476 lines
13 KiB
Python
476 lines
13 KiB
Python
"""
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Also test support for datetime64[ns] in Series / DataFrame
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"""
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from datetime import (
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datetime,
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timedelta,
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)
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import re
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from dateutil.tz import (
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gettz,
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tzutc,
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)
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import numpy as np
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import pytest
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import pytz
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from pandas._libs import index as libindex
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import pandas as pd
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from pandas import (
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DataFrame,
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Series,
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Timestamp,
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date_range,
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period_range,
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)
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import pandas._testing as tm
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def test_fancy_getitem():
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dti = date_range(
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freq="WOM-1FRI", start=datetime(2005, 1, 1), end=datetime(2010, 1, 1)
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)
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s = Series(np.arange(len(dti)), index=dti)
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assert s[48] == 48
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assert s["1/2/2009"] == 48
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assert s["2009-1-2"] == 48
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assert s[datetime(2009, 1, 2)] == 48
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assert s[Timestamp(datetime(2009, 1, 2))] == 48
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with pytest.raises(KeyError, match=r"^'2009-1-3'$"):
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s["2009-1-3"]
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tm.assert_series_equal(
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s["3/6/2009":"2009-06-05"], s[datetime(2009, 3, 6) : datetime(2009, 6, 5)]
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)
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def test_fancy_setitem():
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dti = date_range(
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freq="WOM-1FRI", start=datetime(2005, 1, 1), end=datetime(2010, 1, 1)
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)
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s = Series(np.arange(len(dti)), index=dti)
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s[48] = -1
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assert s[48] == -1
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s["1/2/2009"] = -2
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assert s[48] == -2
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s["1/2/2009":"2009-06-05"] = -3
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assert (s[48:54] == -3).all()
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@pytest.mark.parametrize("tz_source", ["pytz", "dateutil"])
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def test_getitem_setitem_datetime_tz(tz_source):
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if tz_source == "pytz":
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tzget = pytz.timezone
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else:
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# handle special case for utc in dateutil
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tzget = lambda x: tzutc() if x == "UTC" else gettz(x)
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N = 50
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# testing with timezone, GH #2785
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rng = date_range("1/1/1990", periods=N, freq="H", tz=tzget("US/Eastern"))
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ts = Series(np.random.randn(N), index=rng)
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# also test Timestamp tz handling, GH #2789
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result = ts.copy()
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result["1990-01-01 09:00:00+00:00"] = 0
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result["1990-01-01 09:00:00+00:00"] = ts[4]
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tm.assert_series_equal(result, ts)
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result = ts.copy()
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result["1990-01-01 03:00:00-06:00"] = 0
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result["1990-01-01 03:00:00-06:00"] = ts[4]
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tm.assert_series_equal(result, ts)
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# repeat with datetimes
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result = ts.copy()
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result[datetime(1990, 1, 1, 9, tzinfo=tzget("UTC"))] = 0
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result[datetime(1990, 1, 1, 9, tzinfo=tzget("UTC"))] = ts[4]
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tm.assert_series_equal(result, ts)
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result = ts.copy()
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dt = Timestamp(1990, 1, 1, 3).tz_localize(tzget("US/Central"))
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dt = dt.to_pydatetime()
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result[dt] = 0
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result[dt] = ts[4]
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tm.assert_series_equal(result, ts)
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def test_getitem_setitem_datetimeindex():
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N = 50
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# testing with timezone, GH #2785
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rng = date_range("1/1/1990", periods=N, freq="H", tz="US/Eastern")
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ts = Series(np.random.randn(N), index=rng)
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result = ts["1990-01-01 04:00:00"]
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expected = ts[4]
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assert result == expected
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result = ts.copy()
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result["1990-01-01 04:00:00"] = 0
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result["1990-01-01 04:00:00"] = ts[4]
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tm.assert_series_equal(result, ts)
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result = ts["1990-01-01 04:00:00":"1990-01-01 07:00:00"]
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expected = ts[4:8]
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tm.assert_series_equal(result, expected)
