Python numpy.positive() Examples

The following are 30 code examples for showing how to use numpy.positive(). These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example.

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Example 1
Project: mars   Author: mars-project   File: positive.py    License: Apache License 2.0 6 votes vote down vote up
def positive(x, out=None, where=None, **kwargs):
    """
    Numerical positive, element-wise.

    Parameters
    ----------
    x : array_like or scalar
        Input tensor.

    Returns
    -------
    y : Tensor or scalar
        Returned array or scalar: `y = +x`.
    """
    op = TensorPositive(**kwargs)
    return op(x, out=out, where=where) 
Example 2
Project: recruit   Author: Frank-qlu   File: test_datetime.py    License: Apache License 2.0 5 votes vote down vote up
def test_datetime_unary(self):
        for tda, tdb, tdzero, tdone, tdmone in \
                [
                 # One-dimensional arrays
                 (np.array([3], dtype='m8[D]'),
                  np.array([-3], dtype='m8[D]'),
                  np.array([0], dtype='m8[D]'),
                  np.array([1], dtype='m8[D]'),
                  np.array([-1], dtype='m8[D]')),
                 # NumPy scalars
                 (np.timedelta64(3, '[D]'),
                  np.timedelta64(-3, '[D]'),
                  np.timedelta64(0, '[D]'),
                  np.timedelta64(1, '[D]'),
                  np.timedelta64(-1, '[D]'))]:
            # negative ufunc
            assert_equal(-tdb, tda)
            assert_equal((-tdb).dtype, tda.dtype)
            assert_equal(np.negative(tdb), tda)
            assert_equal(np.negative(tdb).dtype, tda.dtype)

            # positive ufunc
            assert_equal(np.positive(tda), tda)
            assert_equal(np.positive(tda).dtype, tda.dtype)
            assert_equal(np.positive(tdb), tdb)
            assert_equal(np.positive(tdb).dtype, tdb.dtype)

            # absolute ufunc
            assert_equal(np.absolute(tdb), tda)
            assert_equal(np.absolute(tdb).dtype, tda.dtype)

            # sign ufunc
            assert_equal(np.sign(tda), tdone)
            assert_equal(np.sign(tdb), tdmone)
            assert_equal(np.sign(tdzero), tdzero)
            assert_equal(np.sign(tda).dtype, tda.dtype)

            # The ufuncs always produce native-endian results
            assert_ 
Example 3
Project: recruit   Author: Frank-qlu   File: test_datetime.py    License: Apache License 2.0 5 votes vote down vote up
def test_string_parser_variants(self):
        # Allow space instead of 'T' between date and time
        assert_equal(np.array(['1980-02-29T01:02:03'], np.dtype('M8[s]')),
                     np.array(['1980-02-29 01:02:03'], np.dtype('M8[s]')))
        # Allow positive years
        assert_equal(np.array(['+1980-02-29T01:02:03'], np.dtype('M8[s]')),
                     np.array(['+1980-02-29 01:02:03'], np.dtype('M8[s]')))
        # Allow negative years
        assert_equal(np.array(['-1980-02-29T01:02:03'], np.dtype('M8[s]')),
                     np.array(['-1980-02-29 01:02:03'], np.dtype('M8[s]')))
        # UTC specifier
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['+1980-02-29T01:02:03'], np.dtype('M8[s]')),
                np.array(['+1980-02-29 01:02:03Z'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['-1980-02-29T01:02:03'], np.dtype('M8[s]')),
                np.array(['-1980-02-29 01:02:03Z'], np.dtype('M8[s]')))
        # Time zone offset
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['1980-02-29T02:02:03'], np.dtype('M8[s]')),
                np.array(['1980-02-29 00:32:03-0130'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['1980-02-28T22:32:03'], np.dtype('M8[s]')),
                np.array(['1980-02-29 00:02:03+01:30'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['1980-02-29T02:32:03.506'], np.dtype('M8[s]')),
                np.array(['1980-02-29 00:32:03.506-02'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(np.datetime64('1977-03-02T12:30-0230'),
                         np.datetime64('1977-03-02T15:00')) 
Example 4
Project: recruit   Author: Frank-qlu   File: test_umath.py    License: Apache License 2.0 5 votes vote down vote up
def test_floor_division_signed_zero(self):
        # Check that the sign bit is correctly set when dividing positive and
        # negative zero by one.
        x = np.zeros(10)
        assert_equal(np.signbit(x//1), 0)
        assert_equal(np.signbit((-x)//1), 1) 
Example 5
Project: recruit   Author: Frank-qlu   File: test_umath.py    License: Apache License 2.0 5 votes vote down vote up
def test_power_zero(self):
        # ticket #1271
        zero = np.array([0j])
        one = np.array([1+0j])
        cnan = np.array([complex(np.nan, np.nan)])
        # FIXME cinf not tested.
        #cinf = np.array([complex(np.inf, 0)])

