projektAI/venv/Lib/site-packages/pandas/tests/series/indexing/test_numeric.py
2021-06-06 22:13:05 +02:00

89 lines
2.2 KiB
Python

import numpy as np
import pytest
from pandas import DataFrame, Index, Series
import pandas._testing as tm
def test_slice_float64():
values = np.arange(10.0, 50.0, 2)
index = Index(values)
start, end = values[[5, 15]]
s = Series(np.random.randn(20), index=index)
result = s[start:end]
expected = s.iloc[5:16]
tm.assert_series_equal(result, expected)
result = s.loc[start:end]
tm.assert_series_equal(result, expected)
df = DataFrame(np.random.randn(20, 3), index=index)
result = df[start:end]
expected = df.iloc[5:16]
tm.assert_frame_equal(result, expected)
result = df.loc[start:end]
tm.assert_frame_equal(result, expected)
def test_getitem_negative_out_of_bounds():
s = Series(tm.rands_array(5, 10), index=tm.rands_array(10, 10))
msg = "index -11 is out of bounds for axis 0 with size 10"
with pytest.raises(IndexError, match=msg):
s[-11]
with pytest.raises(IndexError, match=msg):
s[-11] = "foo"
def test_getitem_setitem_slice_bug():
s = Series(range(10), index=list(range(10)))
result = s[-12:]
tm.assert_series_equal(result, s)
result = s[-7:]
tm.assert_series_equal(result, s[3:])
result = s[:-12]
tm.assert_series_equal(result, s[:0])
s = Series(range(10), index=list(range(10)))
s[-12:] = 0
assert (s == 0).all()
s[:-12] = 5
assert (s == 0).all()
def test_getitem_setitem_slice_integers():
s = Series(np.random.randn(8), index=[2, 4, 6, 8, 10, 12, 14, 16])
result = s[:4]
expected = s.reindex([2, 4, 6, 8])
tm.assert_series_equal(result, expected)
s[:4] = 0
assert (s[:4] == 0).all()
assert not (s[4:] == 0).any()
def test_slice_float_get_set(datetime_series):
msg = (
"cannot do slice indexing on DatetimeIndex with these indexers "
r"\[{key}\] of type float"
)
with pytest.raises(TypeError, match=msg.format(key=r"4\.0")):
datetime_series[4.0:10.0]
with pytest.raises(TypeError, match=msg.format(key=r"4\.0")):
datetime_series[4.0:10.0] = 0
with pytest.raises(TypeError, match=msg.format(key=r"4\.5")):
datetime_series[4.5:10.0]
with pytest.raises(TypeError, match=msg.format(key=r"4\.5")):
datetime_series[4.5:10.0] = 0