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test_replace.py
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test_replace.py
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from datetime import datetime
from dateutil.tz import gettz
import numpy as np
import pytest
import pytz
from pandas._libs.tslibs import (
OutOfBoundsDatetime,
Timestamp,
conversion,
)
from pandas._libs.tslibs.dtypes import NpyDatetimeUnit
import pandas.util._test_decorators as td
import pandas._testing as tm
class TestTimestampReplace:
def test_replace_out_of_pydatetime_bounds(self):
# GH#50348
ts = Timestamp("2016-01-01").as_unit("ns")
msg = "Out of bounds timestamp: 99999-01-01 00:00:00 with frequency 'ns'"
with pytest.raises(OutOfBoundsDatetime, match=msg):
ts.replace(year=99_999)
ts = ts.as_unit("ms")
result = ts.replace(year=99_999)
assert result.year == 99_999
assert result._value == Timestamp(np.datetime64("99999-01-01", "ms"))._value
def test_replace_non_nano(self):
ts = Timestamp._from_value_and_reso(
91514880000000000, NpyDatetimeUnit.NPY_FR_us.value, None
)
assert ts.to_pydatetime() == datetime(4869, 12, 28)
result = ts.replace(year=4900)
assert result._creso == ts._creso
assert result.to_pydatetime() == datetime(4900, 12, 28)
def test_replace_naive(self):
# GH#14621, GH#7825
ts = Timestamp("2016-01-01 09:00:00")
result = ts.replace(hour=0)
expected = Timestamp("2016-01-01 00:00:00")
assert result == expected
def test_replace_aware(self, tz_aware_fixture):
tz = tz_aware_fixture
# GH#14621, GH#7825
# replacing datetime components with and w/o presence of a timezone
ts = Timestamp("2016-01-01 09:00:00", tz=tz)
result = ts.replace(hour=0)
expected = Timestamp("2016-01-01 00:00:00", tz=tz)
assert result == expected
def test_replace_preserves_nanos(self, tz_aware_fixture):
tz = tz_aware_fixture
# GH#14621, GH#7825
ts = Timestamp("2016-01-01 09:00:00.000000123", tz=tz)
result = ts.replace(hour=0)
expected = Timestamp("2016-01-01 00:00:00.000000123", tz=tz)
assert result == expected
def test_replace_multiple(self, tz_aware_fixture):
tz = tz_aware_fixture
# GH#14621, GH#7825
# replacing datetime components with and w/o presence of a timezone
# test all
ts = Timestamp("2016-01-01 09:00:00.000000123", tz=tz)
result = ts.replace(
year=2015,
month=2,
day=2,
hour=0,
minute=5,
second=5,
microsecond=5,
nanosecond=5,
)
expected = Timestamp("2015-02-02 00:05:05.000005005", tz=tz)
assert result == expected
def test_replace_invalid_kwarg(self, tz_aware_fixture):
tz = tz_aware_fixture
# GH#14621, GH#7825
ts = Timestamp("2016-01-01 09:00:00.000000123", tz=tz)
msg = r"replace\(\) got an unexpected keyword argument"
with pytest.raises(TypeError, match=msg):
ts.replace(foo=5)
def test_replace_integer_args(self, tz_aware_fixture):
tz = tz_aware_fixture
# GH#14621, GH#7825
ts = Timestamp("2016-01-01 09:00:00.000000123", tz=tz)
msg = "value must be an integer, received <class 'float'> for hour"
with pytest.raises(ValueError, match=msg):
ts.replace(hour=0.1)
def test_replace_tzinfo_equiv_tz_localize_none(self):
# GH#14621, GH#7825
# assert conversion to naive is the same as replacing tzinfo with None
ts = Timestamp("2013-11-03 01:59:59.999999-0400", tz="US/Eastern")
assert ts.tz_localize(None) == ts.replace(tzinfo=None)
@td.skip_if_windows
def test_replace_tzinfo(self):
# GH#15683
dt = datetime(2016, 3, 27, 1)
tzinfo = pytz.timezone("CET").localize(dt, is_dst=False).tzinfo
result_dt = dt.replace(tzinfo=tzinfo)
result_pd = Timestamp(dt).replace(tzinfo=tzinfo)
# datetime.timestamp() converts in the local timezone
with tm.set_timezone("UTC"):
assert result_dt.timestamp() == result_pd.timestamp()
assert result_dt == result_pd
assert result_dt == result_pd.to_pydatetime()
result_dt = dt.replace(tzinfo=tzinfo).replace(tzinfo=None)
result_pd = Timestamp(dt).replace(tzinfo=tzinfo).replace(tzinfo=None)
# datetime.timestamp() converts in the local timezone
with tm.set_timezone("UTC"):
assert result_dt.timestamp() == result_pd.timestamp()
assert result_dt == result_pd
assert result_dt == result_pd.to_pydatetime()
@pytest.mark.parametrize(
"tz, normalize",
[
(pytz.timezone("US/Eastern"), lambda x: x.tzinfo.normalize(x)),
(gettz("US/Eastern"), lambda x: x),
],
)
def test_replace_across_dst(self, tz, normalize):
# GH#18319 check that 1) timezone is correctly normalized and
# 2) that hour is not incorrectly changed by this normalization
ts_naive = Timestamp("2017-12-03 16:03:30")
ts_aware = conversion.localize_pydatetime(ts_naive, tz)
# Preliminary sanity-check
assert ts_aware == normalize(ts_aware)
# Replace across DST boundary
ts2 = ts_aware.replace(month=6)
# Check that `replace` preserves hour literal
assert (ts2.hour, ts2.minute) == (ts_aware.hour, ts_aware.minute)
# Check that post-replace object is appropriately normalized
ts2b = normalize(ts2)
assert ts2 == ts2b
def test_replace_dst_border(self, unit):
# Gh 7825
t = Timestamp("2013-11-3", tz="America/Chicago").as_unit(unit)
result = t.replace(hour=3)
expected = Timestamp("2013-11-3 03:00:00", tz="America/Chicago")
assert result == expected
assert result._creso == getattr(NpyDatetimeUnit, f"NPY_FR_{unit}").value
@pytest.mark.parametrize("fold", [0, 1])
@pytest.mark.parametrize("tz", ["dateutil/Europe/London", "Europe/London"])
def test_replace_dst_fold(self, fold, tz, unit):
# GH 25017
d = datetime(2019, 10, 27, 2, 30)
ts = Timestamp(d, tz=tz).as_unit(unit)
result = ts.replace(hour=1, fold=fold)
expected = Timestamp(datetime(2019, 10, 27, 1, 30)).tz_localize(
tz, ambiguous=not fold
)
assert result == expected
assert result._creso == getattr(NpyDatetimeUnit, f"NPY_FR_{unit}").value
@pytest.mark.parametrize("fold", [0, 1])
def test_replace_preserves_fold(self, fold):
# GH#37610. Check that replace preserves Timestamp fold property
tz = gettz("Europe/Moscow")
ts = Timestamp(
year=2009, month=10, day=25, hour=2, minute=30, fold=fold, tzinfo=tz
)
ts_replaced = ts.replace(second=1)
assert ts_replaced.fold == fold