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# -*- coding: utf-8 -*-
from __future__ import division, absolute_import, print_function
import sys
import numpy as np
from numpy.testing import (
TestCase, run_module_suite, assert_, assert_equal
)
class TestArrayRepr(object):
def test_nan_inf(self):
x = np.array([np.nan, np.inf])
assert_equal(repr(x), 'array([ nan, inf])')
def test_subclass(self):
class sub(np.ndarray): pass
# one dimensional
x1d = np.array([1, 2]).view(sub)
assert_equal(repr(x1d), 'sub([1, 2])')
# two dimensional
x2d = np.array([[1, 2], [3, 4]]).view(sub)
assert_equal(repr(x2d),
'sub([[1, 2],\n'
' [3, 4]])')
# two dimensional with flexible dtype
xstruct = np.ones((2,2), dtype=[('a', 'i4')]).view(sub)
assert_equal(repr(xstruct),
"sub([[(1,), (1,)],\n"
" [(1,), (1,)]],\n"
" dtype=[('a', '<i4')])"
)
def test_self_containing(self):
arr0d = np.array(None)
arr0d[()] = arr0d
assert_equal(repr(arr0d),
'array(array(..., dtype=object), dtype=object)')
arr1d = np.array([None, None])
arr1d[1] = arr1d
assert_equal(repr(arr1d),
'array([None, array(..., dtype=object)], dtype=object)')
first = np.array(None)
second = np.array(None)
first[()] = second
second[()] = first
assert_equal(repr(first),
'array(array(array(..., dtype=object), dtype=object), dtype=object)')
def test_containing_list(self):
# printing square brackets directly would be ambiguuous
arr1d = np.array([None, None])
arr1d[0] = [1, 2]
arr1d[1] = [3]
assert_equal(repr(arr1d),
'array([list([1, 2]), list([3])], dtype=object)')
class TestComplexArray(TestCase):
def test_str(self):
rvals = [0, 1, -1, np.inf, -np.inf, np.nan]
cvals = [complex(rp, ip) for rp in rvals for ip in rvals]
dtypes = [np.complex64, np.cdouble, np.clongdouble]
actual = [str(np.array([c], dt)) for c in cvals for dt in dtypes]
wanted = [
'[ 0.+0.j]', '[ 0.+0.j]', '[ 0.0+0.0j]',
'[ 0.+1.j]', '[ 0.+1.j]', '[ 0.0+1.0j]',
'[ 0.-1.j]', '[ 0.-1.j]', '[ 0.0-1.0j]',
'[ 0.+infj]', '[ 0.+infj]', '[ 0.0+infj]',
'[ 0.-infj]', '[ 0.-infj]', '[ 0.0-infj]',
'[ 0.+nanj]', '[ 0.+nanj]', '[ 0.0+nanj]',
'[ 1.+0.j]', '[ 1.+0.j]', '[ 1.0+0.0j]',
'[ 1.+1.j]', '[ 1.+1.j]', '[ 1.0+1.0j]',
'[ 1.-1.j]', '[ 1.-1.j]', '[ 1.0-1.0j]',
'[ 1.+infj]', '[ 1.+infj]', '[ 1.0+infj]',
'[ 1.-infj]', '[ 1.-infj]', '[ 1.0-infj]',
'[ 1.+nanj]', '[ 1.+nanj]', '[ 1.0+nanj]',
'[-1.+0.j]', '[-1.+0.j]', '[-1.0+0.0j]',
'[-1.+1.j]', '[-1.+1.j]', '[-1.0+1.0j]',
'[-1.-1.j]', '[-1.-1.j]', '[-1.0-1.0j]',
'[-1.+infj]', '[-1.+infj]', '[-1.0+infj]',
'[-1.-infj]', '[-1.-infj]', '[-1.0-infj]',
'[-1.+nanj]', '[-1.+nanj]', '[-1.0+nanj]',
'[ inf+0.j]', '[ inf+0.j]', '[ inf+0.0j]',
