pyqtgraph/tests/test_functions.py

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# -*- coding: utf-8 -*-
from collections import OrderedDict
from copy import deepcopy
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from contextlib import suppress
from pyqtgraph.functions import arrayToQPath, eq
import numpy as np
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import pytest
from numpy.testing import assert_array_almost_equal
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import pyqtgraph as pg
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np.random.seed(12345)
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def testSolve3D():
p1 = np.array([[0,0,0,1],
[1,0,0,1],
[0,1,0,1],
[0,0,1,1]], dtype=float)
# transform points through random matrix
tr = np.random.normal(size=(4, 4))
tr[3] = (0,0,0,1)
p2 = np.dot(tr, p1.T).T[:,:3]
# solve to see if we can recover the transformation matrix.
tr2 = pg.solve3DTransform(p1, p2)
assert_array_almost_equal(tr[:3], tr2[:3])
def test_interpolateArray_order0():
check_interpolateArray(order=0)
def test_interpolateArray_order1():
check_interpolateArray(order=1)
def check_interpolateArray(order):
def interpolateArray(data, x):
result = pg.interpolateArray(data, x, order=order)
assert result.shape == x.shape[:-1] + data.shape[x.shape[-1]:]
return result
data = np.array([[ 1., 2., 4. ],
[ 10., 20., 40. ],
[ 100., 200., 400.]])
# test various x shapes
interpolateArray(data, np.ones((1,)))
interpolateArray(data, np.ones((2,)))
interpolateArray(data, np.ones((1, 1)))
interpolateArray(data, np.ones((1, 2)))
interpolateArray(data, np.ones((5, 1)))
interpolateArray(data, np.ones((5, 2)))
interpolateArray(data, np.ones((5, 5, 1)))
interpolateArray(data, np.ones((5, 5, 2)))
with pytest.raises(TypeError):
interpolateArray(data, np.ones((3,)))
with pytest.raises(TypeError):
interpolateArray(data, np.ones((1, 3,)))
with pytest.raises(TypeError):
interpolateArray(data, np.ones((5, 5, 3,)))
x = np.array([[ 0.3, 0.6],
[ 1. , 1. ],
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[ 0.501, 1. ], # NOTE: testing at exactly 0.5 can yield different results from map_coordinates
[ 0.501, 2.501], # due to differences in rounding
[ 10. , 10. ]])
result = interpolateArray(data, x)
# make sure results match ndimage.map_coordinates
import scipy.ndimage
spresult = scipy.ndimage.map_coordinates(data, x.T, order=order)
#spresult = np.array([ 5.92, 20. , 11. , 0. , 0. ]) # generated with the above line
assert_array_almost_equal(result, spresult)
# test mapping when x.shape[-1] < data.ndim
x = np.array([[ 0.3, 0],
[ 0.3, 1],
[ 0.3, 2]])
r1 = interpolateArray(data, x)
x = np.array([0.3]) # should broadcast across axis 1
r2 = interpolateArray(data, x)
assert_array_almost_equal(r1, r2)
# test mapping 2D array of locations
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x = np.array([[[0.501, 0.501], [0.501, 1.0], [0.501, 1.501]],
[[1.501, 0.501], [1.501, 1.0], [1.501, 1.501]]])
r1 = interpolateArray(data, x)
r2 = scipy.ndimage.map_coordinates(data, x.transpose(2,0,1), order=order)
#r2 = np.array([[ 8.25, 11. , 16.5 ], # generated with the above line
#[ 82.5 , 110. , 165. ]])
Added Travis CI support Fixed bugs / style issues to please Lord Travis Squashed commit of the following: commit f25048a1e1e9d0be355f33fbaff6ef74845f4782 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Sun Mar 30 02:40:47 2014 -0400 syntax commit cc8b69695a2698b75ff216dce27fabe46c79a325 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Sun Mar 30 02:36:49 2014 -0400 add size check, diff style check commit 5d5ea065a4d4cc714bfaf7c7e7624295164cd86c Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Sun Mar 30 02:16:05 2014 -0400 travis fix commit b154c6d9971d35c2a46e575a0a884880ec14c8b1 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Sun Mar 30 02:09:41 2014 -0400 travis, flake colored output commit 46921dcd878fdc08f05ef74d08be7953b1820a85 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Wed Mar 26 12:37:54 2014 -0400 fix pyside+py3 bugs to satisfy CI commit 1d30f3c5c7763876ccfff54e460b83cb7422a5b4 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Wed Mar 26 11:13:18 2014 -0400 fix py3 tests commit 426578fa4c5ec991d361c60005c32ca88c85e505 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Wed Mar 26 07:39:19 2014 -0400 fix pytest install commit 88a13c1a7158904af7d25c5ba5bfc8e63e6cf49d Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Wed Mar 26 00:29:29 2014 -0400 qt5 updates commit 51995488ccc9f286aeced3bd49c3213819529e57 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Wed Mar 26 00:16:04 2014 -0400 correct py.test command for py3 commit e2b02fbcbdbd95cbec5dd9307870f39337e6eb45 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Tue Mar 25 23:50:38 2014 -0400 fix 2nd install test commit 4b3e3ee04adee3a8d1aabdfb18a198cbd0e83a06 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Tue Mar 25 23:31:31 2014 -0400 syntax error commit 250eabdb34cac48d6f9622e6453235f0ec7f1151 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Tue Mar 25 23:13:42 2014 -0400 look for py.test3 commit 9f9bca47c1a0a5c35be21835a674058242aa5f48 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Tue Mar 25 22:54:19 2014 -0400 fix syntax commit 0a871c6f36ecddb7a1002b74d3b6d433e1648e8f Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Tue Mar 25 22:47:58 2014 -0400 output pip build log commit dbce58d8cd3f3a558202f8d7a149b5ec8fbfcf78 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Tue Mar 25 22:38:55 2014 -0400 no comments allowed between shall lines commit b79c06121d8e40d8b2d2db0a4dd0a60fbf48edba Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Tue Mar 25 20:56:35 2014 -0400 another pip try commit 09f4f5d82ab41f66e5c746985f09dfcbe36f2089 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Tue Mar 25 13:36:09 2014 -0400 pip correction commit 0eedb5c18e7242370f996c6b7481fbcdc8e6caf2 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Tue Mar 25 13:29:00 2014 -0400 correct py version output commit d9fd039be22cb297f4de83f7ab543de25e2969dd Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Tue Mar 25 11:55:43 2014 -0400 apt checks commit cf95ccef86bd26964d73bdc649de8f23f64d2575 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Tue Mar 25 10:23:10 2014 -0400 alternate pip install method commit bee0bcddfef44917a5ee425557ba6ff246edec87 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 23:51:45 2014 -0400 correct deps install commit 963a4211fcaa5ebbfe0e13a5d879635bd77334ac Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 23:47:30 2014 -0400 fixes commit 0c86cd1dc28e286f999f01b37beb3c3252a8c864 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 23:31:06 2014 -0400 permission fix commit 5d04ef53b80a83aa62452ff9a9f9152ca862f8d8 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 23:30:19 2014 -0400 Fix py.test version selection commit b0e6c7cb94c7fa85653e492f8817e79b1ca30426 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 23:25:34 2014 -0400 try another pyqt5 install method commit 422a7928665b5afb72861400672cc81b4bcd9779 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 23:12:36 2014 -0400 syntax error commit 533133905a8e4f2ba26bc6e8f0e4fe631fbd119e Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 23:04:37 2014 -0400 fixes commit 8d65211ba4e08e4f4b13b68f9778c3aee4b43cdc Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 22:40:18 2014 -0400 Add Qt5 test minor fixes commit 4484efaefe0c99516940812d0472e82998e801f6 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 22:31:56 2014 -0400 use correct py.test for python version commit 5d2441a29b98ed573e15580fc5efd533352ffb45 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 22:24:27 2014 -0400 add setup tests commit 9291db64f25afeb46ee46d92b3bd13aabb325cfe Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 21:48:43 2014 -0400 fix py3-pyqt install commit a7aa675c5a5a5c4a2fff69feefc9298bcc626641 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 21:31:33 2014 -0400 travis tests commit e71cd2b23ab09490c29c1c8ee18fc4db87ff0c01 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 21:17:15 2014 -0400 more corrections commit 527df3bca897ba6a02cb3fe4a5a6db34042600b5 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 20:56:01 2014 -0400 travis corrections commit 87d65cac4aa3bf815860030fac78e8e28069e29d Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 20:48:02 2014 -0400 Add flake tests Correct style in a few files to please Lord Travis commit 537028f88f17da59a6e8a09b9a3dee34282791cf Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 17:36:24 2014 -0400 minimize pyside package install correct line endings to satisfy Lord Travis commit 1e3cc95e37f03f70f50900dcb2e8a4dc4772208a Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 17:23:03 2014 -0400 enable pyside, line ending check fix test commit d7df4517f9004399703cb44237d27be313405e84 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 17:12:06 2014 -0400 syntax fix commit 1ad77a21551c38f7ff77bd537eb6c2a9e13a26ae Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 17:00:30 2014 -0400 alt. pytest install commit 5edcc020729b1ecd452555852652720b4c3285f5 Author: Luke Campagnola <luke.campagnola@gmail.com> Date: Mon Mar 24 16:52:33 2014 -0400 Added initial travis.yml
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assert_array_almost_equal(r1, r2)
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def test_subArray():
a = np.array([0, 0, 111, 112, 113, 0, 121, 122, 123, 0, 0, 0, 211, 212, 213, 0, 221, 222, 223, 0, 0, 0, 0])
b = pg.subArray(a, offset=2, shape=(2,2,3), stride=(10,4,1))
c = np.array([[[111,112,113], [121,122,123]], [[211,212,213], [221,222,223]]])
assert np.all(b == c)
# operate over first axis; broadcast over the rest
aa = np.vstack([a, a/100.]).T
cc = np.empty(c.shape + (2,))
cc[..., 0] = c
cc[..., 1] = c / 100.
