def test_py4j_jar_environment_variable():
original = os.environ.get('PY4J_JAR', '')
# the file does not exist
os.environ['PY4J_JAR'] = __file__ + 'abc'
with pytest.raises(
OSError,
match=r'the full path to the py4j[\d.]+.jar file is invalid'):
loadlib.LoadLibrary(EXAMPLES_DIR + '/java_lib.jar')
# a valid folder, but expect a path to the py4j<version>.jar file
os.environ['PY4J_JAR'] = os.path.dirname(__file__)
with pytest.raises(
OSError,
match=r'the full path to the py4j[\d.]+.jar file is invalid'):
loadlib.LoadLibrary(EXAMPLES_DIR + '/java_lib.jar')
# a valid file but not a py4j<version>.jar file
os.environ['PY4J_JAR'] = __file__
with pytest.raises(
OSError,
match=r'the full path to the py4j[\d.]+.jar file is invalid'):
loadlib.LoadLibrary(EXAMPLES_DIR + '/java_lib.jar')
os.environ['PY4J_JAR'] = original
java = loadlib.LoadLibrary(EXAMPLES_DIR + '/java_lib.jar')
assert 0.0 <= java.lib.nz.msl.examples.MathUtils.random() < 1.0
java.gateway.shutdown()
def test_comtypes():
# changes to ctypes in Python 3.7.6 and 3.8.1 caused the following exception
# TypeError: item 1 in _argtypes_ passes a union by value, which is unsupported.
# when loading some COM objects, see https://bugs.python.org/issue16575
#
# The 'MediaPlayer.MediaPlayer.1' object does not appear to raise this exception
# and the goal of this test function is not to test the internals of comtypes
# but LoadLibrary calling the underlying comtypes wrapper properly
progid = 'MediaPlayer.MediaPlayer.1'
obj = loadlib.LoadLibrary(progid, 'com')
# don't care whether it is enabled, just that a boolean is returned
assert isinstance(obj.lib.IsSoundCardEnabled(), bool)
with pytest.raises(OSError):
loadlib.LoadLibrary('ABC.def.GHI', 'com')
info = loadlib.utils.get_com_info()
assert info, 'utils.get_com_info() returned an empty dict'
found_it = False
for key, value in info.items():
if value['ProgID'] == progid:
# don't need to specify libtype='com' since the `key`
# startswith "{" and endswith "}" which is unique to a COM library
obj = loadlib.LoadLibrary(key)
assert isinstance(obj.lib.IsSoundCardEnabled(), bool)
found_it = True
break
assert found_it, 'did not find %s in utils.get_com_info() dict' % progid
def test_pathlib_object():
# checks that Issue #8 is fixed
if loadlib.IS_PYTHON_64BIT:
loadlib.LoadLibrary(
pathlib.Path(os.path.join(EXAMPLES_DIR, 'cpp_lib64')))
else:
loadlib.LoadLibrary(
pathlib.Path(os.path.join(EXAMPLES_DIR, 'cpp_lib32')))
def test_labview():
from ctypes import c_double, byref
if loadlib.IS_PYTHON_64BIT:
path = EXAMPLES_DIR + '/labview_lib64.dll'
else:
path = EXAMPLES_DIR + '/labview_lib32.dll'
labview = loadlib.LoadLibrary(path)
data = [1, 2, 3, 4, 5, 6, 7, 8, 9]
x = (c_double * len(data))(*data)
mean, variance, stdev = c_double(), c_double(), c_double()
# weighting to use: 0 -> sample, 1-> population
labview.lib.stdev(x, len(data), 0, byref(mean), byref(variance),
byref(stdev))
assert mean.value == pytest.approx(5.0)
assert variance.value == pytest.approx(7.5)
assert stdev.value == pytest.approx(2.73861278752583)
labview.lib.stdev(x, len(data), 1, byref(mean), byref(variance),
byref(stdev))
assert mean.value == pytest.approx(5.0)
assert variance.value == pytest.approx(6.66666666666667)
assert stdev.value == pytest.approx(2.58198889747161)
def test_unicode_path_java():
cls = loadlib.LoadLibrary(u'./tests/uñicödé/Trig.class')
x = 0.123456
assert cls.lib.Trig.cos(x) == pytest.approx(math.cos(x))
repr(cls) # this should not raise an exception
str(cls) # this should not raise an exception
cls.gateway.shutdown()
def test_wrong_bitness(filename):
suffix = '32' if loadlib.IS_PYTHON_64BIT else '64'
path = os.path.join(EXAMPLES_DIR,
filename + suffix + loadlib.DEFAULT_EXTENSION)
assert os.path.isfile(path)
with pytest.raises(OSError):
loadlib.LoadLibrary(path)
def test_comtypes():
obj = loadlib.LoadLibrary('Scripting.FileSystemObject', 'com')
assert hasattr(obj.lib, 'CreateTextFile')
obj = None
with pytest.raises(OSError):
loadlib.LoadLibrary('ABC.def.GHI', 'com')
info = loadlib.utils.get_com_info()
for key, value in info.items():
if value['ProgID'] == 'Scripting.FileSystemObject':
# don't need to specify libtype='com' since the `path`
# argument startswith "{" and endswith "}"
obj = loadlib.LoadLibrary(key)
assert hasattr(obj.lib, 'CreateTextFile')
obj = None
break
def check(path, libtype, exception):
if libtype == 'net':
path += '.dll'
else:
path += loadlib.DEFAULT_EXTENSION
assert os.path.isfile(path)
if loadlib.IS_WINDOWS or libtype != 'net':
with pytest.raises(exception):
loadlib.LoadLibrary(path, libtype=libtype)
