reread)
+
+
+def test_complex_table(setup_path):
+    df = DataFrame(
+        np.random.rand(4, 5).astype(np.complex64),
+        index=list("abcd"),
+        columns=list("ABCDE"),
+    )
+
+    with ensure_clean_path(setup_path) as path:
+        df.to_hdf(path, "df", format="table")
+        reread = read_hdf(path, "df")
+        assert_frame_equal(df, reread)
+
+    df = DataFrame(
+        np.random.rand(4, 5).astype(np.complex128),
+        index=list("abcd"),
+        columns=list("ABCDE"),
+    )
+
+    with ensure_clean_path(setup_path) as path:
+        df.to_hdf(path, "df", format="table", mode="w")
+        reread = read_hdf(path, "df")
+        assert_frame_equal(df, reread)
+
+
+@td.xfail_non_writeable
+def test_complex_mixed_fixed(setup_path):
+    complex64 = np.array(
+        [1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j], dtype=np.complex64
+    )
+    complex128 = np.array(
+        [1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j], dtype=np.complex128
+    )
+    df = DataFrame(
+        {
+            "A": [1, 2, 3, 4],
+            "B": ["a", "b", "c", "d"],
+            "C": complex64,
+            "D": complex128,
+            "E": [1.0, 2.0, 3.0, 4.0],
+        },
+        index=list("abcd"),
+    )
+    with ensure_clean_path(setup_path) as path:
+        df.to_hdf(path, "df")
+        reread = read_hdf(path, "df")
+        assert_frame_equal(df, reread)
+
+
+def test_complex_mixed_table(setup_path):
+    complex64 = np.array(
+        [1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j], dtype=np.complex64
+    )
+    complex128 = np.array(
+        [1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j], dtype=np.complex128
+    )
+    df = DataFrame(
+        {
+            "A": [1, 2, 3, 4],
+            "B": ["a", "b", "c", "d"],
+            "C": complex64,
+            "D": complex128,
+            "E": [1.0, 2.0, 3.0, 4.0],
+        },
+        index=list("abcd"),
+    )
+
+    with ensure_clean_store(setup_path) as store:
+        store.append("df", df, data_columns=["A", "B"])
+        result = store.select("df", where="A>2")
+        assert_frame_equal(df.loc[df.A > 2], result)
+
+    with ensure_clean_path(setup_path) as path:
+        df.to_hdf(path, "df", format="table")
+        reread = read_hdf(path, "df")
+        assert_frame_equal(df, reread)
+
+
+def test_complex_across_dimensions_fixed(setup_path):
+    with catch_warnings(record=True):
+        complex128 = np.array([1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j])
+        s = Series(complex128, index=list("abcd"))
+        df = DataFrame({"A": s, "B": s})
+
+        objs = [s, df]
+        comps = [tm.assert_series_equal, tm.assert_frame_equal]
+        for obj, comp in zip(objs, comps):
+            with ensure_clean_path(setup_path) as path:
+                obj.to_hdf(path, "obj", format="fixed")
+                reread = read_hdf(path, "obj")
+                comp(obj, reread)
+
+
+def test_complex_across_dimensions(setup_path):
+    complex128 = np.array([1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j])
+    s = Series(complex128, index=list("abcd"))
+    df = DataFrame({"A": s, "B": s})
+
+    with catch_warnings(record=True):
+
+        objs = [df]
+        comps = [tm.assert_frame_equal]
+        for obj, comp in zip(objs, comps):
+            with ensure_clean_path(setup_path) as path:
+                obj.to_hdf(path, "obj", format="table")
+                reread = read_hdf(path, "obj")
+                comp(obj, reread)
+
+
+def test_complex_indexing_error(setup_path):
+    complex128 = np.array(
+        [1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j], dtype=np.complex128
+    )
+    df = DataFrame(
+        {"A": [1, 2, 3, 4], "B": ["a", "b", "c", "d"], "C": complex128},
+        index=list("abcd"),
+    )
+    with ensure_clean_store(setup_path) as store:
+        with pytest.raises(TypeError):
+            store.append("df", df, data_columns=["C"])
+
+
+def test_complex_series_error(setup_path):
+    complex128 = np.array([1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j, 1.0 + 1.0j])
+    s = Series(complex128, index=list("abcd"))
+
+    with ensure_clean_path(setup_path) as path:
+        with pytest.raises(TypeError):
+            s.to_hdf(path, "obj", format="t")
+
+    with ensure_clean_path(setup_path) as path:
+        s.to_hdf(path, "obj", format="t", index=False)
+        reread = read_hdf(path, "obj")
+        tm.assert_series_equal(s, reread)
+
+
+def test_complex_append(setup_path):
+    df = DataFrame(
+        {"a": np.random.randn(100).astype(np.complex128), "b": np.random.randn(100)}
+    )
+
+    with ensure_clean_store(setup_path) as store:
+        store.append("df", df, data_columns=["b"])
+        store.append("df", df)
+        result = store.select("df")
+        assert_frame_equal(pd.concat([df, df], 0), result)