bb = pg.subArray(aa, offset=2, shape=(2,2,3), stride=(10,4,1))
assert np.all(bb == cc)
def test_rescaleData():
dtypes = map(np.dtype, ('ubyte', 'uint16', 'byte', 'int16', 'int', 'float'))
for dtype1 in dtypes:
for dtype2 in dtypes:
data = (np.random.random(size=10) * 2**32 - 2**31).astype(dtype1)
for scale, offset in [(10, 0), (10., 0.), (1, -50), (0.2, 0.5), (0.001, 0)]:
if dtype2.kind in 'iu':
lim = np.iinfo(dtype2)
lim = lim.min, lim.max
else:
lim = (-np.inf, np.inf)
s1 = np.clip(float(scale) * (data-float(offset)), *lim).astype(dtype2)
s2 = pg.rescaleData(data, scale, offset, dtype2)
assert s1.dtype == s2.dtype
if dtype2.kind in 'iu':
assert np.all(s1 == s2)
else:
assert np.allclose(s1, s2)
def test_eq():
eq = pg.functions.eq
zeros = [0, 0.0, np.float64(0), np.float32(0), np.int32(0), np.int64(0)]
for i,x in enumerate(zeros):
for y in zeros[i:]:
assert eq(x, y)
assert eq(y, x)
assert eq(np.nan, np.nan)
# test
class NotEq(object):
def __eq__(self, x):
return False
noteq = NotEq()
assert eq(noteq, noteq) # passes because they are the same object
assert not eq(noteq, NotEq())
# Should be able to test for equivalence even if the test raises certain
# exceptions
class NoEq(object):
def __init__(self, err):
self.err = err
def __eq__(self, x):
raise self.err
noeq1 = NoEq(AttributeError())
noeq2 = NoEq(ValueError())
noeq3 = NoEq(Exception())
assert eq(noeq1, noeq1)
assert not eq(noeq1, noeq2)
assert not eq(noeq2, noeq1)
with pytest.raises(Exception):
eq(noeq3, noeq2)