elif loadlib.IS_LINUX and libtype == 'net':
# Mono can load a 32/64 bit library in 64/32 bit Python
net = loadlib.LoadLibrary(path, libtype=libtype)
math = net.lib.DotNetMSL.BasicMath()
assert 9 == math.add_integers(4, 5)
else:
raise NotImplementedError
def test_unicode_path_dotnet():
net = loadlib.LoadLibrary(
u'./tests/uñicödé/Namespace.With.Dots-uñicödé.dll', 'net')
checker = net.lib.Namespace.With.Dots.Checker()
assert checker.IsSuccess()
repr(net) # this should not raise an exception
str(net) # this should not raise an exception
net.cleanup()
def test_wrong_bitness_dotnet():
import clr
import System
suffix = '32' if loadlib.IS_PYTHON_64BIT else '64'
path = os.path.join(EXAMPLES_DIR, 'dotnet_lib' + suffix + '.dll')
assert os.path.isfile(path)
with pytest.raises(System.BadImageFormatException):
loadlib.LoadLibrary(path, libtype='net')
def test_activex_raises():
from msl.loadlib.activex import Application
with pytest.raises(OSError,
match=r"Cannot find 'ABC' for libtype='activex'"):
loadlib.LoadLibrary('ABC', 'activex')
with pytest.raises(OSError,
match=r"Cannot find 'ABC' for libtype='activex'"):
Application.load('ABC')
progid = 'MediaPlayer.MediaPlayer.1'
for item in [0, [], 'xxx']:
with pytest.raises(OSError, match=r'Cannot create a Handle'):
loadlib.LoadLibrary(progid, 'activex', parent=item)
with pytest.raises(OSError, match=r'Cannot create a Handle'):
Application.load(progid, parent=item)
def test_issue7():
# checks that Issue #7 is fixed
net = loadlib.LoadLibrary(
'./tests/namespace_with_dots/Namespace.With.Dots.dll', 'net')
checker = net.lib.Namespace.With.Dots.Checker()
assert checker.IsSuccess()
repr(
net
) # test that the __repr__ and __str__ methods don't raise an exception
str(net)
def test_namespace_with_dots():
# checks that Issue #7 is fixed
net = loadlib.LoadLibrary(
'./tests/namespace_with_dots/Namespace.With.Dots.dll', 'net')
checker = net.lib.Namespace.With.Dots.Checker()
assert checker.IsSuccess()
repr(
net
) # test that the __repr__ and __str__ methods work for a non-unicode path
str(net)
def test_unicode_path():
cls = loadlib.LoadLibrary(u'./tests/uñicödé/Trig.class')
import math
x = 0.123456
assert cls.lib.Trig.cos(x) == pytest.approx(math.cos(x))
repr(cls) # this should not raise an exception
str(cls) # this should not raise an exception
cls.gateway.shutdown()
if (loadlib.IS_MAC or loadlib.IS_LINUX) and sys.version_info[:2] == (3, 8):
# get fatal crash on MacOS & Python 3.8 when importing pythonnet
pass
else:
net = loadlib.LoadLibrary(
u'./tests/uñicödé/Namespace.With.Dots-uñicödé.dll', 'net')
checker = net.lib.Namespace.With.Dots.Checker()
assert checker.IsSuccess()
repr(net) # this should not raise an exception
str(net) # this should not raise an exception
# IMPORTANT: keep the C++ test after loading the unicode version of the .NET DLL
# because it tests for additional problems that can occur.
# When the unicode version of .NET is loaded the `head` gets appended to sys.path, i.e.,
# # the shared library must be available in sys.path
# head, tail = os.path.split(self._path)
# if IS_PYTHON2:
# head = head.decode(_encoding) <- this is important
# sys.path.append(head)
# Without doing head.decode(_encoding) then when loading the unicode version of the C++ DLL
# the following error occurred:
# UnicodeDecodeError: 'ascii' codec can't decode byte 0xf1 in position 29: ordinal not in range(128)
# This happens because when doing the search for the unicode version of the C++ DLL in Python 2.7, i.e.,
# search_dirs = sys.path + os.environ['PATH'].split(os.pathsep)
# for directory in search_dirs:
# p = os.path.join(directory, _path) <- raised UnicodeDecodeError
# the `directory` equaled the encoded version of `head` and so it raised UnicodeDecodeError
sys.path.append(u'./tests/uñicödé')
bitness = u'64' if loadlib.IS_PYTHON_64BIT else u'32'
cpp = loadlib.LoadLibrary(u'cpp_lib' + bitness + u'-uñicödé')
assert cpp.lib.add(1, 2) == 3
repr(cpp) # this should not raise an exception
str(cpp) # this should not raise an exception
def test_dotnet():
bitness = '64' if loadlib.IS_PYTHON_64BIT else '32'
path = os.path.join(EXAMPLES_DIR, 'dotnet_lib' + bitness + '.dll')
net = loadlib.LoadLibrary(path, 'clr')
names = ';'.join(str(name) for name in net.assembly.GetTypes()).split(';')
assert len(names) == 4
assert 'StringManipulation' in names
assert 'DotNetMSL.BasicMath' in names
assert 'DotNetMSL.ArrayManipulation' in names
assert 'StaticClass' in names
BasicMath = net.lib.DotNetMSL.BasicMath()
assert 9 == BasicMath.add_integers(4, 5)
assert 0.8 == pytest.approx(BasicMath.divide_floats(4., 5.))