        def assert_complex_equal(x, y):
            x, y = np.asarray(x), np.asarray(y)
            assert_array_equal(x.real, y.real)
            assert_array_equal(x.imag, y.imag)

        # positive powers
        for p in [0.33, 0.5, 1, 1.5, 2, 3, 4, 5, 6.6]:
            assert_complex_equal(np.power(zero, p), zero)

        # zero power
        assert_complex_equal(np.power(zero, 0), one)
        with np.errstate(invalid="ignore"):
            assert_complex_equal(np.power(zero, 0+1j), cnan)

            # negative power
            for p in [0.33, 0.5, 1, 1.5, 2, 3, 4, 5, 6.6]:
                assert_complex_equal(np.power(zero, -p), cnan)
            assert_complex_equal(np.power(zero, -1+0.2j), cnan) 
Example 6
Project: recruit   Author: Frank-qlu   File: test_umath.py    License: Apache License 2.0 5 votes vote down vote up
def test_valid(self):
        valid_dtypes = [int, float, complex, object]
        for dtype in valid_dtypes:
            x = np.arange(5, dtype=dtype)
            result = np.positive(x)
            assert_equal(x, result, err_msg=str(dtype)) 
Example 7
Project: recruit   Author: Frank-qlu   File: test_umath.py    License: Apache License 2.0 5 votes vote down vote up
def test_invalid(self):
        with assert_raises(TypeError):
            np.positive(True)
        with assert_raises(TypeError):
            np.positive(np.datetime64('2000-01-01'))
        with assert_raises(TypeError):
            np.positive(np.array(['foo'], dtype=str))
        with assert_raises(TypeError):
            np.positive(np.array(['bar'], dtype=object)) 
Example 8
Project: recruit   Author: Frank-qlu   File: test_umath.py    License: Apache License 2.0 5 votes vote down vote up
def test_pos_nan():
    """Check np.nan is a positive nan."""
    assert_(np.signbit(np.nan) == 0) 
Example 9
Project: vnpy_crypto   Author: birforce   File: test_datetime.py    License: MIT License 5 votes vote down vote up
def test_datetime_unary(self):
        for tda, tdb, tdzero, tdone, tdmone in \
                [
                 # One-dimensional arrays
                 (np.array([3], dtype='m8[D]'),
                  np.array([-3], dtype='m8[D]'),
                  np.array([0], dtype='m8[D]'),
                  np.array([1], dtype='m8[D]'),
                  np.array([-1], dtype='m8[D]')),
                 # NumPy scalars
                 (np.timedelta64(3, '[D]'),
                  np.timedelta64(-3, '[D]'),
                  np.timedelta64(0, '[D]'),
                  np.timedelta64(1, '[D]'),
                  np.timedelta64(-1, '[D]'))]:
            # negative ufunc
            assert_equal(-tdb, tda)
            assert_equal((-tdb).dtype, tda.dtype)
            assert_equal(np.negative(tdb), tda)
            assert_equal(np.negative(tdb).dtype, tda.dtype)

            # positive ufunc
            assert_equal(np.positive(tda), tda)
            assert_equal(np.positive(tda).dtype, tda.dtype)
            assert_equal(np.positive(tdb), tdb)
            assert_equal(np.positive(tdb).dtype, tdb.dtype)

            # absolute ufunc
            assert_equal(np.absolute(tdb), tda)
            assert_equal(np.absolute(tdb).dtype, tda.dtype)

            # sign ufunc
            assert_equal(np.sign(tda), tdone)
            assert_equal(np.sign(tdb), tdmone)
            assert_equal(np.sign(tdzero), tdzero)
            assert_equal(np.sign(tda).dtype, tda.dtype)