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result = ts.copy()
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result["1990-01-01 04:00:00":"1990-01-01 07:00:00"] = 0
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result["1990-01-01 04:00:00":"1990-01-01 07:00:00"] = ts[4:8]
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tm.assert_series_equal(result, ts)
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lb = "1990-01-01 04:00:00"
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rb = "1990-01-01 07:00:00"
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# GH#18435 strings get a pass from tzawareness compat
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result = ts[(ts.index >= lb) & (ts.index <= rb)]
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expected = ts[4:8]
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tm.assert_series_equal(result, expected)
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lb = "1990-01-01 04:00:00-0500"
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rb = "1990-01-01 07:00:00-0500"
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result = ts[(ts.index >= lb) & (ts.index <= rb)]
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expected = ts[4:8]
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tm.assert_series_equal(result, expected)
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# But we do not give datetimes a pass on tzawareness compat
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msg = "Cannot compare tz-naive and tz-aware datetime-like objects"
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naive = datetime(1990, 1, 1, 4)
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for key in [naive, Timestamp(naive), np.datetime64(naive, "ns")]:
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with pytest.raises(KeyError, match=re.escape(repr(key))):
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# GH#36148 as of 2.0 we require tzawareness-compat
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ts[key]
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result = ts.copy()
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# GH#36148 as of 2.0 we do not ignore tzawareness mismatch in indexing,
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# so setting it as a new key casts to object rather than matching
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# rng[4]
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result[naive] = ts[4]
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assert result.index.dtype == object
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tm.assert_index_equal(result.index[:-1], rng.astype(object))
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assert result.index[-1] == naive
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msg = "Cannot compare tz-naive and tz-aware datetime-like objects"
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with pytest.raises(TypeError, match=msg):
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# GH#36148 require tzawareness compat as of 2.0
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ts[naive : datetime(1990, 1, 1, 7)]
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result = ts.copy()
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with pytest.raises(TypeError, match=msg):
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# GH#36148 require tzawareness compat as of 2.0
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result[naive : datetime(1990, 1, 1, 7)] = 0
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with pytest.raises(TypeError, match=msg):
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# GH#36148 require tzawareness compat as of 2.0
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result[naive : datetime(1990, 1, 1, 7)] = 99
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# the __setitems__ here failed, so result should still match ts
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tm.assert_series_equal(result, ts)
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lb = naive
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rb = datetime(1990, 1, 1, 7)
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msg = r"Invalid comparison between dtype=datetime64\[ns, US/Eastern\] and datetime"
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with pytest.raises(TypeError, match=msg):
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# tznaive vs tzaware comparison is invalid
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# see GH#18376, GH#18162
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ts[(ts.index >= lb) & (ts.index <= rb)]
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lb = Timestamp(naive).tz_localize(rng.tzinfo)
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rb = Timestamp(datetime(1990, 1, 1, 7)).tz_localize(rng.tzinfo)
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result = ts[(ts.index >= lb) & (ts.index <= rb)]
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expected = ts[4:8]
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tm.assert_series_equal(result, expected)
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result = ts[ts.index[4]]
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expected = ts[4]
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assert result == expected
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result = ts[ts.index[4:8]]
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expected = ts[4:8]
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tm.assert_series_equal(result, expected)
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result = ts.copy()
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result[ts.index[4:8]] = 0
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result.iloc[4:8] = ts.iloc[4:8]
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tm.assert_series_equal(result, ts)
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# also test partial date slicing
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result = ts["1990-01-02"]
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expected = ts[24:48]
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tm.assert_series_equal(result, expected)
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result = ts.copy()
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result["1990-01-02"] = 0
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result["1990-01-02"] = ts[24:48]
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tm.assert_series_equal(result, ts)
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def test_getitem_setitem_periodindex():
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N = 50
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rng = period_range("1/1/1990", periods=N, freq="H")
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ts = Series(np.random.randn(N), index=rng)
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result = ts["1990-01-01 04"]
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expected = ts[4]
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assert result == expected
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result = ts.copy()
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result["1990-01-01 04"] = 0
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result["1990-01-01 04"] = ts[4]
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tm.assert_series_equal(result, ts)
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result = ts["1990-01-01 04":"1990-01-01 07"]
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expected = ts[4:8]
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tm.assert_series_equal(result, expected)
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result = ts.copy()