assert 458383.926 == pytest.approx(
BasicMath.multiply_doubles(872.24, 525.525))
assert 108.0 == pytest.approx(BasicMath.add_or_subtract(99., 9., True))
assert 90.0 == pytest.approx(BasicMath.add_or_subtract(99., 9., False))
ArrayManipulation = net.lib.DotNetMSL.ArrayManipulation()
a = 7.13141
values = [float(x) for x in range(1000)]
net_values = ArrayManipulation.scalar_multiply(a, values)
for i in range(len(values)):
assert a * values[i] == pytest.approx(net_values[i])
a1 = [[1., 2., 3.], [4., 5., 6.]]
m1 = net.lib.System.Array.CreateInstance(net.lib.System.Double, 2, 3)
for r in range(2):
for c in range(3):
m1[r, c] = a1[r][c]
a2 = [[1., 2.], [3., 4.], [5., 6.]]
m2 = net.lib.System.Array.CreateInstance(net.lib.System.Double, 3, 2)
for r in range(3):
for c in range(2):
m2[r, c] = a2[r][c]
out = ArrayManipulation.multiply_matrices(m1, m2)
net_mat = [[out[r, c] for c in range(2)] for r in range(2)]
assert 22.0 == pytest.approx(net_mat[0][0])
assert 28.0 == pytest.approx(net_mat[0][1])
assert 49.0 == pytest.approx(net_mat[1][0])
assert 64.0 == pytest.approx(net_mat[1][1])
assert 'dnalaeZ weN' == net.lib.StringManipulation().reverse_string(
'New Zealand')
assert net.lib.StaticClass.add_multiple(11, -22, 33, -44, 55) == 33
assert net.lib.StaticClass.concatenate('a', 'b', 'c', False, 'd') == 'abc'
assert net.lib.StaticClass.concatenate('a', 'b', 'c', True, 'd') == 'abcd'
net.cleanup()
def test_dotnet_nested_namespace():
lib = loadlib.LoadLibrary(
'./tests/nested_namespaces/nested_namespaces.dll', 'clr').lib
from math import pi
assert lib.System.Math.PI == pytest.approx(pi)
assert lib.A.B.C.Klass().Message() == 'Hello from A.B.C.Klass().Message()'
assert lib.A.B.Klass().Message() == 'Hello from A.B.Klass().Message()'
assert lib.A.Klass().Message() == 'Hello from A.Klass().Message()'
assert lib.Messenger().Message() == 'Hello from Messenger.Message()'
assert lib.Foo.Bar.Baz(
'my custom message!').Message() == 'my custom message!'
assert lib.Foo.Bar.Baz('abc 123').message == 'abc 123'
# an enum in a namespace
assert lib.A.B.C.ErrorCode.Unknown == 0
assert lib.A.B.C.ErrorCode.ConnectionLost == 100
assert lib.A.B.C.ErrorCode.OutlierReading == 200
# an enum not in a namespace
assert lib.Season.Winter == 0
assert lib.Season.Spring == 1
assert lib.Season.Summer == 2
assert lib.Season.Autumn == 3
Subtracter = lib.A.B.C.Subtracter(8, 9)
assert Subtracter.x == 8
assert Subtracter.y == 9
assert Subtracter.Subtract() == -1
# Adder is not defined as a public class but can still be created
Adder = lib.System.Activator.CreateInstance(lib.Adder, [82, -27])
assert Adder.Add() == 55
assert Adder.x == 82
assert Adder.y == -27
def test_load_failure_in_32bit_python():
if not loadlib.IS_PYTHON_64BIT:
with pytest.raises(IOError):
loadlib.LoadLibrary(os.path.join('.', 'examples', 'cpp_lib64'))
with pytest.raises(IOError):
loadlib.LoadLibrary(os.path.join('.', 'examples', 'fortran_lib64'))
def test_invalid_libtype():
with pytest.raises(TypeError):
loadlib.LoadLibrary(os.path.join(EXAMPLES_DIR, 'cpp_lib64'),
libtype='xxxxxxxx')
def test_unicode_path_cpp():
bitness = u'64' if loadlib.IS_PYTHON_64BIT else u'32'
cpp = loadlib.LoadLibrary(u'cpp_lib' + bitness + u'-uñicödé')
assert cpp.lib.add(1, 2) == 3
repr(cpp) # this should not raise an exception
str(cpp) # this should not raise an exception
def test_dotnet_nested_namespace():
net = loadlib.LoadLibrary(
'./tests/nested_namespaces/nested_namespaces.dll', 'clr')
lib = net.lib
assert lib.System.Math.PI == pytest.approx(math.pi)
assert lib.A.B.C.Klass().Message() == 'Hello from A.B.C.Klass().Message()'
assert lib.A.B.Klass().Message() == 'Hello from A.B.Klass().Message()'
assert lib.A.Klass().Message() == 'Hello from A.Klass().Message()'
assert lib.Messenger().Message() == 'Hello from Messenger.Message()'
assert lib.Foo.Bar.Baz(
'my custom message!').Message() == 'my custom message!'
