You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
2.9 KiB
88 lines
2.9 KiB
import pytest
|
|
|
|
import pandas._testing as tm
|
|
|
|
|
|
class TestDataFrameTake:
|
|
def test_take(self, float_frame):
|
|
# homogeneous
|
|
order = [3, 1, 2, 0]
|
|
for df in [float_frame]:
|
|
|
|
result = df.take(order, axis=0)
|
|
expected = df.reindex(df.index.take(order))
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# axis = 1
|
|
result = df.take(order, axis=1)
|
|
expected = df.loc[:, ["D", "B", "C", "A"]]
|
|
tm.assert_frame_equal(result, expected, check_names=False)
|
|
|
|
# negative indices
|
|
order = [2, 1, -1]
|
|
for df in [float_frame]:
|
|
|
|
result = df.take(order, axis=0)
|
|
expected = df.reindex(df.index.take(order))
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
result = df.take(order, axis=0)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# axis = 1
|
|
result = df.take(order, axis=1)
|
|
expected = df.loc[:, ["C", "B", "D"]]
|
|
tm.assert_frame_equal(result, expected, check_names=False)
|
|
|
|
# illegal indices
|
|
msg = "indices are out-of-bounds"
|
|
with pytest.raises(IndexError, match=msg):
|
|
df.take([3, 1, 2, 30], axis=0)
|
|
with pytest.raises(IndexError, match=msg):
|
|
df.take([3, 1, 2, -31], axis=0)
|
|
with pytest.raises(IndexError, match=msg):
|
|
df.take([3, 1, 2, 5], axis=1)
|
|
with pytest.raises(IndexError, match=msg):
|
|
df.take([3, 1, 2, -5], axis=1)
|
|
|
|
def test_take_mixed_type(self, float_string_frame):
|
|
|
|
# mixed-dtype
|
|
order = [4, 1, 2, 0, 3]
|
|
for df in [float_string_frame]:
|
|
|
|
result = df.take(order, axis=0)
|
|
expected = df.reindex(df.index.take(order))
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# axis = 1
|
|
result = df.take(order, axis=1)
|
|
expected = df.loc[:, ["foo", "B", "C", "A", "D"]]
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# negative indices
|
|
order = [4, 1, -2]
|
|
for df in [float_string_frame]:
|
|
|
|
result = df.take(order, axis=0)
|
|
expected = df.reindex(df.index.take(order))
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# axis = 1
|
|
result = df.take(order, axis=1)
|
|
expected = df.loc[:, ["foo", "B", "D"]]
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
def test_take_mixed_numeric(self, mixed_float_frame, mixed_int_frame):
|
|
# by dtype
|
|
order = [1, 2, 0, 3]
|
|
for df in [mixed_float_frame, mixed_int_frame]:
|
|
|
|
result = df.take(order, axis=0)
|
|
expected = df.reindex(df.index.take(order))
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# axis = 1
|
|
result = df.take(order, axis=1)
|
|
expected = df.loc[:, ["B", "C", "A", "D"]]
|
|
tm.assert_frame_equal(result, expected)
|
|
|