251 lines
8.4 KiB
Python
251 lines
8.4 KiB
Python
# coding=utf-8
|
|
# pylint: disable-msg=E1101,W0612
|
|
|
|
import pytest
|
|
|
|
import numpy as np
|
|
import pandas as pd
|
|
import pandas._libs.lib as lib
|
|
import pandas.util.testing as tm
|
|
|
|
from .common import TestData
|
|
|
|
|
|
class TestSeriesReplace(TestData):
|
|
def test_replace(self):
|
|
N = 100
|
|
ser = pd.Series(np.random.randn(N))
|
|
ser[0:4] = np.nan
|
|
ser[6:10] = 0
|
|
|
|
# replace list with a single value
|
|
ser.replace([np.nan], -1, inplace=True)
|
|
|
|
exp = ser.fillna(-1)
|
|
tm.assert_series_equal(ser, exp)
|
|
|
|
rs = ser.replace(0., np.nan)
|
|
ser[ser == 0.] = np.nan
|
|
tm.assert_series_equal(rs, ser)
|
|
|
|
ser = pd.Series(np.fabs(np.random.randn(N)), tm.makeDateIndex(N),
|
|
dtype=object)
|
|
ser[:5] = np.nan
|
|
ser[6:10] = 'foo'
|
|
ser[20:30] = 'bar'
|
|
|
|
# replace list with a single value
|
|
rs = ser.replace([np.nan, 'foo', 'bar'], -1)
|
|
|
|
assert (rs[:5] == -1).all()
|
|
assert (rs[6:10] == -1).all()
|
|
assert (rs[20:30] == -1).all()
|
|
assert (pd.isna(ser[:5])).all()
|
|
|
|
# replace with different values
|
|
rs = ser.replace({np.nan: -1, 'foo': -2, 'bar': -3})
|
|
|
|
assert (rs[:5] == -1).all()
|
|
assert (rs[6:10] == -2).all()
|
|
assert (rs[20:30] == -3).all()
|
|
assert (pd.isna(ser[:5])).all()
|
|
|
|
# replace with different values with 2 lists
|
|
rs2 = ser.replace([np.nan, 'foo', 'bar'], [-1, -2, -3])
|
|
tm.assert_series_equal(rs, rs2)
|
|
|
|
# replace inplace
|
|
ser.replace([np.nan, 'foo', 'bar'], -1, inplace=True)
|
|
|
|
assert (ser[:5] == -1).all()
|
|
assert (ser[6:10] == -1).all()
|
|
assert (ser[20:30] == -1).all()
|
|
|
|
ser = pd.Series([np.nan, 0, np.inf])
|
|
tm.assert_series_equal(ser.replace(np.nan, 0), ser.fillna(0))
|
|
|
|
ser = pd.Series([np.nan, 0, 'foo', 'bar', np.inf, None, lib.NaT])
|
|
tm.assert_series_equal(ser.replace(np.nan, 0), ser.fillna(0))
|
|
filled = ser.copy()
|
|
filled[4] = 0
|
|
tm.assert_series_equal(ser.replace(np.inf, 0), filled)
|
|
|
|
ser = pd.Series(self.ts.index)
|
|
tm.assert_series_equal(ser.replace(np.nan, 0), ser.fillna(0))
|
|
|
|
# malformed
|
|
pytest.raises(ValueError, ser.replace, [1, 2, 3], [np.nan, 0])
|
|
|
|
# make sure that we aren't just masking a TypeError because bools don't
|
|
# implement indexing
|
|
with tm.assert_raises_regex(TypeError, 'Cannot compare types .+'):
|
|
ser.replace([1, 2], [np.nan, 0])
|
|
|
|
ser = pd.Series([0, 1, 2, 3, 4])
|
|
result = ser.replace([0, 1, 2, 3, 4], [4, 3, 2, 1, 0])
|
|
tm.assert_series_equal(result, pd.Series([4, 3, 2, 1, 0]))
|
|
|
|
def test_replace_gh5319(self):