assert lib.Foo.Bar.Baz('abc 123').message == 'abc 123'
# pythonnet 3.0+ disabled implicit conversion from C# enums to Python int and back.
# One must now either use enum members (e.g. MyEnum.Option), or use enum constructor
# (e.g. MyEnum(42) or MyEnum(42, True) when MyEnum does not have a member with value 42).
import clr
if int(clr.__version__.split('.')[0]) < 3:
# an enum in a namespace
assert lib.A.B.C.ErrorCode.Unknown == 0
assert lib.A.B.C.ErrorCode.ConnectionLost == 100
assert lib.A.B.C.ErrorCode.OutlierReading == 200
# an enum not in a namespace
assert lib.Season.Winter == 0
assert lib.Season.Spring == 1
assert lib.Season.Summer == 2
assert lib.Season.Autumn == 3
else:
# an enum in a namespace
assert lib.A.B.C.ErrorCode.Unknown == lib.A.B.C.ErrorCode(0)
assert lib.A.B.C.ErrorCode.ConnectionLost == lib.A.B.C.ErrorCode(100)
assert lib.A.B.C.ErrorCode.OutlierReading == lib.A.B.C.ErrorCode(200)
# an enum not in a namespace
assert lib.Season.Winter == lib.Season(0)
assert lib.Season.Spring == lib.Season(1)
assert lib.Season.Summer == lib.Season(2)
assert lib.Season.Autumn == lib.Season(3)
Subtracter = lib.A.B.C.Subtracter(8, 9)
assert Subtracter.x == 8
assert Subtracter.y == 9
assert Subtracter.Subtract() == -1
# Adder is not defined as a public class but can still be created
Adder = lib.System.Activator.CreateInstance(lib.Adder,
lib.System.Int32(82),
lib.System.Int32(-27))
assert Adder.Add() == 55
assert Adder.x == 82
assert Adder.y == -27
# a struct in a nested namespace
point = lib.A.B.C.Point(0, 0)
assert point.X == 0
assert point.Y == 0
assert point.ToString() == 'Point<X=0, Y=0>'
point.X = 73
point.Y = -21
assert point.ToString() == 'Point<X=73, Y=-21>'
point = lib.A.B.C.Point(-3, 54)
assert point.X == -3
assert point.Y == 54
assert point.ToString() == 'Point<X=-3, Y=54>'
# a struct not in a namespace
point = lib.Point(123, 456)
assert point.X == 123
assert point.Y == 456
# still need to create the instance in Python
StructWithoutConstructor = lib.StructWithoutConstructor()
assert StructWithoutConstructor.X == 0
assert StructWithoutConstructor.Y == 0
StructWithoutConstructor.X = 1
StructWithoutConstructor.Y = -1
assert StructWithoutConstructor.X == 1
assert StructWithoutConstructor.Y == -1
net.cleanup()
def test_raises_ValueError():
with pytest.raises(ValueError):
loadlib.LoadLibrary(None)
with pytest.raises(ValueError):
loadlib.LoadLibrary('')
def test_java():
jar = loadlib.LoadLibrary(EXAMPLES_DIR + '/java_lib.jar')
Math = jar.lib.nz.msl.examples.MathUtils
Matrix = jar.lib.nz.msl.examples.Matrix
assert 0.0 <= Math.random() < 1.0
assert abs(Math.sqrt(32.4) - 5.69209978830308) < eps
#
# check LU decomposition
#
n = 14
m1 = Matrix(n, n, 2.0, 8.0)
L = m1.getL()
U = m1.getU()
LU = m1.multiply(L, U)
for i in range(n):
for j in range(n):
assert abs(m1.getValue(i, j) - LU.getValue(i, j)) < eps
#
# check QR decomposition
#
n = 8
m2 = Matrix(n, n, -100.0, 100.0)
Q = m2.getQ()
R = m2.getR()
QR = m2.multiply(Q, R)
for i in range(n):
for j in range(n):
assert abs(m2.getValue(i, j) - QR.getValue(i, j)) < eps
#
# solve Ax=b
#
m3 = jar.gateway.new_array(jar.lib.Double, 3, 3)
m3[0][0] = 3.
m3[0][1] = 2.