'[ inf+1.j]', '[ inf+1.j]', '[ inf+1.0j]',
'[ inf-1.j]', '[ inf-1.j]', '[ inf-1.0j]',
'[ inf+infj]', '[ inf+infj]', '[ inf+infj]',
'[ inf-infj]', '[ inf-infj]', '[ inf-infj]',
'[ inf+nanj]', '[ inf+nanj]', '[ inf+nanj]',
'[-inf+0.j]', '[-inf+0.j]', '[-inf+0.0j]',
'[-inf+1.j]', '[-inf+1.j]', '[-inf+1.0j]',
'[-inf-1.j]', '[-inf-1.j]', '[-inf-1.0j]',
'[-inf+infj]', '[-inf+infj]', '[-inf+infj]',
'[-inf-infj]', '[-inf-infj]', '[-inf-infj]',
'[-inf+nanj]', '[-inf+nanj]', '[-inf+nanj]',
'[ nan+0.j]', '[ nan+0.j]', '[ nan+0.0j]',
'[ nan+1.j]', '[ nan+1.j]', '[ nan+1.0j]',
'[ nan-1.j]', '[ nan-1.j]', '[ nan-1.0j]',
'[ nan+infj]', '[ nan+infj]', '[ nan+infj]',
'[ nan-infj]', '[ nan-infj]', '[ nan-infj]',
'[ nan+nanj]', '[ nan+nanj]', '[ nan+nanj]']
for res, val in zip(actual, wanted):
assert_(res == val)
class TestArray2String(TestCase):
def test_basic(self):
"""Basic test of array2string."""
a = np.arange(3)
assert_(np.array2string(a) == '[0 1 2]')
assert_(np.array2string(a, max_line_width=4) == '[0 1\n 2]')
def test_style_keyword(self):
"""This should only apply to 0-D arrays. See #1218."""
stylestr = np.array2string(np.array(1.5),
style=lambda x: "Value in 0-D array: " + str(x))
assert_(stylestr == 'Value in 0-D array: 1.5')
def test_format_function(self):
"""Test custom format function for each element in array."""
def _format_function(x):
if np.abs(x) < 1:
return '.'
elif np.abs(x) < 2:
return 'o'
else:
return 'O'
x = np.arange(3)
if sys.version_info[0] >= 3:
x_hex = "[0x0 0x1 0x2]"
x_oct = "[0o0 0o1 0o2]"
else:
x_hex = "[0x0L 0x1L 0x2L]"
x_oct = "[0L 01L 02L]"
assert_(np.array2string(x, formatter={'all':_format_function}) ==
"[. o O]")
assert_(np.array2string(x, formatter={'int_kind':_format_function}) ==
"[. o O]")
assert_(np.array2string(x, formatter={'all':lambda x: "%.4f" % x}) ==
"[0.0000 1.0000 2.0000]")
assert_equal(np.array2string(x, formatter={'int':lambda x: hex(x)}),
x_hex)
assert_equal(np.array2string(x, formatter={'int':lambda x: oct(x)}),
x_oct)
x = np.arange(3.)
assert_(np.array2string(x, formatter={'float_kind':lambda x: "%.2f" % x}) ==
"[0.00 1.00 2.00]")
assert_(np.array2string(x, formatter={'float':lambda x: "%.2f" % x}) ==
"[0.00 1.00 2.00]")
s = np.array(['abc', 'def'])
assert_(np.array2string(s, formatter={'numpystr':lambda s: s*2}) ==
'[abcabc defdef]')
def test_structure_format(self):
dt = np.dtype([('name', np.str_, 16), ('grades', np.float64, (2,))])
x = np.array([('Sarah', (8.0, 7.0)), ('John', (6.0, 7.0))], dtype=dt)
assert_equal(np.array2string(x),
"[('Sarah', [ 8., 7.]) ('John', [ 6., 7.])]")
