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from __future__ import division, absolute_import, print_function
import sys
import numpy as np
from numpy.core.multiarray import _vec_string
from numpy.compat import asbytes, asbytes_nested, sixu
from numpy.testing import (
TestCase, run_module_suite, assert_, assert_equal, assert_array_equal
)
kw_unicode_true = {'unicode': True} # make 2to3 work properly
kw_unicode_false = {'unicode': False}
class TestBasic(TestCase):
def test_from_object_array(self):
A = np.array([['abc', 2],
['long ', '0123456789']], dtype='O')
B = np.char.array(A)
assert_equal(B.dtype.itemsize, 10)
assert_array_equal(B, asbytes_nested([['abc', '2'],
['long', '0123456789']]))
def test_from_object_array_unicode(self):
A = np.array([['abc', sixu('Sigma \u03a3')],
['long ', '0123456789']], dtype='O')
self.assertRaises(ValueError, np.char.array, (A,))
B = np.char.array(A, **kw_unicode_true)
assert_equal(B.dtype.itemsize, 10 * np.array('a', 'U').dtype.itemsize)
assert_array_equal(B, [['abc', sixu('Sigma \u03a3')],
['long', '0123456789']])
def test_from_string_array(self):
A = np.array(asbytes_nested([['abc', 'foo'],
['long ', '0123456789']]))
assert_equal(A.dtype.type, np.string_)
B = np.char.array(A)
assert_array_equal(B, A)
assert_equal(B.dtype, A.dtype)
assert_equal(B.shape, A.shape)
B[0, 0] = 'changed'
assert_(B[0, 0] != A[0, 0])
C = np.char.asarray(A)
assert_array_equal(C, A)
assert_equal(C.dtype, A.dtype)
C[0, 0] = 'changed again'
assert_(C[0, 0] != B[0, 0])
assert_(C[0, 0] == A[0, 0])
def test_from_unicode_array(self):
A = np.array([['abc', sixu('Sigma \u03a3')],
['long ', '0123456789']])
assert_equal(A.dtype.type, np.unicode_)
B = np.char.array(A)
assert_array_equal(B, A)
assert_equal(B.dtype, A.dtype)
assert_equal(B.shape, A.shape)
B = np.char.array(A, **kw_unicode_true)
assert_array_equal(B, A)
assert_equal(B.dtype, A.dtype)
assert_equal(B.shape, A.shape)
def fail():
np.char.array(A, **kw_unicode_false)
self.assertRaises(UnicodeEncodeError, fail)
def test_unicode_upconvert(self):
A = np.char.array(['abc'])
B = np.char.array([sixu('\u03a3')])
assert_(issubclass((A + B).dtype.type, np.unicode_))
def test_from_string(self):
A = np.char.array(asbytes('abc'))
assert_equal(len(A), 1)
assert_equal(len(A[0]), 3)
assert_(issubclass(A.dtype.type, np.string_))
def test_from_unicode(self):
A = np.char.array(sixu('\u03a3'))
assert_equal(len(A), 1)
assert_equal(len(A[0]), 1)
assert_equal(A.itemsize, 4)
assert_(issubclass(A.dtype.type, np.unicode_))
class TestVecString(TestCase):
def test_non_existent_method(self):
def fail():
_vec_string('a', np.string_, 'bogus')
self.assertRaises(AttributeError, fail)
def test_non_string_array(self):
def fail():
_vec_string(1, np.string_, 'strip')
self.assertRaises(TypeError, fail)
def test_invalid_args_tuple(self):
def fail():
_vec_string(['a'], np.string_, 'strip', 1)
self.assertRaises(TypeError, fail)
def test_invalid_type_descr(self):
def fail():
_vec_string(['a'], 'BOGUS', 'strip')