m3[0][2] = -1.
m3[1][0] = 2.
m3[1][1] = -2.
m3[1][2] = 4.
m3[2][0] = -1.0
m3[2][1] = 0.5
m3[2][2] = 1.0
m4 = jar.gateway.new_array(jar.lib.Double, 3)
m4[0] = 1.0
m4[1] = -2.0
m4[2] = 0.0
A = Matrix(m3)
x = Matrix.solve(A, Matrix(m4))
bprime = Matrix.multiply(A, x)
for i in range(3):
assert abs(bprime.getValue(i, 0) - m4[i]) < eps
#
# Check inverse
#
n = 30
m5 = Matrix(n, n, 0.0, 100.0)
m6 = m5.getInverse()
m7 = Matrix.multiply(m5, m6)
identity = Matrix(n)
for i in range(n):
for j in range(n):
assert abs(identity.getValue(i, j) - m7.getValue(i, j)) < eps
#
# Check determinant
#
a = [[6, 1, 1], [4, -2, 5], [2, 8, 7]]
ja = jar.gateway.new_array(jar.lib.Double, 3, 3)
for i in range(3):
for j in range(3):
ja[i][j] = float(a[i][j])
m8 = Matrix(ja)
assert abs(m8.getDeterminant() - (-306)) < eps
jar.gateway.shutdown()
import math
cls = loadlib.LoadLibrary(EXAMPLES_DIR + '/Trig.class')
Trig = cls.lib.Trig
x = 0.123456
assert abs(Trig.cos(x) - math.cos(x)) < eps
assert abs(Trig.cosh(x) - math.cosh(x)) < eps
assert abs(Trig.acos(x) - math.acos(x)) < eps
assert abs(Trig.sin(x) - math.sin(x)) < eps
assert abs(Trig.sinh(x) - math.sinh(x)) < eps
assert abs(Trig.asin(x) - math.asin(x)) < eps
assert abs(Trig.tan(x) - math.tan(x)) < eps
assert abs(Trig.tanh(x) - math.tanh(x)) < eps
assert abs(Trig.atan(x) - math.atan(x)) < eps
assert abs(Trig.atan2(-4.321, x) - math.atan2(-4.321, x)) < eps
cls.gateway.shutdown()
def test_unicode_path():
cls = loadlib.LoadLibrary(u'./tests/uñicödé/Trig.class')
import math
x = 0.123456
assert abs(cls.lib.Trig.cos(x) - math.cos(x)) < eps
repr(cls)
str(cls)
cls.gateway.shutdown()
net = loadlib.LoadLibrary(
u'./tests/uñicödé/Namespace.With.Dots-uñicödé.dll', 'net')
checker = net.lib.Namespace.With.Dots.Checker()
assert checker.IsSuccess()
repr(net)
str(net)
# IMPORTANT: keep the C++ test after loading the unicode version of the .NET DLL
# because it tests for additional problems that can occur.
# When the unicode version of .NET is loaded the `head` gets appended to sys.path, i.e.,
# # the shared library must be available in sys.path
# head, tail = os.path.split(self._path)
# if IS_PYTHON2:
# head = head.decode(_encoding) <- this is important
# sys.path.append(head)
# Without doing head.decode(_encoding) then when loading the unicode version of the C++ DLL
# the following error occurred:
# UnicodeDecodeError: 'ascii' codec can't decode byte 0xf1 in position 29: ordinal not in range(128)
# This happens because when doing the search for the unicode version of the C++ DLL in Python 2.7, i.e.,
# search_dirs = sys.path + os.environ['PATH'].split(os.pathsep)
# for directory in search_dirs:
# p = os.path.join(directory, _path) <- raised UnicodeDecodeError
# the `directory` equaled the encoded version of `head` and so it raised UnicodeDecodeError
sys.path.append(u'./tests/uñicödé')
bit = u'64' if loadlib.IS_PYTHON_64BIT else u'32'
cpp = loadlib.LoadLibrary(u'cpp_lib' + bit + u'-uñicödé')
assert cpp.lib.add(1, 2) == 3
repr(cpp)
str(cpp)
class Cpp64Encoding(loadlib.Client64):
def __init__(self):
super(Cpp64Encoding, self).__init__(
module32='cpp32unicode',
append_sys_path=os.path.dirname(__file__) + u'/uñicödé',
append_environ_path=os.path.dirname(__file__) + u'/uñicödé',
)
def add(self, a, b):
return self.request32('add', a, b)
c2 = Cpp64Encoding()
assert c2.add(-5, 3) == -2
with pytest.raises(loadlib.Server32Error):
c2.add('hello', 'world')
try:
c2.add('hello', 'world')
except loadlib.Server32Error as e:
print(e)
c2.shutdown_server32()
def test_fortran():
