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"""
test date_range, bdate_range construction from the convenience range functions
"""
import pytest
import numpy as np
from pytz import timezone
from datetime import datetime, timedelta, time
import pandas as pd
import pandas.util.testing as tm
from pandas import compat
from pandas import date_range, bdate_range, offsets, DatetimeIndex, Timestamp
from pandas.tseries.offsets import (generate_range, CDay, BDay, DateOffset,
MonthEnd, prefix_mapping)
from pandas.tests.series.common import TestData
START, END = datetime(2009, 1, 1), datetime(2010, 1, 1)
class TestDateRanges(TestData):
def test_date_range_gen_error(self):
rng = date_range('1/1/2000 00:00', '1/1/2000 00:18', freq='5min')
assert len(rng) == 4
@pytest.mark.parametrize("freq", ["AS", "YS"])
def test_begin_year_alias(self, freq):
# see gh-9313
rng = date_range("1/1/2013", "7/1/2017", freq=freq)
exp = pd.DatetimeIndex(["2013-01-01", "2014-01-01",
"2015-01-01", "2016-01-01",
"2017-01-01"], freq=freq)
tm.assert_index_equal(rng, exp)
@pytest.mark.parametrize("freq", ["A", "Y"])
def test_end_year_alias(self, freq):
# see gh-9313
rng = date_range("1/1/2013", "7/1/2017", freq=freq)
exp = pd.DatetimeIndex(["2013-12-31", "2014-12-31",
"2015-12-31", "2016-12-31"], freq=freq)
tm.assert_index_equal(rng, exp)
@pytest.mark.parametrize("freq", ["BA", "BY"])
def test_business_end_year_alias(self, freq):
# see gh-9313
rng = date_range("1/1/2013", "7/1/2017", freq=freq)
exp = pd.DatetimeIndex(["2013-12-31", "2014-12-31",
"2015-12-31", "2016-12-30"], freq=freq)
tm.assert_index_equal(rng, exp)
def test_date_range_negative_freq(self):
# GH 11018
rng = date_range('2011-12-31', freq='-2A', periods=3)
exp = pd.DatetimeIndex(['2011-12-31', '2009-12-31',
'2007-12-31'], freq='-2A')
tm.assert_index_equal(rng, exp)
assert rng.freq == '-2A'
rng = date_range('2011-01-31', freq='-2M', periods=3)
exp = pd.DatetimeIndex(['2011-01-31', '2010-11-30',
'2010-09-30'], freq='-2M')
tm.assert_index_equal(rng, exp)
assert rng.freq == '-2M'
def test_date_range_bms_bug(self):
# #1645
rng = date_range('1/1/2000', periods=10, freq='BMS')
ex_first = Timestamp('2000-01-03')
assert rng[0] == ex_first
def test_date_range_normalize(self):
snap = datetime.today()
n = 50
rng = date_range(snap, periods=n, normalize=False, freq='2D')
offset = timedelta(2)
values = DatetimeIndex([snap + i * offset for i in range(n)])
tm.assert_index_equal(rng, values)
rng = date_range('1/1/2000 08:15', periods=n, normalize=False,
freq='B')
the_time = time(8, 15)
for val in rng:
assert val.time() == the_time
def test_date_range_fy5252(self):
dr = date_range(start="2013-01-01", periods=2, freq=offsets.FY5253(
startingMonth=1, weekday=3, variation="nearest"))
assert dr[0] == Timestamp('2013-01-31')
assert dr[1] == Timestamp('2014-01-30')
def test_date_range_ambiguous_arguments(self):
# #2538
start = datetime(2011, 1, 1, 5, 3, 40)
end = datetime(2011, 1, 1, 8, 9, 40)
msg = ('Of the three parameters: start, end, and periods, '