self.assertRaises(TypeError, fail)
def test_invalid_function_args(self):
def fail():
_vec_string(['a'], np.string_, 'strip', (1,))
self.assertRaises(TypeError, fail)
def test_invalid_result_type(self):
def fail():
_vec_string(['a'], np.integer, 'strip')
self.assertRaises(TypeError, fail)
def test_broadcast_error(self):
def fail():
_vec_string([['abc', 'def']], np.integer, 'find', (['a', 'd', 'j'],))
self.assertRaises(ValueError, fail)
class TestWhitespace(TestCase):
def setUp(self):
self.A = np.array([['abc ', '123 '],
['789 ', 'xyz ']]).view(np.chararray)
self.B = np.array([['abc', '123'],
['789', 'xyz']]).view(np.chararray)
def test1(self):
assert_(np.all(self.A == self.B))
assert_(np.all(self.A >= self.B))
assert_(np.all(self.A <= self.B))
assert_(not np.any(self.A > self.B))
assert_(not np.any(self.A < self.B))
assert_(not np.any(self.A != self.B))
class TestChar(TestCase):
def setUp(self):
self.A = np.array('abc1', dtype='c').view(np.chararray)
def test_it(self):
assert_equal(self.A.shape, (4,))
assert_equal(self.A.upper()[:2].tobytes(), asbytes('AB'))
class TestComparisons(TestCase):
def setUp(self):
self.A = np.array([['abc', '123'],
['789', 'xyz']]).view(np.chararray)
self.B = np.array([['efg', '123 '],
['051', 'tuv']]).view(np.chararray)
def test_not_equal(self):
assert_array_equal((self.A != self.B), [[True, False], [True, True]])
def test_equal(self):
assert_array_equal((self.A == self.B), [[False, True], [False, False]])
def test_greater_equal(self):
assert_array_equal((self.A >= self.B), [[False, True], [True, True]])
def test_less_equal(self):
assert_array_equal((self.A <= self.B), [[True, True], [False, False]])
def test_greater(self):
assert_array_equal((self.A > self.B), [[False, False], [True, True]])
def test_less(self):
assert_array_equal((self.A < self.B), [[True, False], [False, False]])
class TestComparisonsMixed1(TestComparisons):
"""Ticket #1276"""
def setUp(self):
TestComparisons.setUp(self)
self.B = np.array([['efg', '123 '],
['051', 'tuv']], np.unicode_).view(np.chararray)
class TestComparisonsMixed2(TestComparisons):
"""Ticket #1276"""
def setUp(self):
TestComparisons.setUp(self)
self.A = np.array([['abc', '123'],
['789', 'xyz']], np.unicode_).view(np.chararray)
class TestInformation(TestCase):
def setUp(self):
self.A = np.array([[' abc ', ''],
['12345', 'MixedCase'],
['123 \t 345 \0 ', 'UPPER']]).view(np.chararray)
self.B = np.array([[sixu(' \u03a3 '), sixu('')],
[sixu('12345'), sixu('MixedCase')],
[sixu('123 \t 345 \0 '), sixu('UPPER')]]).view(np.chararray)
def test_len(self):
assert_(issubclass(np.char.str_len(self.A).dtype.type, np.integer))
assert_array_equal(np.char.str_len(self.A), [[5, 0], [5, 9], [12, 5]])
assert_array_equal(np.char.str_len(self.B), [[3, 0], [5, 9], [12, 5]])
def test_count(self):
assert_(issubclass(self.A.count('').dtype.type, np.integer))
assert_array_equal(self.A.count('a'), [[1, 0], [0, 1], [0, 0]])
assert_array_equal(self.A.count('123'), [[0, 0], [1, 0], [1, 0]])