bitness = '64' if loadlib.IS_PYTHON_64BIT else '32'
path = os.path.join(EXAMPLES_DIR, 'fortran_lib' + bitness)
fortran = loadlib.LoadLibrary(path)
lib = fortran.lib
lib.sum_8bit.argtypes = [POINTER(c_int8), POINTER(c_int8)]
lib.sum_8bit.restype = c_int8
lib.sum_16bit.argtypes = [POINTER(c_int16), POINTER(c_int16)]
lib.sum_16bit.restype = c_int16
lib.sum_32bit.argtypes = [POINTER(c_int32), POINTER(c_int32)]
lib.sum_32bit.restype = c_int32
lib.sum_64bit.argtypes = [POINTER(c_int64), POINTER(c_int64)]
lib.sum_64bit.restype = c_int64
lib.multiply_float32.argtypes = [POINTER(c_float), POINTER(c_float)]
lib.multiply_float32.restype = c_float
lib.multiply_float64.argtypes = [POINTER(c_double), POINTER(c_double)]
lib.multiply_float64.restype = c_double
lib.is_positive.argtypes = [POINTER(c_double)]
lib.is_positive.restype = c_bool
lib.add_or_subtract.argtypes = [
POINTER(c_int32), POINTER(c_int32),
POINTER(c_bool)
]
lib.add_or_subtract.restype = c_int32
lib.factorial.argtypes = [POINTER(c_int8)]
lib.factorial.restype = c_double
lib.standard_deviation.argtypes = [POINTER(c_double), POINTER(c_int32)]
lib.standard_deviation.restype = c_double
lib.besselj0.argtypes = [POINTER(c_double)]
lib.besselj0.restype = c_double
lib.reverse_string.argtypes = [c_char_p, POINTER(c_int32), c_char_p]
lib.reverse_string.restype = None
lib.add_1d_arrays.argtypes = [
POINTER(c_double),
POINTER(c_double),
POINTER(c_double),
POINTER(c_int32)
]
lib.add_1d_arrays.restype = None
lib.matrix_multiply.argtypes = [
c_void_p, c_void_p,
POINTER(c_int32),
POINTER(c_int32), c_void_p,
POINTER(c_int32),
POINTER(c_int32)
]
lib.matrix_multiply.restype = None
assert -127 == lib.sum_8bit(byref(c_int8(-2**7)), byref(c_int8(1)))
assert 32766 == lib.sum_16bit(byref(c_int16(2**15 - 1)),
byref(c_int16(-1)))
assert 123456789 == lib.sum_32bit(byref(c_int32(123456788)),
byref(c_int32(1)))
assert -9223372036854775807 == lib.sum_64bit(byref(c_int64(-2**63)),
byref(c_int64(1)))
assert -52487.570494 == pytest.approx(
lib.multiply_float32(byref(c_float(40.874)),
byref(c_float(-1284.131))))
assert 2.31e300 == pytest.approx(
lib.multiply_float64(byref(c_double(1.1e100)),
byref(c_double(2.1e200))))
assert lib.is_positive(byref(c_double(1e-100)))
assert not lib.is_positive(byref(c_double(-1e-100)))
assert 3000 == lib.add_or_subtract(byref(c_int32(1000)),
byref(c_int32(2000)),
byref(c_bool(True)))
assert -1000 == lib.add_or_subtract(byref(c_int32(1000)),
byref(c_int32(2000)),
byref(c_bool(False)))
assert 1 == int(lib.factorial(byref(c_int8(0))))
assert 1 == int(lib.factorial(byref(c_int8(1))))
assert 120 == int(lib.factorial(byref(c_int8(5))))
a = (c_double * 9)(*[float(val) for val in range(1, 10)])
assert 2.73861278752583 == pytest.approx(
lib.standard_deviation(a, byref(c_int32(9))))
assert 0.171650807137 == pytest.approx(lib.besselj0(byref(c_double(8.0))))
str_in = 'hello world!'
str_out = create_string_buffer(len(str_in))
lib.reverse_string(create_string_buffer(str_in.encode()),
byref(c_int32(len(str_in))), str_out)
assert '!dlrow olleh' == str_out.raw.decode()
in1 = (c_double * 999)(*[float(val) for val in range(1, 1000)])
in2 = (c_double * 999)(*[3.0 * val for val in range(1, 1000)])
assert len(in1) == len(in2)
a = (c_double * len(in1))()
lib.add_1d_arrays(a, in1, in2, byref(c_int32(len(in1))))
for i in range(len(a)):
assert in1[i] + in2[i] == pytest.approx(a[i])
m1 = [[1., 2., 3.], [4., 5., 6.]]
a1 = ((c_double * 2) * 3)()
for r in range(2):
for c in range(3):
a1[c][r] = m1[r][c]
m2 = [[1., 2.], [3., 4.], [5., 6.]]