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result["1990-01-01 04":"1990-01-01 07"] = 0
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result["1990-01-01 04":"1990-01-01 07"] = ts[4:8]
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tm.assert_series_equal(result, ts)
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lb = "1990-01-01 04"
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rb = "1990-01-01 07"
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result = ts[(ts.index >= lb) & (ts.index <= rb)]
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expected = ts[4:8]
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tm.assert_series_equal(result, expected)
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# GH 2782
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result = ts[ts.index[4]]
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expected = ts[4]
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assert result == expected
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result = ts[ts.index[4:8]]
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expected = ts[4:8]
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tm.assert_series_equal(result, expected)
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result = ts.copy()
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result[ts.index[4:8]] = 0
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result.iloc[4:8] = ts.iloc[4:8]
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tm.assert_series_equal(result, ts)
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def test_datetime_indexing():
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index = date_range("1/1/2000", "1/7/2000")
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index = index.repeat(3)
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s = Series(len(index), index=index)
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stamp = Timestamp("1/8/2000")
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with pytest.raises(KeyError, match=re.escape(repr(stamp))):
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s[stamp]
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s[stamp] = 0
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assert s[stamp] == 0
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# not monotonic
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s = Series(len(index), index=index)
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s = s[::-1]
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with pytest.raises(KeyError, match=re.escape(repr(stamp))):
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s[stamp]
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s[stamp] = 0
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assert s[stamp] == 0
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# test duplicates in time series
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def test_indexing_with_duplicate_datetimeindex(
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rand_series_with_duplicate_datetimeindex,
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):
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ts = rand_series_with_duplicate_datetimeindex
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uniques = ts.index.unique()
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for date in uniques:
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result = ts[date]
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mask = ts.index == date
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total = (ts.index == date).sum()
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expected = ts[mask]
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if total > 1:
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tm.assert_series_equal(result, expected)
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else:
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tm.assert_almost_equal(result, expected[0])
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cp = ts.copy()
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cp[date] = 0
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expected = Series(np.where(mask, 0, ts), index=ts.index)
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tm.assert_series_equal(cp, expected)
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key = datetime(2000, 1, 6)
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with pytest.raises(KeyError, match=re.escape(repr(key))):
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ts[key]
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# new index
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ts[datetime(2000, 1, 6)] = 0
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assert ts[datetime(2000, 1, 6)] == 0
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def test_loc_getitem_over_size_cutoff(monkeypatch):
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# #1821
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monkeypatch.setattr(libindex, "_SIZE_CUTOFF", 1000)
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# create large list of non periodic datetime
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dates = []
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sec = timedelta(seconds=1)
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half_sec = timedelta(microseconds=500000)
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d = datetime(2011, 12, 5, 20, 30)
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n = 1100
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for i in range(n):
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dates.append(d)
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dates.append(d + sec)
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dates.append(d + sec + half_sec)
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dates.append(d + sec + sec + half_sec)
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d += 3 * sec
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# duplicate some values in the list
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duplicate_positions = np.random.randint(0, len(dates) - 1, 20)
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for p in duplicate_positions:
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dates[p + 1] = dates[p]
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df = DataFrame(np.random.randn(len(dates), 4), index=dates, columns=list("ABCD"))
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pos = n * 3
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timestamp = df.index[pos]
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assert timestamp in df.index
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# it works!
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df.loc[timestamp]
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assert len(df.loc[[timestamp]]) > 0
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def test_indexing_over_size_cutoff_period_index(monkeypatch):
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# GH 27136
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monkeypatch.setattr(libindex, "_SIZE_CUTOFF", 1000)
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n = 1100
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idx = period_range("1/1/2000", freq="T", periods=n)
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assert idx._engine.over_size_threshold
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s = Series(np.random.randn(len(idx)), index=idx)
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pos = n - 1
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timestamp = idx[pos]
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assert timestamp in s.index
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# it works!