            # The ufuncs always produce native-endian results
            assert_ 
Example 10
Project: vnpy_crypto   Author: birforce   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_power_zero(self):
        # ticket #1271
        zero = np.array([0j])
        one = np.array([1+0j])
        cnan = np.array([complex(np.nan, np.nan)])
        # FIXME cinf not tested.
        #cinf = np.array([complex(np.inf, 0)])

        def assert_complex_equal(x, y):
            x, y = np.asarray(x), np.asarray(y)
            assert_array_equal(x.real, y.real)
            assert_array_equal(x.imag, y.imag)

        # positive powers
        for p in [0.33, 0.5, 1, 1.5, 2, 3, 4, 5, 6.6]:
            assert_complex_equal(np.power(zero, p), zero)

        # zero power
        assert_complex_equal(np.power(zero, 0), one)
        with np.errstate(invalid="ignore"):
            assert_complex_equal(np.power(zero, 0+1j), cnan)

            # negative power
            for p in [0.33, 0.5, 1, 1.5, 2, 3, 4, 5, 6.6]:
                assert_complex_equal(np.power(zero, -p), cnan)
            assert_complex_equal(np.power(zero, -1+0.2j), cnan) 
Example 11
Project: vnpy_crypto   Author: birforce   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_exceptions(self):
        a = np.ones(1, dtype=np.bool_)
        assert_raises(TypeError, np.negative, a)
        assert_raises(TypeError, np.positive, a)
        assert_raises(TypeError, np.subtract, a, a) 
Example 12
Project: vnpy_crypto   Author: birforce   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_valid(self):
        valid_dtypes = [int, float, complex, object]
        for dtype in valid_dtypes:
            x = np.arange(5, dtype=dtype)
            result = np.positive(x)
            assert_equal(x, result, err_msg=str(dtype)) 
Example 13
Project: vnpy_crypto   Author: birforce   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_pos_nan():
    """Check np.nan is a positive nan."""
    assert_(np.signbit(np.nan) == 0) 
Example 14
Project: Mastering-Elasticsearch-7.0   Author: PacktPublishing   File: test_datetime.py    License: MIT License 5 votes vote down vote up
def test_datetime_unary(self):
        for tda, tdb, tdzero, tdone, tdmone in \
                [
                 # One-dimensional arrays
                 (np.array([3], dtype='m8[D]'),
                  np.array([-3], dtype='m8[D]'),
                  np.array([0], dtype='m8[D]'),
                  np.array([1], dtype='m8[D]'),
                  np.array([-1], dtype='m8[D]')),
                 # NumPy scalars
                 (np.timedelta64(3, '[D]'),
                  np.timedelta64(-3, '[D]'),
                  np.timedelta64(0, '[D]'),
                  np.timedelta64(1, '[D]'),
                  np.timedelta64(-1, '[D]'))]:
            # negative ufunc
            assert_equal(-tdb, tda)
            assert_equal((-tdb).dtype, tda.dtype)
            assert_equal(np.negative(tdb), tda)
            assert_equal(np.negative(tdb).dtype, tda.dtype)

            # positive ufunc
            assert_equal(np.positive(tda), tda)
            assert_equal(np.positive(tda).dtype, tda.dtype)
            assert_equal(np.positive(tdb), tdb)
            assert_equal(np.positive(tdb).dtype, tdb.dtype)

            # absolute ufunc
            assert_equal(np.absolute(tdb), tda)
            assert_equal(np.absolute(tdb).dtype, tda.dtype)

            # sign ufunc
            assert_equal(np.sign(tda), tdone)
            assert_equal(np.sign(tdb), tdmone)
            assert_equal(np.sign(tdzero), tdzero)
            assert_equal(np.sign(tda).dtype, tda.dtype)