'exactly two must be specified')
with tm.assert_raises_regex(ValueError, msg):
date_range(start, end, periods=10, freq='s')
def test_date_range_businesshour(self):
idx = DatetimeIndex(['2014-07-04 09:00', '2014-07-04 10:00',
'2014-07-04 11:00',
'2014-07-04 12:00', '2014-07-04 13:00',
'2014-07-04 14:00',
'2014-07-04 15:00', '2014-07-04 16:00'],
freq='BH')
rng = date_range('2014-07-04 09:00', '2014-07-04 16:00', freq='BH')
tm.assert_index_equal(idx, rng)
idx = DatetimeIndex(
['2014-07-04 16:00', '2014-07-07 09:00'], freq='BH')
rng = date_range('2014-07-04 16:00', '2014-07-07 09:00', freq='BH')
tm.assert_index_equal(idx, rng)
idx = DatetimeIndex(['2014-07-04 09:00', '2014-07-04 10:00',
'2014-07-04 11:00',
'2014-07-04 12:00', '2014-07-04 13:00',
'2014-07-04 14:00',
'2014-07-04 15:00', '2014-07-04 16:00',
'2014-07-07 09:00', '2014-07-07 10:00',
'2014-07-07 11:00',
'2014-07-07 12:00', '2014-07-07 13:00',
'2014-07-07 14:00',
'2014-07-07 15:00', '2014-07-07 16:00',
'2014-07-08 09:00', '2014-07-08 10:00',
'2014-07-08 11:00',
'2014-07-08 12:00', '2014-07-08 13:00',
'2014-07-08 14:00',
'2014-07-08 15:00', '2014-07-08 16:00'],
freq='BH')
rng = date_range('2014-07-04 09:00', '2014-07-08 16:00', freq='BH')
tm.assert_index_equal(idx, rng)
def test_range_misspecified(self):
# GH #1095
msg = ('Of the three parameters: start, end, and periods, '
'exactly two must be specified')
with tm.assert_raises_regex(ValueError, msg):
date_range(start='1/1/2000')
with tm.assert_raises_regex(ValueError, msg):
date_range(end='1/1/2000')
with tm.assert_raises_regex(ValueError, msg):
date_range(periods=10)
with tm.assert_raises_regex(ValueError, msg):
date_range(start='1/1/2000', freq='H')
with tm.assert_raises_regex(ValueError, msg):
date_range(end='1/1/2000', freq='H')
with tm.assert_raises_regex(ValueError, msg):
date_range(periods=10, freq='H')
with tm.assert_raises_regex(ValueError, msg):
date_range()
def test_compat_replace(self):
# https://github.com/statsmodels/statsmodels/issues/3349
# replace should take ints/longs for compat
for f in [compat.long, int]:
result = date_range(Timestamp('1960-04-01 00:00:00',
freq='QS-JAN'),
periods=f(76),
freq='QS-JAN')
assert len(result) == 76
def test_catch_infinite_loop(self):
offset = offsets.DateOffset(minute=5)
# blow up, don't loop forever
pytest.raises(Exception, date_range, datetime(2011, 11, 11),
datetime(2011, 11, 12), freq=offset)
class TestGenRangeGeneration(object):
def test_generate(self):
rng1 = list(generate_range(START, END, offset=BDay()))
rng2 = list(generate_range(START, END, time_rule='B'))
assert rng1 == rng2
def test_generate_cday(self):
rng1 = list(generate_range(START, END, offset=CDay()))
rng2 = list(generate_range(START, END, time_rule='C'))
assert rng1 == rng2
def test_1(self):
rng = list(generate_range(start=datetime(2009, 3, 25), periods=2))
expected = [datetime(2009, 3, 25), datetime(2009, 3, 26)]
assert rng == expected
def test_2(self):
rng = list(generate_range(start=datetime(2008, 1, 1),
