frame_methods.py

import string
import warnings

import numpy as np

from pandas import DataFrame, MultiIndex, NaT, Series, date_range, isnull, period_range
import pandas.util.testing as tm


class GetNumericData:
    def setup(self):
        self.df = DataFrame(np.random.randn(10000, 25))
        self.df["foo"] = "bar"
        self.df["bar"] = "baz"
        self.df = self.df._consolidate()

    def time_frame_get_numeric_data(self):
        self.df._get_numeric_data()


class Lookup:
    def setup(self):
        self.df = DataFrame(np.random.randn(10000, 8), columns=list("abcdefgh"))
        self.df["foo"] = "bar"
        self.row_labels = list(self.df.index[::10])[:900]
        self.col_labels = list(self.df.columns) * 100
        self.row_labels_all = np.array(
            list(self.df.index) * len(self.df.columns), dtype="object"
        )
        self.col_labels_all = np.array(
            list(self.df.columns) * len(self.df.index), dtype="object"
        )

    def time_frame_fancy_lookup(self):
        self.df.lookup(self.row_labels, self.col_labels)

    def time_frame_fancy_lookup_all(self):
        self.df.lookup(self.row_labels_all, self.col_labels_all)


class Reindex:
    def setup(self):
        N = 10 ** 3
        self.df = DataFrame(np.random.randn(N * 10, N))
        self.idx = np.arange(4 * N, 7 * N)
        self.df2 = DataFrame(
            {
                c: {
                    0: np.random.randint(0, 2, N).astype(np.bool_),
                    1: np.random.randint(0, N, N).astype(np.int16),
                    2: np.random.randint(0, N, N).astype(np.int32),
                    3: np.random.randint(0, N, N).astype(np.int64),
                }[np.random.randint(0, 4)]
                for c in range(N)
            }
        )

    def time_reindex_axis0(self):
        self.df.reindex(self.idx)

    def time_reindex_axis1(self):
        self.df.reindex(columns=self.idx)

    def time_reindex_both_axes(self):
        self.df.reindex(index=self.idx, columns=self.idx)

    def time_reindex_upcast(self):
        self.df2.reindex(np.random.permutation(range(1200)))


class Rename:
    def setup(self):
        N = 10 ** 3
        self.df = DataFrame(np.random.randn(N * 10, N))
        self.idx = np.arange(4 * N, 7 * N)
        self.dict_idx = {k: k for k in self.idx}
        self.df2 = DataFrame(
            {
                c: {
                    0: np.random.randint(0, 2, N).astype(np.bool_),
                    1: np.random.randint(0, N, N).astype(np.int16),
                    2: np.random.randint(0, N, N).astype(np.int32),
                    3: np.random.randint(0, N, N).astype(np.int64),
                }[np.random.randint(0, 4)]
                for c in range(N)
            }
        )

    def time_rename_single(self):
        self.df.rename({0: 0})

    def time_rename_axis0(self):
        self.df.rename(self.dict_idx)

    def time_rename_axis1(self):
        self.df.rename(columns=self.dict_idx)

    def time_rename_both_axes(self):
        self.df.rename(index=self.dict_idx, columns=self.dict_idx)

    def time_dict_rename_both_axes(self):
        self.df.rename(index=self.dict_idx, columns=self.dict_idx)


class Iteration:
    # mem_itertuples_* benchmarks are slow
    timeout = 120

    def setup(self):
        N = 1000
        self.df = DataFrame(np.random.randn(N * 10, N))
        self.df2 = DataFrame(np.random.randn(N * 50, 10))
        self.df3 = DataFrame(
            np.random.randn(N, 5 * N), columns=["C" + str(c) for c in range(N * 5)]
        )
        self.df4 = DataFrame(np.random.randn(N * 1000, 10))

    def time_items(self):
        # (monitor no-copying behaviour)
        if hasattr(self.df, "_item_cache"):
            self.df._item_cache.clear()
        for name, col in self.df.items():
            pass

    def time_items_cached(self):
        for name, col in self.df.items():
            pass

    def time_iteritems_indexing(self):
        for col in self.df3:
            self.df3[col]

    def time_itertuples_start(self):
        self.df4.itertuples()

    def time_itertuples_read_first(self):
        next(self.df4.itertuples())

    def time_itertuples(self):
        for row in self.df4.itertuples():
            pass

    def time_itertuples_to_list(self):
        list(self.df4.itertuples())

    def mem_itertuples_start(self):
        return self.df4.itertuples()