            # The ufuncs always produce native-endian results
            assert_ 
Example 15
Project: Mastering-Elasticsearch-7.0   Author: PacktPublishing   File: test_datetime.py    License: MIT License 5 votes vote down vote up
def test_string_parser_variants(self):
        # Allow space instead of 'T' between date and time
        assert_equal(np.array(['1980-02-29T01:02:03'], np.dtype('M8[s]')),
                     np.array(['1980-02-29 01:02:03'], np.dtype('M8[s]')))
        # Allow positive years
        assert_equal(np.array(['+1980-02-29T01:02:03'], np.dtype('M8[s]')),
                     np.array(['+1980-02-29 01:02:03'], np.dtype('M8[s]')))
        # Allow negative years
        assert_equal(np.array(['-1980-02-29T01:02:03'], np.dtype('M8[s]')),
                     np.array(['-1980-02-29 01:02:03'], np.dtype('M8[s]')))
        # UTC specifier
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['+1980-02-29T01:02:03'], np.dtype('M8[s]')),
                np.array(['+1980-02-29 01:02:03Z'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['-1980-02-29T01:02:03'], np.dtype('M8[s]')),
                np.array(['-1980-02-29 01:02:03Z'], np.dtype('M8[s]')))
        # Time zone offset
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['1980-02-29T02:02:03'], np.dtype('M8[s]')),
                np.array(['1980-02-29 00:32:03-0130'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['1980-02-28T22:32:03'], np.dtype('M8[s]')),
                np.array(['1980-02-29 00:02:03+01:30'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['1980-02-29T02:32:03.506'], np.dtype('M8[s]')),
                np.array(['1980-02-29 00:32:03.506-02'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(np.datetime64('1977-03-02T12:30-0230'),
                         np.datetime64('1977-03-02T15:00')) 
Example 16
Project: Mastering-Elasticsearch-7.0   Author: PacktPublishing   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_floor_division_signed_zero(self):
        # Check that the sign bit is correctly set when dividing positive and
        # negative zero by one.
        x = np.zeros(10)
        assert_equal(np.signbit(x//1), 0)
        assert_equal(np.signbit((-x)//1), 1) 
Example 17
Project: Mastering-Elasticsearch-7.0   Author: PacktPublishing   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_power_zero(self):
        # ticket #1271
        zero = np.array([0j])
        one = np.array([1+0j])
        cnan = np.array([complex(np.nan, np.nan)])
        # FIXME cinf not tested.
        #cinf = np.array([complex(np.inf, 0)])

        def assert_complex_equal(x, y):
            x, y = np.asarray(x), np.asarray(y)
            assert_array_equal(x.real, y.real)
            assert_array_equal(x.imag, y.imag)

        # positive powers
        for p in [0.33, 0.5, 1, 1.5, 2, 3, 4, 5, 6.6]:
            assert_complex_equal(np.power(zero, p), zero)

        # zero power
        assert_complex_equal(np.power(zero, 0), one)
        with np.errstate(invalid="ignore"):
            assert_complex_equal(np.power(zero, 0+1j), cnan)

            # negative power
            for p in [0.33, 0.5, 1, 1.5, 2, 3, 4, 5, 6.6]:
                assert_complex_equal(np.power(zero, -p), cnan)
            assert_complex_equal(np.power(zero, -1+0.2j), cnan) 
Example 18
Project: Mastering-Elasticsearch-7.0   Author: PacktPublishing   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_valid(self):
        valid_dtypes = [int, float, complex, object]
        for dtype in valid_dtypes:
            x = np.arange(5, dtype=dtype)
            result = np.positive(x)
            assert_equal(x, result, err_msg=str(dtype)) 
Example 19
Project: Mastering-Elasticsearch-7.0   Author: PacktPublishing   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_invalid(self):
        with assert_raises(TypeError):
            np.positive(True)
        with assert_raises(TypeError):
            np.positive(np.datetime64('2000-01-01'))
        with assert_raises(TypeError):
            np.positive(np.array(['foo'], dtype=str))
        with assert_raises(TypeError):
            np.positive(np.array(['bar'], dtype=object)) 
Example 20
Project: Mastering-Elasticsearch-7.0   Author: PacktPublishing   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_pos_nan():
    """Check np.nan is a positive nan."""
    assert_(np.signbit(np.nan) == 0) 
Example 21
Project: trax   Author: google   File: math_ops.py    License: Apache License 2.0 5 votes vote down vote up
def positive(x):
  return _scalar(lambda x: x, x) 
Example 22
Project: GraphicDesignPatternByPython   Author: Relph1119   File: test_datetime.py    License: MIT License 5 votes vote down vote up
def test_datetime_unary(self):
        for tda, tdb, tdzero, tdone, tdmone in \
                [
                 # One-dimensional arrays
                 (np.array([3], dtype='m8[D]'),
                  np.array([-3], dtype='m8[D]'),
                  np.array([0], dtype='m8[D]'),
                  np.array([1], dtype='m8[D]'),
                  np.array([-1], dtype='m8[D]')),
                 # NumPy scalars
                 (np.timedelta64(3, '[D]'),
                  np.timedelta64(-3, '[D]'),
                  np.timedelta64(0, '[D]'),
                  np.timedelta64(1, '[D]'),
                  np.timedelta64(-1, '[D]'))]:
            # negative ufunc
            assert_equal(-tdb, tda)
            assert_equal((-tdb).dtype, tda.dtype)
            assert_equal(np.negative(tdb), tda)
            assert_equal(np.negative(tdb).dtype, tda.dtype)