a2 = ((c_double * 3) * 2)()
for r in range(3):
for c in range(2):
a2[c][r] = m2[r][c]
a = ((c_double * 2) * 2)()
lib.matrix_multiply(a, a1, byref(c_int32(2)), byref(c_int32(3)), a2,
byref(c_int32(3)), byref(c_int32(2)))
assert 22.0 == pytest.approx(a[0][0])
assert 49.0 == pytest.approx(a[0][1])
assert 28.0 == pytest.approx(a[1][0])
assert 64.0 == pytest.approx(a[1][1])
def test_namespace_with_dots():
# checks that Issue #7 is fixed
net = loadlib.LoadLibrary(
'./tests/namespace_with_dots/Namespace.With.Dots.dll', 'net')
checker = net.lib.Namespace.With.Dots.Checker()
assert checker.IsSuccess()
def test_cpp():
bitness = '64' if loadlib.IS_PYTHON_64BIT else '32'
path = os.path.join(EXAMPLES_DIR, 'cpp_lib' + bitness)
cpp = loadlib.LoadLibrary(path)
lib = cpp.lib
lib.add.argtypes = [c_int, c_int]
lib.add.restype = c_int
lib.subtract.argtypes = [c_float, c_float]
lib.subtract.restype = c_float
lib.add_or_subtract.argtypes = [c_double, c_double, c_bool]
lib.add_or_subtract.restype = c_double
lib.scalar_multiply.argtypes = [
c_double, POINTER(c_double), c_int,
POINTER(c_double)
]
lib.scalar_multiply.restype = None
lib.reverse_string_v1.argtypes = [c_char_p, c_int, c_char_p]
lib.reverse_string_v1.restype = None
lib.reverse_string_v2.argtypes = [c_char_p, c_int]
lib.reverse_string_v2.restype = c_char_p
lib.distance_4_points.argtypes = [FourPoints]
lib.distance_4_points.restype = c_double
lib.distance_n_points.argtypes = [NPoints]
lib.distance_n_points.restype = c_double
assert 3 == lib.add(1, 2)
assert -1002 == lib.add(-1000, -2)
assert 10.0 == pytest.approx(lib.subtract(20.0, 10.0))
assert -10.0 == pytest.approx(lib.subtract(90.0, 100.0))
assert 0.0 == pytest.approx(lib.add_or_subtract(0.1234, -0.1234, True))
assert 100.0 == pytest.approx(lib.add_or_subtract(123.456, 23.456, False))
n = 100
a = 3.1415926
values = (c_double * n)(*tuple(x for x in range(n)))
out = (c_double * n)()
lib.scalar_multiply(a, values, n, out)
for i in range(n):
assert a * values[i] == pytest.approx(out[i])
str_in = '1234567890'
str_out = create_string_buffer(len(str_in))
lib.reverse_string_v1(create_string_buffer(str_in.encode()), len(str_in),
str_out)
assert '0987654321' == str_out.raw.decode()
str_in = '&* 1 j z|x cba['
str_out = lib.reverse_string_v2(create_string_buffer(str_in.encode()),
len(str_in))
# ignore testing for null termination on different platforms
assert '[abc x|z j 1 *&' == str_out[:len(str_in)].decode()
fp = FourPoints((0, 0), (0, 1), (1, 1), (1, 0))
assert lib.distance_4_points(fp) == pytest.approx(4.0)
n = 2**16
theta = 0.0
delta = (2.0 * math.pi) / float(n)
pts = NPoints()
pts.n = n
pts.points = (Point * n)()
for i in range(n):
pts.points[i] = Point(math.cos(theta), math.sin(theta))
theta += delta
assert lib.distance_n_points(pts) == pytest.approx(2.0 * math.pi)
def test_dotnet_nested_namespace():
lib = loadlib.LoadLibrary(
'./tests/nested_namespaces/nested_namespaces.dll', 'clr').lib
from math import pi
assert lib.System.Math.PI == pytest.approx(pi)
assert lib.A.B.C.Klass().Message() == 'Hello from A.B.C.Klass().Message()'
assert lib.A.B.Klass().Message() == 'Hello from A.B.Klass().Message()'
assert lib.A.Klass().Message() == 'Hello from A.Klass().Message()'
assert lib.Messenger().Message() == 'Hello from Messenger.Message()'
assert lib.Foo.Bar.Baz(
'my custom message!').Message() == 'my custom message!'