# Python doesn't seem to like counting NULL characters
# assert_array_equal(self.A.count('\0'), [[0, 0], [0, 0], [1, 0]])
assert_array_equal(self.A.count('a', 0, 2), [[1, 0], [0, 0], [0, 0]])
assert_array_equal(self.B.count('a'), [[0, 0], [0, 1], [0, 0]])
assert_array_equal(self.B.count('123'), [[0, 0], [1, 0], [1, 0]])
# assert_array_equal(self.B.count('\0'), [[0, 0], [0, 0], [1, 0]])
def test_endswith(self):
assert_(issubclass(self.A.endswith('').dtype.type, np.bool_))
assert_array_equal(self.A.endswith(' '), [[1, 0], [0, 0], [1, 0]])
assert_array_equal(self.A.endswith('3', 0, 3), [[0, 0], [1, 0], [1, 0]])
def fail():
self.A.endswith('3', 'fdjk')
self.assertRaises(TypeError, fail)
def test_find(self):
assert_(issubclass(self.A.find('a').dtype.type, np.integer))
assert_array_equal(self.A.find('a'), [[1, -1], [-1, 6], [-1, -1]])
assert_array_equal(self.A.find('3'), [[-1, -1], [2, -1], [2, -1]])
assert_array_equal(self.A.find('a', 0, 2), [[1, -1], [-1, -1], [-1, -1]])
assert_array_equal(self.A.find(['1', 'P']), [[-1, -1], [0, -1], [0, 1]])
def test_index(self):
def fail():
self.A.index('a')
self.assertRaises(ValueError, fail)
assert_(np.char.index('abcba', 'b') == 1)
assert_(issubclass(np.char.index('abcba', 'b').dtype.type, np.integer))
def test_isalnum(self):
assert_(issubclass(self.A.isalnum().dtype.type, np.bool_))
assert_array_equal(self.A.isalnum(), [[False, False], [True, True], [False, True]])
def test_isalpha(self):
assert_(issubclass(self.A.isalpha().dtype.type, np.bool_))
assert_array_equal(self.A.isalpha(), [[False, False], [False, True], [False, True]])
def test_isdigit(self):
assert_(issubclass(self.A.isdigit().dtype.type, np.bool_))
assert_array_equal(self.A.isdigit(), [[False, False], [True, False], [False, False]])
def test_islower(self):
assert_(issubclass(self.A.islower().dtype.type, np.bool_))
assert_array_equal(self.A.islower(), [[True, False], [False, False], [False, False]])
def test_isspace(self):
assert_(issubclass(self.A.isspace().dtype.type, np.bool_))
assert_array_equal(self.A.isspace(), [[False, False], [False, False], [False, False]])
def test_istitle(self):
assert_(issubclass(self.A.istitle().dtype.type, np.bool_))
assert_array_equal(self.A.istitle(), [[False, False], [False, False], [False, False]])
def test_isupper(self):
assert_(issubclass(self.A.isupper().dtype.type, np.bool_))
assert_array_equal(self.A.isupper(), [[False, False], [False, False], [False, True]])
def test_rfind(self):
assert_(issubclass(self.A.rfind('a').dtype.type, np.integer))
assert_array_equal(self.A.rfind('a'), [[1, -1], [-1, 6], [-1, -1]])
assert_array_equal(self.A.rfind('3'), [[-1, -1], [2, -1], [6, -1]])
assert_array_equal(self.A.rfind('a', 0, 2), [[1, -1], [-1, -1], [-1, -1]])
assert_array_equal(self.A.rfind(['1', 'P']), [[-1, -1], [0, -1], [0, 2]])
def test_rindex(self):
def fail():
self.A.rindex('a')
self.assertRaises(ValueError, fail)
assert_(np.char.rindex('abcba', 'b') == 3)
assert_(issubclass(np.char.rindex('abcba', 'b').dtype.type, np.integer))