end=datetime(2008, 1, 3)))
expected = [datetime(2008, 1, 1),
datetime(2008, 1, 2),
datetime(2008, 1, 3)]
assert rng == expected
def test_3(self):
rng = list(generate_range(start=datetime(2008, 1, 5),
end=datetime(2008, 1, 6)))
expected = []
assert rng == expected
def test_precision_finer_than_offset(self):
# GH 9907
result1 = DatetimeIndex(start='2015-04-15 00:00:03',
end='2016-04-22 00:00:00', freq='Q')
result2 = DatetimeIndex(start='2015-04-15 00:00:03',
end='2015-06-22 00:00:04', freq='W')
expected1_list = ['2015-06-30 00:00:03', '2015-09-30 00:00:03',
'2015-12-31 00:00:03', '2016-03-31 00:00:03']
expected2_list = ['2015-04-19 00:00:03', '2015-04-26 00:00:03',
'2015-05-03 00:00:03', '2015-05-10 00:00:03',
'2015-05-17 00:00:03', '2015-05-24 00:00:03',
'2015-05-31 00:00:03', '2015-06-07 00:00:03',
'2015-06-14 00:00:03', '2015-06-21 00:00:03']
expected1 = DatetimeIndex(expected1_list, dtype='datetime64[ns]',
freq='Q-DEC', tz=None)
expected2 = DatetimeIndex(expected2_list, dtype='datetime64[ns]',
freq='W-SUN', tz=None)
tm.assert_index_equal(result1, expected1)
tm.assert_index_equal(result2, expected2)
dt1, dt2 = '2017-01-01', '2017-01-01'
tz1, tz2 = 'US/Eastern', 'Europe/London'
@pytest.mark.parametrize("start,end", [
(pd.Timestamp(dt1, tz=tz1), pd.Timestamp(dt2)),
(pd.Timestamp(dt1), pd.Timestamp(dt2, tz=tz2)),
(pd.Timestamp(dt1, tz=tz1), pd.Timestamp(dt2, tz=tz2)),
(pd.Timestamp(dt1, tz=tz2), pd.Timestamp(dt2, tz=tz1))
])
def test_mismatching_tz_raises_err(self, start, end):
# issue 18488
with pytest.raises(TypeError):
pd.date_range(start, end)
with pytest.raises(TypeError):
pd.DatetimeIndex(start, end, freq=BDay())
class TestBusinessDateRange(object):
def test_constructor(self):
bdate_range(START, END, freq=BDay())
bdate_range(START, periods=20, freq=BDay())
bdate_range(end=START, periods=20, freq=BDay())
msg = 'periods must be a number, got B'
with tm.assert_raises_regex(TypeError, msg):
date_range('2011-1-1', '2012-1-1', 'B')
with tm.assert_raises_regex(TypeError, msg):
bdate_range('2011-1-1', '2012-1-1', 'B')
def test_naive_aware_conflicts(self):
naive = bdate_range(START, END, freq=BDay(), tz=None)
aware = bdate_range(START, END, freq=BDay(), tz="Asia/Hong_Kong")
msg = 'tz-naive.*tz-aware'
with tm.assert_raises_regex(TypeError, msg):
naive.join(aware)
with tm.assert_raises_regex(TypeError, msg):
aware.join(naive)
def test_cached_range(self):
DatetimeIndex._cached_range(START, END, offset=BDay())
DatetimeIndex._cached_range(START, periods=20, offset=BDay())
DatetimeIndex._cached_range(end=START, periods=20, offset=BDay())
with tm.assert_raises_regex(TypeError, "offset"):
DatetimeIndex._cached_range(START, END)
with tm.assert_raises_regex(TypeError, "specify period"):
DatetimeIndex._cached_range(START, offset=BDay())
with tm.assert_raises_regex(TypeError, "specify period"):
DatetimeIndex._cached_range(end=END, offset=BDay())
with tm.assert_raises_regex(TypeError, "start or end"):
DatetimeIndex._cached_range(periods=20, offset=BDay())