assert lib.Foo.Bar.Baz('abc 123').message == 'abc 123'
# an enum in a namespace
assert lib.A.B.C.ErrorCode.Unknown == 0
assert lib.A.B.C.ErrorCode.ConnectionLost == 100
assert lib.A.B.C.ErrorCode.OutlierReading == 200
# an enum not in a namespace
assert lib.Season.Winter == 0
assert lib.Season.Spring == 1
assert lib.Season.Summer == 2
assert lib.Season.Autumn == 3
Subtracter = lib.A.B.C.Subtracter(8, 9)
assert Subtracter.x == 8
assert Subtracter.y == 9
assert Subtracter.Subtract() == -1
# Adder is not defined as a public class but can still be created
Adder = lib.System.Activator.CreateInstance(lib.Adder, [82, -27])
assert Adder.Add() == 55
assert Adder.x == 82
assert Adder.y == -27
# a struct in a nested namespace
point = lib.A.B.C.Point()
assert point.X == 0
assert point.Y == 0
assert point.ToString() == 'Point<X=0, Y=0>'
point.X = 73
point.Y = -21
assert point.ToString() == 'Point<X=73, Y=-21>'
point = lib.A.B.C.Point(-3, 54)
assert point.X == -3
assert point.Y == 54
assert point.ToString() == 'Point<X=-3, Y=54>'
# a struct not in a namespace
point = lib.Point()
assert point.X == 0
assert point.Y == 0
point = lib.Point(123, 456)
assert point.X == 123
assert point.Y == 456
# still need to create the instance in Python
StructWithoutConstructor = lib.StructWithoutConstructor()
assert StructWithoutConstructor.X == 0
assert StructWithoutConstructor.Y == 0
StructWithoutConstructor.X = 1
StructWithoutConstructor.Y = -1
assert StructWithoutConstructor.X == 1
assert StructWithoutConstructor.Y == -1
def test_issue8():
# checks that Issue #8 is fixed
bitness = '64' if loadlib.IS_PYTHON_64BIT else '32'
loadlib.LoadLibrary(
pathlib.Path(os.path.join(EXAMPLES_DIR, 'cpp_lib' + bitness)))
def test_invalid_path():
for item in [None, '']:
with pytest.raises(ValueError):
loadlib.LoadLibrary(item)
def test_java():
try:
jar = loadlib.LoadLibrary(EXAMPLES_DIR + '/java_lib.jar')
except (IOError, OSError) as e:
# if py4j is located in the .eggs directory and not in the site-packages directory
# then the py4j*.jar file cannot be found so we need to create a PY4J_JAR env variable
msg = str(e)
if 'Create a PY4J_JAR environment variable' not in msg:
raise
import py4j
os.environ['PY4J_JAR'] = os.path.join(
'.eggs', 'py4j-{}-py{}.{}.egg'.format(py4j.__version__,
sys.version_info.major,
sys.version_info.minor),
'share', 'py4j', 'py4j{}.jar'.format(py4j.__version__))
jar = loadlib.LoadLibrary(EXAMPLES_DIR + '/java_lib.jar')
Math = jar.lib.nz.msl.examples.MathUtils
Matrix = jar.lib.nz.msl.examples.Matrix
assert 0.0 <= Math.random() < 1.0
assert Math.sqrt(32.4) == pytest.approx(5.69209978830308)
#
# check LU decomposition
#
n = 14
m1 = Matrix(n, n, 2.0, 8.0)
L = m1.getL()
U = m1.getU()
LU = m1.multiply(L, U)
for i in range(n):
for j in range(n):
assert m1.getValue(i, j) == pytest.approx(LU.getValue(i, j))
#
# check QR decomposition
#
n = 8
m2 = Matrix(n, n, -100.0, 100.0)
Q = m2.getQ()
R = m2.getR()
QR = m2.multiply(Q, R)
for i in range(n):
for j in range(n):
assert m2.getValue(i, j) == pytest.approx(QR.getValue(i, j))
#
# solve Ax=b
#
m3 = jar.gateway.new_array(jar.lib.Double, 3, 3)
m3[0][0] = 3.
m3[0][1] = 2.
m3[0][2] = -1.
m3[1][0] = 2.
m3[1][1] = -2.
m3[1][2] = 4.
m3[2][0] = -1.0
m3[2][1] = 0.5
m3[2][2] = 1.0
m4 = jar.gateway.new_array(jar.lib.Double, 3)
m4[0] = 1.0
m4[1] = -2.0
m4[2] = 0.0
A = Matrix(m3)
x = Matrix.solve(A, Matrix(m4))
bprime = Matrix.multiply(A, x)
for i in range(3):
assert bprime.getValue(i, 0) == pytest.approx(m4[i])
#
# Check inverse
#
n = 30
m5 = Matrix(n, n, 0.0, 100.0)
m6 = m5.getInverse()
m7 = Matrix.multiply(m5, m6)
identity = Matrix(n)
for i in range(n):
for j in range(n):
assert identity.getValue(i, j) == pytest.approx(m7.getValue(i, j),
abs=1e-10)
#
# Check determinant
#
a = [[6, 1, 1], [4, -2, 5], [2, 8, 7]]
ja = jar.gateway.new_array(jar.lib.Double, 3, 3)
for i in range(3):
for j in range(3):
ja[i][j] = float(a[i][j])
m8 = Matrix(ja)
assert m8.getDeterminant() == pytest.approx(-306)
jar.gateway.shutdown()
import math
cls = loadlib.LoadLibrary(EXAMPLES_DIR + '/Trig.class')
Trig = cls.lib.Trig
x = 0.123456
assert Trig.cos(x) == pytest.approx(math.cos(x))
assert Trig.cosh(x) == pytest.approx(math.cosh(x))
assert Trig.acos(x) == pytest.approx(math.acos(x))
assert Trig.sin(x) == pytest.approx(math.sin(x))
assert Trig.sinh(x) == pytest.approx(math.sinh(x))
assert Trig.asin(x) == pytest.approx(math.asin(x))
assert Trig.tan(x) == pytest.approx(math.tan(x))
assert Trig.tanh(x) == pytest.approx(math.tanh(x))
assert Trig.atan(x) == pytest.approx(math.atan(x))
assert Trig.atan2(-4.321, x) == pytest.approx(math.atan2(-4.321, x))
cls.gateway.shutdown()