def test_startswith(self):
assert_(issubclass(self.A.startswith('').dtype.type, np.bool_))
assert_array_equal(self.A.startswith(' '), [[1, 0], [0, 0], [0, 0]])
assert_array_equal(self.A.startswith('1', 0, 3), [[0, 0], [1, 0], [1, 0]])
def fail():
self.A.startswith('3', 'fdjk')
self.assertRaises(TypeError, fail)
class TestMethods(TestCase):
def setUp(self):
self.A = np.array([[' abc ', ''],
['12345', 'MixedCase'],
['123 \t 345 \0 ', 'UPPER']],
dtype='S').view(np.chararray)
self.B = np.array([[sixu(' \u03a3 '), sixu('')],
[sixu('12345'), sixu('MixedCase')],
[sixu('123 \t 345 \0 '), sixu('UPPER')]]).view(np.chararray)
def test_capitalize(self):
tgt = asbytes_nested([[' abc ', ''],
['12345', 'Mixedcase'],
['123 \t 345 \0 ', 'Upper']])
assert_(issubclass(self.A.capitalize().dtype.type, np.string_))
assert_array_equal(self.A.capitalize(), tgt)
tgt = [[sixu(' \u03c3 '), ''],
['12345', 'Mixedcase'],
['123 \t 345 \0 ', 'Upper']]
assert_(issubclass(self.B.capitalize().dtype.type, np.unicode_))
assert_array_equal(self.B.capitalize(), tgt)
def test_center(self):
assert_(issubclass(self.A.center(10).dtype.type, np.string_))
C = self.A.center([10, 20])
assert_array_equal(np.char.str_len(C), [[10, 20], [10, 20], [12, 20]])
C = self.A.center(20, asbytes('#'))
assert_(np.all(C.startswith(asbytes('#'))))
assert_(np.all(C.endswith(asbytes('#'))))
C = np.char.center(asbytes('FOO'), [[10, 20], [15, 8]])
tgt = asbytes_nested([[' FOO ', ' FOO '],
[' FOO ', ' FOO ']])
assert_(issubclass(C.dtype.type, np.string_))
assert_array_equal(C, tgt)
def test_decode(self):
if sys.version_info[0] >= 3:
A = np.char.array([asbytes('\\u03a3')])
assert_(A.decode('unicode-escape')[0] == '\u03a3')
else:
A = np.char.array(['736563726574206d657373616765'])
assert_(A.decode('hex_codec')[0] == 'secret message')
def test_encode(self):
B = self.B.encode('unicode_escape')
assert_(B[0][0] == str(' \\u03a3 ').encode('latin1'))
def test_expandtabs(self):
T = self.A.expandtabs()
assert_(T[2, 0] == asbytes('123 345 \0'))
def test_join(self):
if sys.version_info[0] >= 3:
# NOTE: list(b'123') == [49, 50, 51]
# so that b','.join(b'123') results to an error on Py3
A0 = self.A.decode('ascii')
else:
A0 = self.A
A = np.char.join([',', '#'], A0)
if sys.version_info[0] >= 3:
assert_(issubclass(A.dtype.type, np.unicode_))
else:
assert_(issubclass(A.dtype.type, np.string_))
tgt = np.array([[' ,a,b,c, ', ''],
['1,2,3,4,5', 'M#i#x#e#d#C#a#s#e'],
['1,2,3, ,\t, ,3,4,5, ,\x00, ', 'U#P#P#E#R']])
assert_array_equal(np.char.join([',', '#'], A0), tgt)
def test_ljust(self):
assert_(issubclass(self.A.ljust(10).dtype.type, np.string_))
C = self.A.ljust([10, 20])
assert_array_equal(np.char.str_len(C), [[10, 20], [10, 20], [12, 20]])
C = self.A.ljust(20, asbytes('#'))
assert_array_equal(C.startswith(asbytes('#')), [
[False, True], [False, False], [False, False]])
assert_(np.all(C.endswith(asbytes('#'))))
C = np.char.ljust(asbytes('FOO'), [[10, 20], [15, 8]])
tgt = asbytes_nested([['FOO ', 'FOO '],