|
|
# API change from 0.12?
|
|
# GH 5319
|
|
ser = pd.Series([0, np.nan, 2, 3, 4])
|
|
expected = ser.ffill()
|
|
result = ser.replace([np.nan])
|
|
tm.assert_series_equal(result, expected)
|
|
|
|
ser = pd.Series([0, np.nan, 2, 3, 4])
|
|
expected = ser.ffill()
|
|
result = ser.replace(np.nan)
|
|
tm.assert_series_equal(result, expected)
|
|
# GH 5797
|
|
ser = pd.Series(pd.date_range('20130101', periods=5))
|
|
expected = ser.copy()
|
|
expected.loc[2] = pd.Timestamp('20120101')
|
|
result = ser.replace({pd.Timestamp('20130103'):
|
|
pd.Timestamp('20120101')})
|
|
tm.assert_series_equal(result, expected)
|
|
result = ser.replace(pd.Timestamp('20130103'),
|
|
pd.Timestamp('20120101'))
|
|
tm.assert_series_equal(result, expected)
|
|
|
|
def test_replace_with_single_list(self):
|
|
ser = pd.Series([0, 1, 2, 3, 4])
|
|
result = ser.replace([1, 2, 3])
|
|
tm.assert_series_equal(result, pd.Series([0, 0, 0, 0, 4]))
|
|
|
|
s = ser.copy()
|
|
s.replace([1, 2, 3], inplace=True)
|
|
tm.assert_series_equal(s, pd.Series([0, 0, 0, 0, 4]))
|
|
|
|
# make sure things don't get corrupted when fillna call fails
|
|
s = ser.copy()
|
|
with pytest.raises(ValueError):
|
|
s.replace([1, 2, 3], inplace=True, method='crash_cymbal')
|
|
tm.assert_series_equal(s, ser)
|
|
|
|
def test_replace_mixed_types(self):
|
|
s = pd.Series(np.arange(5), dtype='int64')
|
|
|
|
def check_replace(to_rep, val, expected):
|
|
sc = s.copy()
|
|
r = s.replace(to_rep, val)
|
|
sc.replace(to_rep, val, inplace=True)
|
|
tm.assert_series_equal(expected, r)
|
|
tm.assert_series_equal(expected, sc)
|
|
|
|
# MUST upcast to float
|
|
e = pd.Series([0., 1., 2., 3., 4.])
|
|
tr, v = [3], [3.0]
|
|
check_replace(tr, v, e)
|
|
|
|
# MUST upcast to float
|
|
e = pd.Series([0, 1, 2, 3.5, 4])
|
|
tr, v = [3], [3.5]
|
|
check_replace(tr, v, e)
|
|
|
|
# casts to object
|
|
e = pd.Series([0, 1, 2, 3.5, 'a'])
|
|
tr, v = [3, 4], [3.5, 'a']
|
|
check_replace(tr, v, e)
|
|
|
|
# again casts to object
|
|
e = pd.Series([0, 1, 2, 3.5, pd.Timestamp('20130101')])
|
|
tr, v = [3, 4], [3.5, pd.Timestamp('20130101')]
|
|
check_replace(tr, v, e)
|
|
|
|
# casts to object
|
|
e = pd.Series([0, 1, 2, 3.5, True], dtype='object')
|
|
tr, v = [3, 4], [3.5, True]
|
|
check_replace(tr, v, e)
|
|
|
|
# test an object with dates + floats + integers + strings
|
|
dr = pd.date_range('1/1/2001', '1/10/2001',
|
|
freq='D').to_series().reset_index(drop=True)
|
|
result = dr.astype(object).replace(
|
|
[dr[0], dr[1], dr[2]], [1.0, 2, 'a'])
|
|
expected = pd.Series([1.0, 2, 'a'] + dr[3:].tolist(), dtype=object)
|
|
tm.assert_series_equal(result, expected)
|
|
|
|
def test_replace_bool_with_string_no_op(self):