    def peakmem_itertuples_start(self):
        self.df4.itertuples()

    def mem_itertuples_read_first(self):
        return next(self.df4.itertuples())

    def peakmem_itertuples(self):
        for row in self.df4.itertuples():
            pass

    def mem_itertuples_to_list(self):
        return list(self.df4.itertuples())

    def peakmem_itertuples_to_list(self):
        list(self.df4.itertuples())

    def time_itertuples_raw_start(self):
        self.df4.itertuples(index=False, name=None)

    def time_itertuples_raw_read_first(self):
        next(self.df4.itertuples(index=False, name=None))

    def time_itertuples_raw_tuples(self):
        for row in self.df4.itertuples(index=False, name=None):
            pass

    def time_itertuples_raw_tuples_to_list(self):
        list(self.df4.itertuples(index=False, name=None))

    def mem_itertuples_raw_start(self):
        return self.df4.itertuples(index=False, name=None)

    def peakmem_itertuples_raw_start(self):
        self.df4.itertuples(index=False, name=None)

    def peakmem_itertuples_raw_read_first(self):
        next(self.df4.itertuples(index=False, name=None))

    def peakmem_itertuples_raw(self):
        for row in self.df4.itertuples(index=False, name=None):
            pass

    def mem_itertuples_raw_to_list(self):
        return list(self.df4.itertuples(index=False, name=None))

    def peakmem_itertuples_raw_to_list(self):
        list(self.df4.itertuples(index=False, name=None))

    def time_iterrows(self):
        for row in self.df.iterrows():
            pass


class ToString:
    def setup(self):
        self.df = DataFrame(np.random.randn(100, 10))

    def time_to_string_floats(self):
        self.df.to_string()


class ToHTML:
    def setup(self):
        nrows = 500
        self.df2 = DataFrame(np.random.randn(nrows, 10))
        self.df2[0] = period_range("2000", periods=nrows)
        self.df2[1] = range(nrows)

    def time_to_html_mixed(self):
        self.df2.to_html()


class Repr:
    def setup(self):
        nrows = 10000
        data = np.random.randn(nrows, 10)
        arrays = np.tile(np.random.randn(3, int(nrows / 100)), 100)
        idx = MultiIndex.from_arrays(arrays)
        self.df3 = DataFrame(data, index=idx)
        self.df4 = DataFrame(data, index=np.random.randn(nrows))
        self.df_tall = DataFrame(np.random.randn(nrows, 10))
        self.df_wide = DataFrame(np.random.randn(10, nrows))

    def time_html_repr_trunc_mi(self):
        self.df3._repr_html_()

    def time_html_repr_trunc_si(self):
        self.df4._repr_html_()

    def time_repr_tall(self):
        repr(self.df_tall)

    def time_frame_repr_wide(self):
        repr(self.df_wide)


class MaskBool:
    def setup(self):
        data = np.random.randn(1000, 500)
        df = DataFrame(data)
        df = df.where(df > 0)
        self.bools = df > 0
        self.mask = isnull(df)

    def time_frame_mask_bools(self):
        self.bools.mask(self.mask)

    def time_frame_mask_floats(self):
        self.bools.astype(float).mask(self.mask)


class Isnull:
    def setup(self):
        N = 10 ** 3
        self.df_no_null = DataFrame(np.random.randn(N, N))

        sample = np.array([np.nan, 1.0])
        data = np.random.choice(sample, (N, N))
        self.df = DataFrame(data)

        sample = np.array(list(string.ascii_letters + string.whitespace))
        data = np.random.choice(sample, (N, N))
        self.df_strings = DataFrame(data)

        sample = np.array(
            [
                NaT,
                np.nan,
                None,
                np.datetime64("NaT"),
                np.timedelta64("NaT"),
                0,
                1,
                2.0,
                "",
                "abcd",
            ]
        )
        data = np.random.choice(sample, (N, N))
        self.df_obj = DataFrame(data)

    def time_isnull_floats_no_null(self):
        isnull(self.df_no_null)

    def time_isnull(self):
        isnull(self.df)

    def time_isnull_strngs(self):
        isnull(self.df_strings)

    def time_isnull_obj(self):
        isnull(self.df_obj)


class Fillna:

    params = ([True, False], ["pad", "bfill"])
    param_names = ["inplace", "method"]

    def setup(self, inplace, method):
        values = np.random.randn(10000, 100)
        values[::2] = np.nan
        self.df = DataFrame(values)