['FOO ', 'FOO ']])
assert_(issubclass(C.dtype.type, np.string_))
assert_array_equal(C, tgt)
def test_lower(self):
tgt = asbytes_nested([[' abc ', ''],
['12345', 'mixedcase'],
['123 \t 345 \0 ', 'upper']])
assert_(issubclass(self.A.lower().dtype.type, np.string_))
assert_array_equal(self.A.lower(), tgt)
tgt = [[sixu(' \u03c3 '), sixu('')],
[sixu('12345'), sixu('mixedcase')],
[sixu('123 \t 345 \0 '), sixu('upper')]]
assert_(issubclass(self.B.lower().dtype.type, np.unicode_))
assert_array_equal(self.B.lower(), tgt)
def test_lstrip(self):
tgt = asbytes_nested([['abc ', ''],
['12345', 'MixedCase'],
['123 \t 345 \0 ', 'UPPER']])
assert_(issubclass(self.A.lstrip().dtype.type, np.string_))
assert_array_equal(self.A.lstrip(), tgt)
tgt = asbytes_nested([[' abc', ''],
['2345', 'ixedCase'],
['23 \t 345 \x00', 'UPPER']])
assert_array_equal(self.A.lstrip(asbytes_nested(['1', 'M'])), tgt)
tgt = [[sixu('\u03a3 '), ''],
['12345', 'MixedCase'],
['123 \t 345 \0 ', 'UPPER']]
assert_(issubclass(self.B.lstrip().dtype.type, np.unicode_))
assert_array_equal(self.B.lstrip(), tgt)
def test_partition(self):
P = self.A.partition(asbytes_nested(['3', 'M']))
tgt = asbytes_nested([[(' abc ', '', ''), ('', '', '')],
[('12', '3', '45'), ('', 'M', 'ixedCase')],
[('12', '3', ' \t 345 \0 '), ('UPPER', '', '')]])
assert_(issubclass(P.dtype.type, np.string_))
assert_array_equal(P, tgt)
def test_replace(self):
R = self.A.replace(asbytes_nested(['3', 'a']),
asbytes_nested(['##########', '@']))
tgt = asbytes_nested([[' abc ', ''],
['12##########45', 'MixedC@se'],
['12########## \t ##########45 \x00', 'UPPER']])
assert_(issubclass(R.dtype.type, np.string_))
assert_array_equal(R, tgt)
if sys.version_info[0] < 3:
# NOTE: b'abc'.replace(b'a', 'b') is not allowed on Py3
R = self.A.replace(asbytes('a'), sixu('\u03a3'))
tgt = [[sixu(' \u03a3bc '), ''],
['12345', sixu('MixedC\u03a3se')],
['123 \t 345 \x00', 'UPPER']]
assert_(issubclass(R.dtype.type, np.unicode_))
assert_array_equal(R, tgt)
def test_rjust(self):
assert_(issubclass(self.A.rjust(10).dtype.type, np.string_))
C = self.A.rjust([10, 20])
assert_array_equal(np.char.str_len(C), [[10, 20], [10, 20], [12, 20]])
C = self.A.rjust(20, asbytes('#'))
assert_(np.all(C.startswith(asbytes('#'))))
assert_array_equal(C.endswith(asbytes('#')),
[[False, True], [False, False], [False, False]])
C = np.char.rjust(asbytes('FOO'), [[10, 20], [15, 8]])
tgt = asbytes_nested([[' FOO', ' FOO'],
[' FOO', ' FOO']])
assert_(issubclass(C.dtype.type, np.string_))
assert_array_equal(C, tgt)
def test_rpartition(self):
P = self.A.rpartition(asbytes_nested(['3', 'M']))
tgt = asbytes_nested([[('', '', ' abc '), ('', '', '')],
[('12', '3', '45'), ('', 'M', 'ixedCase')],
[('123 \t ', '3', '45 \0 '), ('', '', 'UPPER')]])
assert_(issubclass(P.dtype.type, np.string_))
assert_array_equal(P, tgt)
def test_rsplit(self):
A = self.A.rsplit(asbytes('3'))
tgt = asbytes_nested([[[' abc '], ['']],
[['12', '45'], ['MixedCase']],