def test_cached_range_bug(self):
rng = date_range('2010-09-01 05:00:00', periods=50,
freq=DateOffset(hours=6))
assert len(rng) == 50
assert rng[0] == datetime(2010, 9, 1, 5)
def test_timezone_comparaison_bug(self):
# smoke test
start = Timestamp('20130220 10:00', tz='US/Eastern')
result = date_range(start, periods=2, tz='US/Eastern')
assert len(result) == 2
def test_timezone_comparaison_assert(self):
start = Timestamp('20130220 10:00', tz='US/Eastern')
msg = 'Inferred time zone not equal to passed time zone'
with tm.assert_raises_regex(AssertionError, msg):
date_range(start, periods=2, tz='Europe/Berlin')
def test_misc(self):
end = datetime(2009, 5, 13)
dr = bdate_range(end=end, periods=20)
firstDate = end - 19 * BDay()
assert len(dr) == 20
assert dr[0] == firstDate
assert dr[-1] == end
def test_date_parse_failure(self):
badly_formed_date = '2007/100/1'
with pytest.raises(ValueError):
Timestamp(badly_formed_date)
with pytest.raises(ValueError):
bdate_range(start=badly_formed_date, periods=10)
with pytest.raises(ValueError):
bdate_range(end=badly_formed_date, periods=10)
with pytest.raises(ValueError):
bdate_range(badly_formed_date, badly_formed_date)
def test_daterange_bug_456(self):
# GH #456
rng1 = bdate_range('12/5/2011', '12/5/2011')
rng2 = bdate_range('12/2/2011', '12/5/2011')
rng2.offset = BDay()
result = rng1.union(rng2)
assert isinstance(result, DatetimeIndex)
def test_error_with_zero_monthends(self):
msg = 'Offset <0 \* MonthEnds> did not increment date'
with tm.assert_raises_regex(ValueError, msg):
date_range('1/1/2000', '1/1/2001', freq=MonthEnd(0))
def test_range_bug(self):
# GH #770
offset = DateOffset(months=3)
result = date_range("2011-1-1", "2012-1-31", freq=offset)
start = datetime(2011, 1, 1)
expected = DatetimeIndex([start + i * offset for i in range(5)])
tm.assert_index_equal(result, expected)
def test_range_tz_pytz(self):
# see gh-2906
tz = timezone('US/Eastern')
start = tz.localize(datetime(2011, 1, 1))
end = tz.localize(datetime(2011, 1, 3))
dr = date_range(start=start, periods=3)
assert dr.tz.zone == tz.zone
assert dr[0] == start
assert dr[2] == end
dr = date_range(end=end, periods=3)
assert dr.tz.zone == tz.zone
assert dr[0] == start
assert dr[2] == end
dr = date_range(start=start, end=end)
assert dr.tz.zone == tz.zone
assert dr[0] == start
assert dr[2] == end
def test_range_tz_dst_straddle_pytz(self):
tz = timezone('US/Eastern')
dates = [(tz.localize(datetime(2014, 3, 6)),
tz.localize(datetime(2014, 3, 12))),
(tz.localize(datetime(2013, 11, 1)),
tz.localize(datetime(2013, 11, 6)))]
for (start, end) in dates:
dr = date_range(start, end, freq='D')
assert dr[0] == start
assert dr[-1] == end
assert np.all(dr.hour == 0)
dr = date_range(start, end, freq='D', tz='US/Eastern')
assert dr[0] == start
assert dr[-1] == end
assert np.all(dr.hour == 0)
dr = date_range(start.replace(tzinfo=None), end.replace(
tzinfo=None), freq='D', tz='US/Eastern')
assert dr[0] == start
assert dr[-1] == end
assert np.all(dr.hour == 0)
def test_range_tz_dateutil(self):