|
|
s = pd.Series([True, False, True])
|
|
result = s.replace('fun', 'in-the-sun')
|
|
tm.assert_series_equal(s, result)
|
|
|
|
def test_replace_bool_with_string(self):
|
|
# nonexistent elements
|
|
s = pd.Series([True, False, True])
|
|
result = s.replace(True, '2u')
|
|
expected = pd.Series(['2u', False, '2u'])
|
|
tm.assert_series_equal(expected, result)
|
|
|
|
def test_replace_bool_with_bool(self):
|
|
s = pd.Series([True, False, True])
|
|
result = s.replace(True, False)
|
|
expected = pd.Series([False] * len(s))
|
|
tm.assert_series_equal(expected, result)
|
|
|
|
def test_replace_with_dict_with_bool_keys(self):
|
|
s = pd.Series([True, False, True])
|
|
with tm.assert_raises_regex(TypeError, 'Cannot compare types .+'):
|
|
s.replace({'asdf': 'asdb', True: 'yes'})
|
|
|
|
def test_replace2(self):
|
|
N = 100
|
|
ser = pd.Series(np.fabs(np.random.randn(N)), tm.makeDateIndex(N),
|
|
dtype=object)
|
|
ser[:5] = np.nan
|
|
ser[6:10] = 'foo'
|
|
ser[20:30] = 'bar'
|
|
|
|
# replace list with a single value
|
|
rs = ser.replace([np.nan, 'foo', 'bar'], -1)
|
|
|
|
assert (rs[:5] == -1).all()
|
|
assert (rs[6:10] == -1).all()
|
|
assert (rs[20:30] == -1).all()
|
|
assert (pd.isna(ser[:5])).all()
|
|
|
|
# replace with different values
|
|
rs = ser.replace({np.nan: -1, 'foo': -2, 'bar': -3})
|
|
|
|
assert (rs[:5] == -1).all()
|
|
assert (rs[6:10] == -2).all()
|
|
assert (rs[20:30] == -3).all()
|
|
assert (pd.isna(ser[:5])).all()
|
|
|
|
# replace with different values with 2 lists
|
|
rs2 = ser.replace([np.nan, 'foo', 'bar'], [-1, -2, -3])
|
|
tm.assert_series_equal(rs, rs2)
|
|
|
|
# replace inplace
|
|
ser.replace([np.nan, 'foo', 'bar'], -1, inplace=True)
|
|
assert (ser[:5] == -1).all()
|
|
assert (ser[6:10] == -1).all()
|
|
assert (ser[20:30] == -1).all()
|
|
|
|
def test_replace_with_empty_dictlike(self):
|
|
# GH 15289
|
|
s = pd.Series(list('abcd'))
|
|
tm.assert_series_equal(s, s.replace(dict()))
|
|
tm.assert_series_equal(s, s.replace(pd.Series([])))
|
|
|
|
def test_replace_string_with_number(self):
|
|
# GH 15743
|
|
s = pd.Series([1, 2, 3])
|
|
result = s.replace('2', np.nan)
|
|
expected = pd.Series([1, 2, 3])
|
|
tm.assert_series_equal(expected, result)
|
|
|
|
def test_replace_unicode_with_number(self):
|
|
# GH 15743
|
|
s = pd.Series([1, 2, 3])
|
|
result = s.replace(u'2', np.nan)
|
|
expected = pd.Series([1, 2, 3])
|
|
tm.assert_series_equal(expected, result)
|
|
|
|
def test_replace_mixed_types_with_string(self):
|
|
# Testing mixed
|
|
s = pd.Series([1, 2, 3, '4', 4, 5])
|
|
result = s.replace([2, '4'], np.nan)
|
|
expected = pd.Series([1, np.nan, 3, np.nan, 4, 5])
|
|
tm.assert_series_equal(expected, result)
|