[['12', ' \t ', '45 \x00 '], ['UPPER']]])
assert_(issubclass(A.dtype.type, np.object_))
assert_equal(A.tolist(), tgt)
def test_rstrip(self):
assert_(issubclass(self.A.rstrip().dtype.type, np.string_))
tgt = asbytes_nested([[' abc', ''],
['12345', 'MixedCase'],
['123 \t 345', 'UPPER']])
assert_array_equal(self.A.rstrip(), tgt)
tgt = asbytes_nested([[' abc ', ''],
['1234', 'MixedCase'],
['123 \t 345 \x00', 'UPP']
])
assert_array_equal(self.A.rstrip(asbytes_nested(['5', 'ER'])), tgt)
tgt = [[sixu(' \u03a3'), ''],
['12345', 'MixedCase'],
['123 \t 345', 'UPPER']]
assert_(issubclass(self.B.rstrip().dtype.type, np.unicode_))
assert_array_equal(self.B.rstrip(), tgt)
def test_strip(self):
tgt = asbytes_nested([['abc', ''],
['12345', 'MixedCase'],
['123 \t 345', 'UPPER']])
assert_(issubclass(self.A.strip().dtype.type, np.string_))
assert_array_equal(self.A.strip(), tgt)
tgt = asbytes_nested([[' abc ', ''],
['234', 'ixedCas'],
['23 \t 345 \x00', 'UPP']])
assert_array_equal(self.A.strip(asbytes_nested(['15', 'EReM'])), tgt)
tgt = [[sixu('\u03a3'), ''],
['12345', 'MixedCase'],
['123 \t 345', 'UPPER']]
assert_(issubclass(self.B.strip().dtype.type, np.unicode_))
assert_array_equal(self.B.strip(), tgt)
def test_split(self):
A = self.A.split(asbytes('3'))
tgt = asbytes_nested([
[[' abc '], ['']],
[['12', '45'], ['MixedCase']],
[['12', ' \t ', '45 \x00 '], ['UPPER']]])
assert_(issubclass(A.dtype.type, np.object_))
assert_equal(A.tolist(), tgt)
def test_splitlines(self):
A = np.char.array(['abc\nfds\nwer']).splitlines()
assert_(issubclass(A.dtype.type, np.object_))
assert_(A.shape == (1,))
assert_(len(A[0]) == 3)
def test_swapcase(self):
tgt = asbytes_nested([[' ABC ', ''],
['12345', 'mIXEDcASE'],
['123 \t 345 \0 ', 'upper']])
assert_(issubclass(self.A.swapcase().dtype.type, np.string_))
assert_array_equal(self.A.swapcase(), tgt)
tgt = [[sixu(' \u03c3 '), sixu('')],
[sixu('12345'), sixu('mIXEDcASE')],
[sixu('123 \t 345 \0 '), sixu('upper')]]
assert_(issubclass(self.B.swapcase().dtype.type, np.unicode_))
assert_array_equal(self.B.swapcase(), tgt)
def test_title(self):
tgt = asbytes_nested([[' Abc ', ''],
['12345', 'Mixedcase'],
['123 \t 345 \0 ', 'Upper']])
assert_(issubclass(self.A.title().dtype.type, np.string_))
assert_array_equal(self.A.title(), tgt)
tgt = [[sixu(' \u03a3 '), sixu('')],
[sixu('12345'), sixu('Mixedcase')],
[sixu('123 \t 345 \0 '), sixu('Upper')]]
assert_(issubclass(self.B.title().dtype.type, np.unicode_))
assert_array_equal(self.B.title(), tgt)
def test_upper(self):
tgt = asbytes_nested([[' ABC ', ''],
['12345', 'MIXEDCASE'],
['123 \t 345 \0 ', 'UPPER']])
assert_(issubclass(self.A.upper().dtype.type, np.string_))
assert_array_equal(self.A.upper(), tgt)
tgt = [[sixu(' \u03a3 '), sixu('')],
[sixu('12345'), sixu('MIXEDCASE')],
[sixu('123 \t 345 \0 '), sixu('UPPER')]]
assert_(issubclass(self.B.upper().dtype.type, np.unicode_))
assert_array_equal(self.B.upper(), tgt)
def test_isnumeric(self):
def fail():
self.A.isnumeric()
self.assertRaises(TypeError, fail)