    def time_frame_fillna(self, inplace, method):
        self.df.fillna(inplace=inplace, method=method)


class Dropna:

    params = (["all", "any"], [0, 1])
    param_names = ["how", "axis"]

    def setup(self, how, axis):
        self.df = DataFrame(np.random.randn(10000, 1000))
        with warnings.catch_warnings(record=True):
            self.df.ix[50:1000, 20:50] = np.nan
            self.df.ix[2000:3000] = np.nan
            self.df.ix[:, 60:70] = np.nan
        self.df_mixed = self.df.copy()
        self.df_mixed["foo"] = "bar"

    def time_dropna(self, how, axis):
        self.df.dropna(how=how, axis=axis)

    def time_dropna_axis_mixed_dtypes(self, how, axis):
        self.df_mixed.dropna(how=how, axis=axis)


class Count:

    params = [0, 1]
    param_names = ["axis"]

    def setup(self, axis):
        self.df = DataFrame(np.random.randn(10000, 1000))
        with warnings.catch_warnings(record=True):
            self.df.ix[50:1000, 20:50] = np.nan
            self.df.ix[2000:3000] = np.nan
            self.df.ix[:, 60:70] = np.nan
        self.df_mixed = self.df.copy()
        self.df_mixed["foo"] = "bar"

        self.df.index = MultiIndex.from_arrays([self.df.index, self.df.index])
        self.df.columns = MultiIndex.from_arrays([self.df.columns, self.df.columns])
        self.df_mixed.index = MultiIndex.from_arrays(
            [self.df_mixed.index, self.df_mixed.index]
        )
        self.df_mixed.columns = MultiIndex.from_arrays(
            [self.df_mixed.columns, self.df_mixed.columns]
        )

    def time_count_level_multi(self, axis):
        self.df.count(axis=axis, level=1)

    def time_count_level_mixed_dtypes_multi(self, axis):
        self.df_mixed.count(axis=axis, level=1)


class Apply:
    def setup(self):
        self.df = DataFrame(np.random.randn(1000, 100))

        self.s = Series(np.arange(1028.0))
        self.df2 = DataFrame({i: self.s for i in range(1028)})
        self.df3 = DataFrame(np.random.randn(1000, 3), columns=list("ABC"))

    def time_apply_user_func(self):
        self.df2.apply(lambda x: np.corrcoef(x, self.s)[(0, 1)])

    def time_apply_axis_1(self):
        self.df.apply(lambda x: x + 1, axis=1)

    def time_apply_lambda_mean(self):
        self.df.apply(lambda x: x.mean())

    def time_apply_np_mean(self):
        self.df.apply(np.mean)

    def time_apply_pass_thru(self):
        self.df.apply(lambda x: x)

    def time_apply_ref_by_name(self):
        self.df3.apply(lambda x: x["A"] + x["B"], axis=1)


class Dtypes:
    def setup(self):
        self.df = DataFrame(np.random.randn(1000, 1000))

    def time_frame_dtypes(self):
        self.df.dtypes


class Equals:
    def setup(self):
        N = 10 ** 3
        self.float_df = DataFrame(np.random.randn(N, N))
        self.float_df_nan = self.float_df.copy()
        self.float_df_nan.iloc[-1, -1] = np.nan

        self.object_df = DataFrame("foo", index=range(N), columns=range(N))
        self.object_df_nan = self.object_df.copy()
        self.object_df_nan.iloc[-1, -1] = np.nan

        self.nonunique_cols = self.object_df.copy()
        self.nonunique_cols.columns = ["A"] * len(self.nonunique_cols.columns)
        self.nonunique_cols_nan = self.nonunique_cols.copy()
        self.nonunique_cols_nan.iloc[-1, -1] = np.nan

    def time_frame_float_equal(self):
        self.float_df.equals(self.float_df)

    def time_frame_float_unequal(self):
        self.float_df.equals(self.float_df_nan)

    def time_frame_nonunique_equal(self):
        self.nonunique_cols.equals(self.nonunique_cols)

    def time_frame_nonunique_unequal(self):
        self.nonunique_cols.equals(self.nonunique_cols_nan)

    def time_frame_object_equal(self):
        self.object_df.equals(self.object_df)

    def time_frame_object_unequal(self):
        self.object_df.equals(self.object_df_nan)


class Interpolate:

    params = [None, "infer"]
    param_names = ["downcast"]