# see gh-2906
# Use maybe_get_tz to fix filename in tz under dateutil.
from pandas._libs.tslibs.timezones import maybe_get_tz
tz = lambda x: maybe_get_tz('dateutil/' + x)
start = datetime(2011, 1, 1, tzinfo=tz('US/Eastern'))
end = datetime(2011, 1, 3, tzinfo=tz('US/Eastern'))
dr = date_range(start=start, periods=3)
assert dr.tz == tz('US/Eastern')
assert dr[0] == start
assert dr[2] == end
dr = date_range(end=end, periods=3)
assert dr.tz == tz('US/Eastern')
assert dr[0] == start
assert dr[2] == end
dr = date_range(start=start, end=end)
assert dr.tz == tz('US/Eastern')
assert dr[0] == start
assert dr[2] == end
def test_range_closed(self):
begin = datetime(2011, 1, 1)
end = datetime(2014, 1, 1)
for freq in ["1D", "3D", "2M", "7W", "3H", "A"]:
closed = date_range(begin, end, closed=None, freq=freq)
left = date_range(begin, end, closed="left", freq=freq)
right = date_range(begin, end, closed="right", freq=freq)
expected_left = left
expected_right = right
if end == closed[-1]:
expected_left = closed[:-1]
if begin == closed[0]:
expected_right = closed[1:]
tm.assert_index_equal(expected_left, left)
tm.assert_index_equal(expected_right, right)
def test_range_closed_with_tz_aware_start_end(self):
# GH12409, GH12684
begin = Timestamp('2011/1/1', tz='US/Eastern')
end = Timestamp('2014/1/1', tz='US/Eastern')
for freq in ["1D", "3D", "2M", "7W", "3H", "A"]:
closed = date_range(begin, end, closed=None, freq=freq)
left = date_range(begin, end, closed="left", freq=freq)
right = date_range(begin, end, closed="right", freq=freq)
expected_left = left
expected_right = right
if end == closed[-1]:
expected_left = closed[:-1]
if begin == closed[0]:
expected_right = closed[1:]
tm.assert_index_equal(expected_left, left)
tm.assert_index_equal(expected_right, right)
begin = Timestamp('2011/1/1')
end = Timestamp('2014/1/1')
begintz = Timestamp('2011/1/1', tz='US/Eastern')
endtz = Timestamp('2014/1/1', tz='US/Eastern')
for freq in ["1D", "3D", "2M", "7W", "3H", "A"]:
closed = date_range(begin, end, closed=None, freq=freq,
tz='US/Eastern')
left = date_range(begin, end, closed="left", freq=freq,
tz='US/Eastern')
right = date_range(begin, end, closed="right", freq=freq,
tz='US/Eastern')
expected_left = left
expected_right = right
if endtz == closed[-1]:
expected_left = closed[:-1]
if begintz == closed[0]:
expected_right = closed[1:]
tm.assert_index_equal(expected_left, left)
tm.assert_index_equal(expected_right, right)
def test_range_closed_boundary(self):
# GH 11804
for closed in ['right', 'left', None]:
right_boundary = date_range('2015-09-12', '2015-12-01',
freq='QS-MAR', closed=closed)
left_boundary = date_range('2015-09-01', '2015-09-12',
freq='QS-MAR', closed=closed)
both_boundary = date_range('2015-09-01', '2015-12-01',
freq='QS-MAR', closed=closed)
expected_right = expected_left = expected_both = both_boundary
if closed == 'right':
expected_left = both_boundary[1:]
if closed == 'left':
expected_right = both_boundary[:-1]
if closed is None:
expected_right = both_boundary[1:]
expected_left = both_boundary[:-1]
tm.assert_index_equal(right_boundary, expected_right)
tm.assert_index_equal(left_boundary, expected_left)
tm.assert_index_equal(both_boundary, expected_both)
def test_years_only(self):
# GH 6961
dr = date_range('2014', '2015', freq='M')
assert dr[0] == datetime(2014, 1, 31)
assert dr[-1] == datetime(2014, 12, 31)
def test_freq_divides_end_in_nanos(self):
# GH 10885
result_1 = date_range('2005-01-12 10:00', '2005-01-12 16:00',
freq='345min')
result_2 = date_range('2005-01-13 10:00', '2005-01-13 16:00',
freq='345min')
expected_1 = DatetimeIndex(['2005-01-12 10:00:00',
'2005-01-12 15:45:00'],
dtype='datetime64[ns]', freq='345T',
tz=None)
expected_2 = DatetimeIndex(['2005-01-13 10:00:00',
'2005-01-13 15:45:00'],
dtype='datetime64[ns]', freq='345T',