assert_(issubclass(self.B.isnumeric().dtype.type, np.bool_))
assert_array_equal(self.B.isnumeric(), [
[False, False], [True, False], [False, False]])
def test_isdecimal(self):
def fail():
self.A.isdecimal()
self.assertRaises(TypeError, fail)
assert_(issubclass(self.B.isdecimal().dtype.type, np.bool_))
assert_array_equal(self.B.isdecimal(), [
[False, False], [True, False], [False, False]])
class TestOperations(TestCase):
def setUp(self):
self.A = np.array([['abc', '123'],
['789', 'xyz']]).view(np.chararray)
self.B = np.array([['efg', '456'],
['051', 'tuv']]).view(np.chararray)
def test_add(self):
AB = np.array([['abcefg', '123456'],
['789051', 'xyztuv']]).view(np.chararray)
assert_array_equal(AB, (self.A + self.B))
assert_(len((self.A + self.B)[0][0]) == 6)
def test_radd(self):
QA = np.array([['qabc', 'q123'],
['q789', 'qxyz']]).view(np.chararray)
assert_array_equal(QA, ('q' + self.A))
def test_mul(self):
A = self.A
for r in (2, 3, 5, 7, 197):
Ar = np.array([[A[0, 0]*r, A[0, 1]*r],
[A[1, 0]*r, A[1, 1]*r]]).view(np.chararray)
assert_array_equal(Ar, (self.A * r))
for ob in [object(), 'qrs']:
try:
A * ob
except ValueError:
pass
else:
self.fail("chararray can only be multiplied by integers")
def test_rmul(self):
A = self.A
for r in (2, 3, 5, 7, 197):
Ar = np.array([[A[0, 0]*r, A[0, 1]*r],
[A[1, 0]*r, A[1, 1]*r]]).view(np.chararray)
assert_array_equal(Ar, (r * self.A))
for ob in [object(), 'qrs']:
try:
ob * A
except ValueError:
pass
else:
self.fail("chararray can only be multiplied by integers")
def test_mod(self):
"""Ticket #856"""
F = np.array([['%d', '%f'], ['%s', '%r']]).view(np.chararray)
C = np.array([[3, 7], [19, 1]])
FC = np.array([['3', '7.000000'],
['19', '1']]).view(np.chararray)
assert_array_equal(FC, F % C)
A = np.array([['%.3f', '%d'], ['%s', '%r']]).view(np.chararray)
A1 = np.array([['1.000', '1'], ['1', '1']]).view(np.chararray)
assert_array_equal(A1, (A % 1))
A2 = np.array([['1.000', '2'], ['3', '4']]).view(np.chararray)
assert_array_equal(A2, (A % [[1, 2], [3, 4]]))
def test_rmod(self):
assert_(("%s" % self.A) == str(self.A))
assert_(("%r" % self.A) == repr(self.A))
for ob in [42, object()]:
try:
ob % self.A
except TypeError:
pass
else:
self.fail("chararray __rmod__ should fail with "
"non-string objects")
def test_slice(self):
"""Regression test for https://github.com/numpy/numpy/issues/5982"""
arr = np.array([['abc ', 'def '], ['geh ', 'ijk ']],
dtype='S4').view(np.chararray)
sl1 = arr[:]
assert_array_equal(sl1, arr)
assert_(sl1.base is arr)
assert_(sl1.base.base is arr.base)
sl2 = arr[:, :]
assert_array_equal(sl2, arr)
assert_(sl2.base is arr)
assert_(sl2.base.base is arr.base)
assert_(arr[0, 0] == asbytes('abc'))
def test_empty_indexing():
"""Regression test for ticket 1948."""
# Check that indexing a chararray with an empty list/array returns an
# empty chararray instead of a chararray with a single empty string in it.
s = np.chararray((4,))
assert_(s[[]].size == 0)
if __name__ == "__main__":
run_module_suite()