            # positive ufunc
            assert_equal(np.positive(tda), tda)
            assert_equal(np.positive(tda).dtype, tda.dtype)
            assert_equal(np.positive(tdb), tdb)
            assert_equal(np.positive(tdb).dtype, tdb.dtype)

            # absolute ufunc
            assert_equal(np.absolute(tdb), tda)
            assert_equal(np.absolute(tdb).dtype, tda.dtype)

            # sign ufunc
            assert_equal(np.sign(tda), tdone)
            assert_equal(np.sign(tdb), tdmone)
            assert_equal(np.sign(tdzero), tdzero)
            assert_equal(np.sign(tda).dtype, tda.dtype)

            # The ufuncs always produce native-endian results
            assert_ 
Example 23
Project: GraphicDesignPatternByPython   Author: Relph1119   File: test_datetime.py    License: MIT License 5 votes vote down vote up
def test_string_parser_variants(self):
        # Allow space instead of 'T' between date and time
        assert_equal(np.array(['1980-02-29T01:02:03'], np.dtype('M8[s]')),
                     np.array(['1980-02-29 01:02:03'], np.dtype('M8[s]')))
        # Allow positive years
        assert_equal(np.array(['+1980-02-29T01:02:03'], np.dtype('M8[s]')),
                     np.array(['+1980-02-29 01:02:03'], np.dtype('M8[s]')))
        # Allow negative years
        assert_equal(np.array(['-1980-02-29T01:02:03'], np.dtype('M8[s]')),
                     np.array(['-1980-02-29 01:02:03'], np.dtype('M8[s]')))
        # UTC specifier
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['+1980-02-29T01:02:03'], np.dtype('M8[s]')),
                np.array(['+1980-02-29 01:02:03Z'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['-1980-02-29T01:02:03'], np.dtype('M8[s]')),
                np.array(['-1980-02-29 01:02:03Z'], np.dtype('M8[s]')))
        # Time zone offset
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['1980-02-29T02:02:03'], np.dtype('M8[s]')),
                np.array(['1980-02-29 00:32:03-0130'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['1980-02-28T22:32:03'], np.dtype('M8[s]')),
                np.array(['1980-02-29 00:02:03+01:30'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['1980-02-29T02:32:03.506'], np.dtype('M8[s]')),
                np.array(['1980-02-29 00:32:03.506-02'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(np.datetime64('1977-03-02T12:30-0230'),
                         np.datetime64('1977-03-02T15:00')) 
Example 24
Project: GraphicDesignPatternByPython   Author: Relph1119   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_power_zero(self):
        # ticket #1271
        zero = np.array([0j])
        one = np.array([1+0j])
        cnan = np.array([complex(np.nan, np.nan)])
        # FIXME cinf not tested.
        #cinf = np.array([complex(np.inf, 0)])

        def assert_complex_equal(x, y):
            x, y = np.asarray(x), np.asarray(y)
            assert_array_equal(x.real, y.real)
            assert_array_equal(x.imag, y.imag)

        # positive powers
        for p in [0.33, 0.5, 1, 1.5, 2, 3, 4, 5, 6.6]:
            assert_complex_equal(np.power(zero, p), zero)

        # zero power
        assert_complex_equal(np.power(zero, 0), one)
        with np.errstate(invalid="ignore"):
            assert_complex_equal(np.power(zero, 0+1j), cnan)