# test array equivalence
# note that numpy has a weird behavior here--np.all() always returns True
# if one of the arrays has size=0; eq() will only return True if both arrays
# have the same shape.
a1 = np.zeros((10, 20)).astype('float')
a2 = a1 + 1
a3 = a2.astype('int')
a4 = np.empty((0, 20))
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assert not eq(a1, a2) # same shape/dtype, different values
assert not eq(a1, a3) # same shape, different dtype and values
assert not eq(a1, a4) # different shape (note: np.all gives True if one array has size 0)
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assert not eq(a2, a3) # same values, but different dtype
assert not eq(a2, a4) # different shape
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assert not eq(a3, a4) # different shape and dtype
assert eq(a4, a4.copy())
assert not eq(a4, a4.T)
# test containers
assert not eq({'a': 1}, {'a': 1, 'b': 2})
assert not eq({'a': 1}, {'a': 2})
d1 = {'x': 1, 'y': np.nan, 3: ['a', np.nan, a3, 7, 2.3], 4: a4}
d2 = deepcopy(d1)
assert eq(d1, d2)
d1_ordered = OrderedDict(d1)
d2_ordered = deepcopy(d1_ordered)
assert eq(d1_ordered, d2_ordered)
assert not eq(d1_ordered, d2)
items = list(d1.items())
assert not eq(OrderedDict(items), OrderedDict(reversed(items)))
assert not eq([1,2,3], [1,2,3,4])
l1 = [d1, np.inf, -np.inf, np.nan]
l2 = deepcopy(l1)
t1 = tuple(l1)
t2 = tuple(l2)
assert eq(l1, l2)
assert eq(t1, t2)
assert eq(set(range(10)), set(range(10)))
assert not eq(set(range(10)), set(range(9)))
@pytest.mark.parametrize("s,suffix,expected", [
# usual cases
("100 uV", "V", ("100", "u", "V")),
("100 µV", "V", ("100", "µ", "V")),
("4.2 nV", None, ("4.2", "n", "V")),
("1.2 m", "m", ("1.2", "", "m")),
("1.2 m", None, ("1.2", "", "m")),
("5.0e9", None, ("5.0e9", "", "")),
("2 units", "units", ("2", "", "units")),
# siPrefix with explicit empty suffix
("1.2 m", "", ("1.2", "m", "")),
("5.0e-9 M", "", ("5.0e-9", "M", "")),
# weirder cases that should return the reasonable thing
("4.2 nV", "nV", ("4.2", "", "nV")),
("4.2 nV", "", ("4.2", "n", "")),
("1.2 j", "", ("1.2", "", "")),
("1.2 j", None, ("1.2", "", "j")),
# expected error cases
("100 uV", "v", ValueError),
])
def test_siParse(s, suffix, expected):
if isinstance(expected, tuple):
assert pg.siParse(s, suffix=suffix) == expected
else:
with pytest.raises(expected):
pg.siParse(s, suffix=suffix)
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MoveToElement = pg.QtGui.QPainterPath.ElementType.MoveToElement
LineToElement = pg.QtGui.QPainterPath.ElementType.LineToElement
@pytest.mark.parametrize(
"xs, ys, connect, expected", [
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(
np.arange(6), np.arange(0, -6, step=-1), 'all', (
(MoveToElement, 0.0, 0.0),
(LineToElement, 1.0, -1.0),
(LineToElement, 2.0, -2.0),
(LineToElement, 3.0, -3.0),
(LineToElement, 4.0, -4.0),
(LineToElement, 5.0, -5.0),
)
),
(
np.arange(6), np.arange(0, -6, step=-1), 'pairs', (
(MoveToElement, 0.0, 0.0),
(LineToElement, 1.0, -1.0),
(MoveToElement, 2.0, -2.0),
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(LineToElement, 3.0, -3.0),
(MoveToElement, 4.0, -4.0),
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(LineToElement, 5.0, -5.0),
)
),
(
np.arange(5), np.arange(0, -5, step=-1), 'pairs', (
(MoveToElement, 0.0, 0.0),
(LineToElement, 1.0, -1.0),
(MoveToElement, 2.0, -2.0),
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(LineToElement, 3.0, -3.0),
(MoveToElement, 4.0, -4.0)
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)
),
(
np.arange(5), np.array([0, -1, np.NaN, -3, -4]), 'finite', (
(MoveToElement, 0.0, 0.0),
(LineToElement, 1.0, -1.0),
(LineToElement, 1.0, -1.0),
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(MoveToElement, 3.0, -3.0),
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(LineToElement, 4.0, -4.0)
)
),
(
np.array([0, 1, np.NaN, 3, 4]), np.arange(0, -5, step=-1), 'finite', (
(MoveToElement, 0.0, 0.0),
(LineToElement, 1.0, -1.0),
(LineToElement, 1.0, -1.0),
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(MoveToElement, 3.0, -3.0),
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(LineToElement, 4.0, -4.0)
)
),
(
np.arange(5), np.arange(0, -5, step=-1), np.array([0, 1, 0, 1, 0]), (
(MoveToElement, 0.0, 0.0),
(MoveToElement, 1.0, -1.0),
(LineToElement, 2.0, -2.0),
(MoveToElement, 3.0, -3.0),
(LineToElement, 4.0, -4.0)
)
)
]
)
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def test_arrayToQPath(xs, ys, connect, expected):
path = arrayToQPath(xs, ys, connect=connect)
for i in range(path.elementCount()):
with suppress(NameError):
# nan elements add two line-segments, for simplicity of test config
# we can ignore the second segment
if (eq(element.x, np.nan) or eq(element.y, np.nan)):
continue
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element = path.elementAt(i)
assert eq(expected[i], (element.type, element.x, element.y))
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