    def setup(self, downcast):
        N = 10000
        # this is the worst case, where every column has NaNs.
        self.df = DataFrame(np.random.randn(N, 100))
        self.df.values[::2] = np.nan

        self.df2 = DataFrame(
            {
                "A": np.arange(0, N),
                "B": np.random.randint(0, 100, N),
                "C": np.random.randn(N),
                "D": np.random.randn(N),
            }
        )
        self.df2.loc[1::5, "A"] = np.nan
        self.df2.loc[1::5, "C"] = np.nan

    def time_interpolate(self, downcast):
        self.df.interpolate(downcast=downcast)

    def time_interpolate_some_good(self, downcast):
        self.df2.interpolate(downcast=downcast)


class Shift:
    # frame shift speedup issue-5609
    params = [0, 1]
    param_names = ["axis"]

    def setup(self, axis):
        self.df = DataFrame(np.random.rand(10000, 500))

    def time_shift(self, axis):
        self.df.shift(1, axis=axis)


class Nunique:
    def setup(self):
        self.df = DataFrame(np.random.randn(10000, 1000))

    def time_frame_nunique(self):
        self.df.nunique()


class Duplicated:
    def setup(self):
        n = 1 << 20
        t = date_range("2015-01-01", freq="S", periods=(n // 64))
        xs = np.random.randn(n // 64).round(2)
        self.df = DataFrame(
            {
                "a": np.random.randint(-1 << 8, 1 << 8, n),
                "b": np.random.choice(t, n),
                "c": np.random.choice(xs, n),
            }
        )
        self.df2 = DataFrame(np.random.randn(1000, 100).astype(str)).T

    def time_frame_duplicated(self):
        self.df.duplicated()

    def time_frame_duplicated_wide(self):
        self.df2.duplicated()


class XS:

    params = [0, 1]
    param_names = ["axis"]

    def setup(self, axis):
        self.N = 10 ** 4
        self.df = DataFrame(np.random.randn(self.N, self.N))

    def time_frame_xs(self, axis):
        self.df.xs(self.N / 2, axis=axis)


class SortValues:

    params = [True, False]
    param_names = ["ascending"]

    def setup(self, ascending):
        self.df = DataFrame(np.random.randn(1000000, 2), columns=list("AB"))

    def time_frame_sort_values(self, ascending):
        self.df.sort_values(by="A", ascending=ascending)


class SortIndexByColumns:
    def setup(self):
        N = 10000
        K = 10
        self.df = DataFrame(
            {
                "key1": tm.makeStringIndex(N).values.repeat(K),
                "key2": tm.makeStringIndex(N).values.repeat(K),
                "value": np.random.randn(N * K),
            }
        )

    def time_frame_sort_values_by_columns(self):
        self.df.sort_values(by=["key1", "key2"])


class Quantile:

    params = [0, 1]
    param_names = ["axis"]

    def setup(self, axis):
        self.df = DataFrame(np.random.randn(1000, 3), columns=list("ABC"))

    def time_frame_quantile(self, axis):
        self.df.quantile([0.1, 0.5], axis=axis)


class GetDtypeCounts:
    # 2807
    def setup(self):
        self.df = DataFrame(np.random.randn(10, 10000))

    def time_frame_get_dtype_counts(self):
        with warnings.catch_warnings(record=True):
            self.df.get_dtype_counts()

    def time_info(self):
        self.df.info()


class NSort:

    params = ["first", "last", "all"]
    param_names = ["keep"]

    def setup(self, keep):
        self.df = DataFrame(np.random.randn(100000, 3), columns=list("ABC"))

    def time_nlargest_one_column(self, keep):
        self.df.nlargest(100, "A", keep=keep)

    def time_nlargest_two_columns(self, keep):
        self.df.nlargest(100, ["A", "B"], keep=keep)

    def time_nsmallest_one_column(self, keep):
        self.df.nsmallest(100, "A", keep=keep)

    def time_nsmallest_two_columns(self, keep):
        self.df.nsmallest(100, ["A", "B"], keep=keep)


class Describe:
    def setup(self):
        self.df = DataFrame(
            {
                "a": np.random.randint(0, 100, int(1e6)),
                "b": np.random.randint(0, 100, int(1e6)),
                "c": np.random.randint(0, 100, int(1e6)),
            }
        )

    def time_series_describe(self):
        self.df["a"].describe()

    def time_dataframe_describe(self):
        self.df.describe()


from .pandas_vb_common import setup  # noqa: F401 isort:skip