            # negative power
            for p in [0.33, 0.5, 1, 1.5, 2, 3, 4, 5, 6.6]:
                assert_complex_equal(np.power(zero, -p), cnan)
            assert_complex_equal(np.power(zero, -1+0.2j), cnan) 
Example 25
Project: GraphicDesignPatternByPython   Author: Relph1119   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_exceptions(self):
        a = np.ones(1, dtype=np.bool_)
        assert_raises(TypeError, np.negative, a)
        assert_raises(TypeError, np.positive, a)
        assert_raises(TypeError, np.subtract, a, a) 
Example 26
Project: GraphicDesignPatternByPython   Author: Relph1119   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_invalid(self):
        with assert_raises(TypeError):
            np.positive(True)
        with assert_raises(TypeError):
            np.positive(np.datetime64('2000-01-01'))
        with assert_raises(TypeError):
            np.positive(np.array(['foo'], dtype=str))
        with assert_raises(TypeError):
            np.positive(np.array(['bar'], dtype=object)) 
Example 27
Project: GraphicDesignPatternByPython   Author: Relph1119   File: test_umath.py    License: MIT License 5 votes vote down vote up
def test_pos_nan():
    """Check np.nan is a positive nan."""
    assert_(np.signbit(np.nan) == 0) 
Example 28
def test_datetime_unary(self):
        for tda, tdb, tdzero, tdone, tdmone in \
                [
                 # One-dimensional arrays
                 (np.array([3], dtype='m8[D]'),
                  np.array([-3], dtype='m8[D]'),
                  np.array([0], dtype='m8[D]'),
                  np.array([1], dtype='m8[D]'),
                  np.array([-1], dtype='m8[D]')),
                 # NumPy scalars
                 (np.timedelta64(3, '[D]'),
                  np.timedelta64(-3, '[D]'),
                  np.timedelta64(0, '[D]'),
                  np.timedelta64(1, '[D]'),
                  np.timedelta64(-1, '[D]'))]:
            # negative ufunc
            assert_equal(-tdb, tda)
            assert_equal((-tdb).dtype, tda.dtype)
            assert_equal(np.negative(tdb), tda)
            assert_equal(np.negative(tdb).dtype, tda.dtype)

            # positive ufunc
            assert_equal(np.positive(tda), tda)
            assert_equal(np.positive(tda).dtype, tda.dtype)
            assert_equal(np.positive(tdb), tdb)
            assert_equal(np.positive(tdb).dtype, tdb.dtype)

            # absolute ufunc
            assert_equal(np.absolute(tdb), tda)
            assert_equal(np.absolute(tdb).dtype, tda.dtype)

            # sign ufunc
            assert_equal(np.sign(tda), tdone)
            assert_equal(np.sign(tdb), tdmone)
            assert_equal(np.sign(tdzero), tdzero)
            assert_equal(np.sign(tda).dtype, tda.dtype)

            # The ufuncs always produce native-endian results
            assert_ 
Example 29
def test_string_parser_variants(self):
        # Allow space instead of 'T' between date and time
        assert_equal(np.array(['1980-02-29T01:02:03'], np.dtype('M8[s]')),
                     np.array(['1980-02-29 01:02:03'], np.dtype('M8[s]')))
        # Allow positive years
        assert_equal(np.array(['+1980-02-29T01:02:03'], np.dtype('M8[s]')),
                     np.array(['+1980-02-29 01:02:03'], np.dtype('M8[s]')))
        # Allow negative years
        assert_equal(np.array(['-1980-02-29T01:02:03'], np.dtype('M8[s]')),
                     np.array(['-1980-02-29 01:02:03'], np.dtype('M8[s]')))
        # UTC specifier
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['+1980-02-29T01:02:03'], np.dtype('M8[s]')),
                np.array(['+1980-02-29 01:02:03Z'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['-1980-02-29T01:02:03'], np.dtype('M8[s]')),
                np.array(['-1980-02-29 01:02:03Z'], np.dtype('M8[s]')))
        # Time zone offset
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['1980-02-29T02:02:03'], np.dtype('M8[s]')),
                np.array(['1980-02-29 00:32:03-0130'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['1980-02-28T22:32:03'], np.dtype('M8[s]')),
                np.array(['1980-02-29 00:02:03+01:30'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(
                np.array(['1980-02-29T02:32:03.506'], np.dtype('M8[s]')),
                np.array(['1980-02-29 00:32:03.506-02'], np.dtype('M8[s]')))
        with assert_warns(DeprecationWarning):
            assert_equal(np.datetime64('1977-03-02T12:30-0230'),
                         np.datetime64('1977-03-02T15:00')) 
Example 30
def test_floor_division_signed_zero(self):
        # Check that the sign bit is correctly set when dividing positive and
        # negative zero by one.
        x = np.zeros(10)
        assert_equal(np.signbit(x//1), 0)
        assert_equal(np.signbit((-x)//1), 1)