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s[timestamp]
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assert len(s.loc[[timestamp]]) > 0
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def test_indexing_unordered():
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# GH 2437
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rng = date_range(start="2011-01-01", end="2011-01-15")
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ts = Series(np.random.rand(len(rng)), index=rng)
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ts2 = pd.concat([ts[0:4], ts[-4:], ts[4:-4]])
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for t in ts.index:
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expected = ts[t]
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result = ts2[t]
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assert expected == result
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# GH 3448 (ranges)
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def compare(slobj):
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result = ts2[slobj].copy()
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result = result.sort_index()
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expected = ts[slobj]
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expected.index = expected.index._with_freq(None)
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tm.assert_series_equal(result, expected)
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compare(slice("2011-01-01", "2011-01-15"))
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with pytest.raises(KeyError, match="Value based partial slicing on non-monotonic"):
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compare(slice("2010-12-30", "2011-01-15"))
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compare(slice("2011-01-01", "2011-01-16"))
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# partial ranges
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compare(slice("2011-01-01", "2011-01-6"))
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compare(slice("2011-01-06", "2011-01-8"))
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compare(slice("2011-01-06", "2011-01-12"))
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# single values
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result = ts2["2011"].sort_index()
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expected = ts["2011"]
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expected.index = expected.index._with_freq(None)
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tm.assert_series_equal(result, expected)
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def test_indexing_unordered2():
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# diff freq
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rng = date_range(datetime(2005, 1, 1), periods=20, freq="M")
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ts = Series(np.arange(len(rng)), index=rng)
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ts = ts.take(np.random.permutation(20))
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result = ts["2005"]
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for t in result.index:
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assert t.year == 2005
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def test_indexing():
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idx = date_range("2001-1-1", periods=20, freq="M")
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ts = Series(np.random.rand(len(idx)), index=idx)
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# getting
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# GH 3070, make sure semantics work on Series/Frame
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expected = ts["2001"]
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expected.name = "A"
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df = DataFrame({"A": ts})
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# GH#36179 pre-2.0 df["2001"] operated as slicing on rows. in 2.0 it behaves
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# like any other key, so raises
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with pytest.raises(KeyError, match="2001"):
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df["2001"]
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# setting
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ts["2001"] = 1
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expected = ts["2001"]
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expected.name = "A"
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df.loc["2001", "A"] = 1
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with pytest.raises(KeyError, match="2001"):
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df["2001"]
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def test_getitem_str_month_with_datetimeindex():
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# GH3546 (not including times on the last day)
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idx = date_range(start="2013-05-31 00:00", end="2013-05-31 23:00", freq="H")
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ts = Series(range(len(idx)), index=idx)
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expected = ts["2013-05"]
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tm.assert_series_equal(expected, ts)
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idx = date_range(start="2013-05-31 00:00", end="2013-05-31 23:59", freq="S")
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ts = Series(range(len(idx)), index=idx)
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expected = ts["2013-05"]
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tm.assert_series_equal(expected, ts)
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def test_getitem_str_year_with_datetimeindex():
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idx = [
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Timestamp("2013-05-31 00:00"),
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Timestamp(datetime(2013, 5, 31, 23, 59, 59, 999999)),
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]
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ts = Series(range(len(idx)), index=idx)
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expected = ts["2013"]
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tm.assert_series_equal(expected, ts)
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def test_getitem_str_second_with_datetimeindex():
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# GH14826, indexing with a seconds resolution string / datetime object
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df = DataFrame(
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np.random.rand(5, 5),
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columns=["open", "high", "low", "close", "volume"],
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index=date_range("2012-01-02 18:01:00", periods=5, tz="US/Central", freq="s"),
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)
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# this is a single date, so will raise
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with pytest.raises(KeyError, match=r"^'2012-01-02 18:01:02'$"):
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df["2012-01-02 18:01:02"]
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msg = r"Timestamp\('2012-01-02 18:01:02-0600', tz='US/Central'\)"
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with pytest.raises(KeyError, match=msg):
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df[df.index[2]]
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