75 lines
2.4 KiB
Python
75 lines
2.4 KiB
Python
import numpy as np
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import pytest
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import pandas.util._test_decorators as td
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from pandas import Series
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import pandas._testing as tm
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@td.skip_if_no("numba", "0.46.0")
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@pytest.mark.filterwarnings("ignore:\\nThe keyword argument")
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# Filter warnings when parallel=True and the function can't be parallelized by Numba
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class TestApply:
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@pytest.mark.parametrize("jit", [True, False])
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def test_numba_vs_cython(self, jit, nogil, parallel, nopython):
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def f(x, *args):
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arg_sum = 0
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for arg in args:
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arg_sum += arg
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return np.mean(x) + arg_sum
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if jit:
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import numba
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f = numba.jit(f)
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engine_kwargs = {"nogil": nogil, "parallel": parallel, "nopython": nopython}
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args = (2,)
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s = Series(range(10))
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result = s.rolling(2).apply(
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f, args=args, engine="numba", engine_kwargs=engine_kwargs, raw=True
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)
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expected = s.rolling(2).apply(f, engine="cython", args=args, raw=True)
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tm.assert_series_equal(result, expected)
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@pytest.mark.parametrize("jit", [True, False])
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def test_cache(self, jit, nogil, parallel, nopython):
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# Test that the functions are cached correctly if we switch functions
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def func_1(x):
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return np.mean(x) + 4
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def func_2(x):
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return np.std(x) * 5
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if jit:
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import numba
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func_1 = numba.jit(func_1)
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func_2 = numba.jit(func_2)
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engine_kwargs = {"nogil": nogil, "parallel": parallel, "nopython": nopython}
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roll = Series(range(10)).rolling(2)
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result = roll.apply(
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func_1, engine="numba", engine_kwargs=engine_kwargs, raw=True
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)
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expected = roll.apply(func_1, engine="cython", raw=True)
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tm.assert_series_equal(result, expected)
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# func_1 should be in the cache now
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assert func_1 in roll._numba_func_cache
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result = roll.apply(
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func_2, engine="numba", engine_kwargs=engine_kwargs, raw=True
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)
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expected = roll.apply(func_2, engine="cython", raw=True)
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tm.assert_series_equal(result, expected)
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# This run should use the cached func_1
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result = roll.apply(
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func_1, engine="numba", engine_kwargs=engine_kwargs, raw=True
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)
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expected = roll.apply(func_1, engine="cython", raw=True)
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tm.assert_series_equal(result, expected)
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