# for issue #5692
A = np.zeros(shape=10, dtype=[("A", "M8[s]")])
A[5:].fill(np.datetime64('NaT'))
assert_equal(np.array2string(A),
"[('1970-01-01T00:00:00',) ('1970-01-01T00:00:00',) " +
"('1970-01-01T00:00:00',)\n ('1970-01-01T00:00:00',) " +
"('1970-01-01T00:00:00',) ('NaT',) ('NaT',)\n " +
"('NaT',) ('NaT',) ('NaT',)]")
# See #8160
struct_int = np.array([([1, -1],), ([123, 1],)], dtype=[('B', 'i4', 2)])
assert_equal(np.array2string(struct_int),
"[([ 1, -1],) ([123, 1],)]")
struct_2dint = np.array([([[0, 1], [2, 3]],), ([[12, 0], [0, 0]],)],
dtype=[('B', 'i4', (2, 2))])
assert_equal(np.array2string(struct_2dint),
"[([[ 0, 1], [ 2, 3]],) ([[12, 0], [ 0, 0]],)]")
# See #8172
array_scalar = np.array(
(1., 2.1234567890123456789, 3.), dtype=('f8,f8,f8'))
assert_equal(np.array2string(array_scalar), "( 1., 2.12345679, 3.)")
class TestPrintOptions:
"""Test getting and setting global print options."""
def setUp(self):
self.oldopts = np.get_printoptions()
def tearDown(self):
np.set_printoptions(**self.oldopts)
def test_basic(self):
x = np.array([1.5, 0, 1.234567890])
assert_equal(repr(x), "array([ 1.5 , 0. , 1.23456789])")
np.set_printoptions(precision=4)
assert_equal(repr(x), "array([ 1.5 , 0. , 1.2346])")
def test_precision_zero(self):
np.set_printoptions(precision=0)
for values, string in (
([0.], " 0."), ([.3], " 0."), ([-.3], "-0."), ([.7], " 1."),
([1.5], " 2."), ([-1.5], "-2."), ([-15.34], "-15."),
([100.], " 100."), ([.2, -1, 122.51], " 0., -1., 123."),
([0], "0"), ([-12], "-12"), ([complex(.3, -.7)], " 0.-1.j")):
x = np.array(values)
assert_equal(repr(x), "array([%s])" % string)
def test_formatter(self):
x = np.arange(3)
np.set_printoptions(formatter={'all':lambda x: str(x-1)})
assert_equal(repr(x), "array([-1, 0, 1])")
def test_formatter_reset(self):
x = np.arange(3)
np.set_printoptions(formatter={'all':lambda x: str(x-1)})
assert_equal(repr(x), "array([-1, 0, 1])")
np.set_printoptions(formatter={'int':None})
assert_equal(repr(x), "array([0, 1, 2])")
np.set_printoptions(formatter={'all':lambda x: str(x-1)})
assert_equal(repr(x), "array([-1, 0, 1])")
np.set_printoptions(formatter={'all':None})
assert_equal(repr(x), "array([0, 1, 2])")
np.set_printoptions(formatter={'int':lambda x: str(x-1)})
assert_equal(repr(x), "array([-1, 0, 1])")
np.set_printoptions(formatter={'int_kind':None})
assert_equal(repr(x), "array([0, 1, 2])")
x = np.arange(3.)
np.set_printoptions(formatter={'float':lambda x: str(x-1)})
assert_equal(repr(x), "array([-1.0, 0.0, 1.0])")
np.set_printoptions(formatter={'float_kind':None})
assert_equal(repr(x), "array([ 0., 1., 2.])")
def test_unicode_object_array():
import sys
if sys.version_info[0] >= 3:
expected = "array(['é'], dtype=object)"
else:
expected = "array([u'\\xe9'], dtype=object)"
x = np.array([u'\xe9'], dtype=object)
assert_equal(repr(x), expected)
if __name__ == "__main__":
run_module_suite()
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