tz=None)
tm.assert_index_equal(result_1, expected_1)
tm.assert_index_equal(result_2, expected_2)
class TestCustomDateRange(object):
def test_constructor(self):
bdate_range(START, END, freq=CDay())
bdate_range(START, periods=20, freq=CDay())
bdate_range(end=START, periods=20, freq=CDay())
msg = 'periods must be a number, got C'
with tm.assert_raises_regex(TypeError, msg):
date_range('2011-1-1', '2012-1-1', 'C')
with tm.assert_raises_regex(TypeError, msg):
bdate_range('2011-1-1', '2012-1-1', 'C')
def test_cached_range(self):
DatetimeIndex._cached_range(START, END, offset=CDay())
DatetimeIndex._cached_range(START, periods=20,
offset=CDay())
DatetimeIndex._cached_range(end=START, periods=20,
offset=CDay())
# with pytest.raises(TypeError):
with tm.assert_raises_regex(TypeError, "offset"):
DatetimeIndex._cached_range(START, END)
# with pytest.raises(TypeError):
with tm.assert_raises_regex(TypeError, "specify period"):
DatetimeIndex._cached_range(START, offset=CDay())
# with pytest.raises(TypeError):
with tm.assert_raises_regex(TypeError, "specify period"):
DatetimeIndex._cached_range(end=END, offset=CDay())
# with pytest.raises(TypeError):
with tm.assert_raises_regex(TypeError, "start or end"):
DatetimeIndex._cached_range(periods=20, offset=CDay())
def test_misc(self):
end = datetime(2009, 5, 13)
dr = bdate_range(end=end, periods=20, freq='C')
firstDate = end - 19 * CDay()
assert len(dr) == 20
assert dr[0] == firstDate
assert dr[-1] == end
def test_daterange_bug_456(self):
# GH #456
rng1 = bdate_range('12/5/2011', '12/5/2011', freq='C')
rng2 = bdate_range('12/2/2011', '12/5/2011', freq='C')
rng2.offset = CDay()
result = rng1.union(rng2)
assert isinstance(result, DatetimeIndex)
def test_cdaterange(self):
result = bdate_range('2013-05-01', periods=3, freq='C')
expected = DatetimeIndex(['2013-05-01', '2013-05-02', '2013-05-03'])
tm.assert_index_equal(result, expected)
def test_cdaterange_weekmask(self):
result = bdate_range('2013-05-01', periods=3, freq='C',
weekmask='Sun Mon Tue Wed Thu')
expected = DatetimeIndex(['2013-05-01', '2013-05-02', '2013-05-05'])
tm.assert_index_equal(result, expected)
# raise with non-custom freq
msg = ('a custom frequency string is required when holidays or '
'weekmask are passed, got frequency B')
with tm.assert_raises_regex(ValueError, msg):
bdate_range('2013-05-01', periods=3,
weekmask='Sun Mon Tue Wed Thu')
def test_cdaterange_holidays(self):
result = bdate_range('2013-05-01', periods=3, freq='C',
holidays=['2013-05-01'])
expected = DatetimeIndex(['2013-05-02', '2013-05-03', '2013-05-06'])
tm.assert_index_equal(result, expected)
# raise with non-custom freq
msg = ('a custom frequency string is required when holidays or '
'weekmask are passed, got frequency B')
with tm.assert_raises_regex(ValueError, msg):
bdate_range('2013-05-01', periods=3, holidays=['2013-05-01'])
def test_cdaterange_weekmask_and_holidays(self):
result = bdate_range('2013-05-01', periods=3, freq='C',
weekmask='Sun Mon Tue Wed Thu',
holidays=['2013-05-01'])
expected = DatetimeIndex(['2013-05-02', '2013-05-05', '2013-05-06'])
tm.assert_index_equal(result, expected)
# raise with non-custom freq
msg = ('a custom frequency string is required when holidays or '
'weekmask are passed, got frequency B')
with tm.assert_raises_regex(ValueError, msg):
bdate_range('2013-05-01', periods=3,
weekmask='Sun Mon Tue Wed Thu',
holidays=['2013-05-01'])
@pytest.mark.parametrize('freq', [freq for freq in prefix_mapping
if freq.startswith('C')])
def test_all_custom_freq(self, freq):
# should not raise
bdate_range(START, END, freq=freq, weekmask='Mon Wed Fri',
holidays=['2009-03-14'])
bad_freq = freq + 'FOO'
msg = 'invalid custom frequency string: {freq}'
with tm.assert_raises_regex(ValueError, msg.format(freq=bad_freq)):
bdate_range(START, END, freq=bad_freq)