def test_shift_periods(self):
# GH #22458 : argument 'n' was deprecated in favor of 'periods'
idx = PeriodIndex(freq='A', start='1/1/2001', end='12/1/2009')
tm.assert_index_equal(idx.shift(periods=0), idx)
tm.assert_index_equal(idx.shift(0), idx)
with tm.assert_produces_warning(FutureWarning, check_stacklevel=True):
tm.assert_index_equal(idx.shift(n=0), idx)
def test_shift_periods(self):
# GH #22458 : argument 'n' was deprecated in favor of 'periods'
idx = PeriodIndex(freq='A', start='1/1/2001', end='12/1/2009')
tm.assert_index_equal(idx.shift(periods=0), idx)
tm.assert_index_equal(idx.shift(0), idx)
with tm.assert_produces_warning(FutureWarning,
check_stacklevel=True):
tm.assert_index_equal(idx.shift(n=0), idx)
def test_pi_shift_ndarray(self):
idx = PeriodIndex(['2011-01', '2011-02', 'NaT', '2011-04'],
freq='M', name='idx')
result = idx.shift(np.array([1, 2, 3, 4]))
expected = PeriodIndex(['2011-02', '2011-04', 'NaT', '2011-08'],
freq='M', name='idx')
tm.assert_index_equal(result, expected)
result = idx.shift(np.array([1, -2, 3, -4]))
expected = PeriodIndex(['2011-02', '2010-12', 'NaT', '2010-12'],
freq='M', name='idx')
tm.assert_index_equal(result, expected)
def test_pi_shift_ndarray(self):
idx = PeriodIndex(['2011-01', '2011-02', 'NaT', '2011-04'],
freq='M', name='idx')
result = idx.shift(np.array([1, 2, 3, 4]))
expected = PeriodIndex(['2011-02', '2011-04', 'NaT', '2011-08'],
freq='M', name='idx')
tm.assert_index_equal(result, expected)
result = idx.shift(np.array([1, -2, 3, -4]))
expected = PeriodIndex(['2011-02', '2010-12', 'NaT', '2010-12'],
freq='M', name='idx')
tm.assert_index_equal(result, expected)
def test_pi_shift_ndarray(self):
idx = PeriodIndex(["2011-01", "2011-02", "NaT", "2011-04"],
freq="M",
name="idx")
result = idx.shift(np.array([1, 2, 3, 4]))
expected = PeriodIndex(["2011-02", "2011-04", "NaT", "2011-08"],
freq="M",
name="idx")
tm.assert_index_equal(result, expected)
result = idx.shift(np.array([1, -2, 3, -4]))
expected = PeriodIndex(["2011-02", "2010-12", "NaT", "2010-12"],
freq="M",
name="idx")
tm.assert_index_equal(result, expected)
def test_shift_nat(self):
idx = PeriodIndex(['2011-01', '2011-02', 'NaT',
'2011-04'], freq='M', name='idx')
result = idx.shift(1)
expected = PeriodIndex(['2011-02', '2011-03', 'NaT',
'2011-05'], freq='M', name='idx')
tm.assert_index_equal(result, expected)
assert result.name == expected.name
def test_shift(self):
pi1 = PeriodIndex(freq='A', start='1/1/2001', end='12/1/2009')
pi2 = PeriodIndex(freq='A', start='1/1/2002', end='12/1/2010')
tm.assert_index_equal(pi1.shift(0), pi1)
assert len(pi1) == len(pi2)
tm.assert_index_equal(pi1.shift(1), pi2)
pi1 = PeriodIndex(freq='A', start='1/1/2001', end='12/1/2009')
pi2 = PeriodIndex(freq='A', start='1/1/2000', end='12/1/2008')
assert len(pi1) == len(pi2)
tm.assert_index_equal(pi1.shift(-1), pi2)
pi1 = PeriodIndex(freq='M', start='1/1/2001', end='12/1/2009')
pi2 = PeriodIndex(freq='M', start='2/1/2001', end='1/1/2010')
assert len(pi1) == len(pi2)
tm.assert_index_equal(pi1.shift(1), pi2)
pi1 = PeriodIndex(freq='M', start='1/1/2001', end='12/1/2009')
pi2 = PeriodIndex(freq='M', start='12/1/2000', end='11/1/2009')
assert len(pi1) == len(pi2)
tm.assert_index_equal(pi1.shift(-1), pi2)
pi1 = PeriodIndex(freq='D', start='1/1/2001', end='12/1/2009')
pi2 = PeriodIndex(freq='D', start='1/2/2001', end='12/2/2009')
assert len(pi1) == len(pi2)
tm.assert_index_equal(pi1.shift(1), pi2)
pi1 = PeriodIndex(freq='D', start='1/1/2001', end='12/1/2009')
pi2 = PeriodIndex(freq='D', start='12/31/2000', end='11/30/2009')
assert len(pi1) == len(pi2)
tm.assert_index_equal(pi1.shift(-1), pi2)
def test_shift(self):
pi1 = PeriodIndex(freq='A', start='1/1/2001', end='12/1/2009')
pi2 = PeriodIndex(freq='A', start='1/1/2002', end='12/1/2010')
tm.assert_index_equal(pi1.shift(0), pi1)
assert len(pi1) == len(pi2)
tm.assert_index_equal(pi1.shift(1), pi2)
pi1 = PeriodIndex(freq='A', start='1/1/2001', end='12/1/2009')
pi2 = PeriodIndex(freq='A', start='1/1/2000', end='12/1/2008')
assert len(pi1) == len(pi2)
tm.assert_index_equal(pi1.shift(-1), pi2)
pi1 = PeriodIndex(freq='M', start='1/1/2001', end='12/1/2009')
pi2 = PeriodIndex(freq='M', start='2/1/2001', end='1/1/2010')
assert len(pi1) == len(pi2)
tm.assert_index_equal(pi1.shift(1), pi2)
pi1 = PeriodIndex(freq='M', start='1/1/2001', end='12/1/2009')
pi2 = PeriodIndex(freq='M', start='12/1/2000', end='11/1/2009')
assert len(pi1) == len(pi2)
tm.assert_index_equal(pi1.shift(-1), pi2)
pi1 = PeriodIndex(freq='D', start='1/1/2001', end='12/1/2009')
pi2 = PeriodIndex(freq='D', start='1/2/2001', end='12/2/2009')
assert len(pi1) == len(pi2)
tm.assert_index_equal(pi1.shift(1), pi2)
pi1 = PeriodIndex(freq='D', start='1/1/2001', end='12/1/2009')
pi2 = PeriodIndex(freq='D', start='12/31/2000', end='11/30/2009')
assert len(pi1) == len(pi2)
tm.assert_index_equal(pi1.shift(-1), pi2)
def test_shift_nat(self):
idx = PeriodIndex(["2011-01", "2011-02", "NaT", "2011-04"],
freq="M",
name="idx")
result = idx.shift(1)
expected = PeriodIndex(["2011-02", "2011-03", "NaT", "2011-05"],
freq="M",
name="idx")
tm.assert_index_equal(result, expected)
assert result.name == expected.name
def test_shift_corner_cases(self):
# GH#9903
idx = PeriodIndex([], name="xxx", freq="H")
msg = "`freq` argument is not supported for PeriodArray._time_shift"
with pytest.raises(TypeError, match=msg):
# period shift doesn't accept freq
idx.shift(1, freq="H")
tm.assert_index_equal(idx.shift(0), idx)
tm.assert_index_equal(idx.shift(3), idx)
idx = PeriodIndex(
["2011-01-01 10:00", "2011-01-01 11:00", "2011-01-01 12:00"],
name="xxx",
freq="H",
)
tm.assert_index_equal(idx.shift(0), idx)
exp = PeriodIndex(
["2011-01-01 13:00", "2011-01-01 14:00", "2011-01-01 15:00"],
name="xxx",
freq="H",
)
tm.assert_index_equal(idx.shift(3), exp)
exp = PeriodIndex(
["2011-01-01 07:00", "2011-01-01 08:00", "2011-01-01 09:00"],
name="xxx",
freq="H",
)
tm.assert_index_equal(idx.shift(-3), exp)
def test_shift_corner_cases(self):
# GH#9903
idx = PeriodIndex([], name="xxx", freq="H")
with pytest.raises(TypeError):
# period shift doesn't accept freq
idx.shift(1, freq="H")
tm.assert_index_equal(idx.shift(0), idx)
tm.assert_index_equal(idx.shift(3), idx)
idx = PeriodIndex(
["2011-01-01 10:00", "2011-01-01 11:00", "2011-01-01 12:00"],
name="xxx",
freq="H",
)
tm.assert_index_equal(idx.shift(0), idx)
exp = PeriodIndex(
["2011-01-01 13:00", "2011-01-01 14:00", "2011-01-01 15:00"],
name="xxx",
freq="H",
)
tm.assert_index_equal(idx.shift(3), exp)
exp = PeriodIndex(
["2011-01-01 07:00", "2011-01-01 08:00", "2011-01-01 09:00"],
name="xxx",
freq="H",
)
tm.assert_index_equal(idx.shift(-3), exp)
