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test_mutable_ndim_array.py
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test_mutable_ndim_array.py
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from copy import copy
from sympy.tensor.array.dense_ndim_array import MutableDenseNDimArray
from sympy import Symbol, Rational, SparseMatrix, diff, sympify, S
from sympy.core.compatibility import long
from sympy.matrices import Matrix
from sympy.tensor.array.sparse_ndim_array import MutableSparseNDimArray
from sympy.utilities.pytest import raises
def test_ndim_array_initiation():
arr_with_one_element = MutableDenseNDimArray([23])
assert len(arr_with_one_element) == 1
assert arr_with_one_element[0] == 23
assert arr_with_one_element.rank() == 1
raises(ValueError, lambda: arr_with_one_element[1])
arr_with_symbol_element = MutableDenseNDimArray([Symbol('x')])
assert len(arr_with_symbol_element) == 1
assert arr_with_symbol_element[0] == Symbol('x')
assert arr_with_symbol_element.rank() == 1
number5 = 5
vector = MutableDenseNDimArray.zeros(number5)
assert len(vector) == number5
assert vector.shape == (number5,)
assert vector.rank() == 1
raises(ValueError, lambda: arr_with_one_element[5])
vector = MutableSparseNDimArray.zeros(number5)
assert len(vector) == number5
assert vector.shape == (number5,)
assert vector._sparse_array == {}
assert vector.rank() == 1
n_dim_array = MutableDenseNDimArray(range(3**4), (3, 3, 3, 3,))
assert len(n_dim_array) == 3 * 3 * 3 * 3
assert n_dim_array.shape == (3, 3, 3, 3)
assert n_dim_array.rank() == 4
raises(ValueError, lambda: n_dim_array[0, 0, 0, 3])
raises(ValueError, lambda: n_dim_array[3, 0, 0, 0])
raises(ValueError, lambda: n_dim_array[3**4])
array_shape = (3, 3, 3, 3)
sparse_array = MutableSparseNDimArray.zeros(*array_shape)
assert len(sparse_array._sparse_array) == 0
assert len(sparse_array) == 3 * 3 * 3 * 3
assert n_dim_array.shape == array_shape
assert n_dim_array.rank() == 4
one_dim_array = MutableDenseNDimArray([2, 3, 1])
assert len(one_dim_array) == 3
assert one_dim_array.shape == (3,)
assert one_dim_array.rank() == 1
assert one_dim_array.tolist() == [2, 3, 1]
shape = (3, 3)
array_with_many_args = MutableSparseNDimArray.zeros(*shape)
assert len(array_with_many_args) == 3 * 3
assert array_with_many_args.shape == shape
assert array_with_many_args[0, 0] == 0
assert array_with_many_args.rank() == 2
shape = (long(3), long(3))
array_with_long_shape = MutableSparseNDimArray.zeros(*shape)
assert len(array_with_long_shape) == 3 * 3
assert array_with_long_shape.shape == shape
assert array_with_long_shape[long(0), long(0)] == 0
assert array_with_long_shape.rank() == 2
vector_with_long_shape = MutableDenseNDimArray(range(5), long(5))
assert len(vector_with_long_shape) == 5
assert vector_with_long_shape.shape == (long(5),)
assert vector_with_long_shape.rank() == 1
raises(ValueError, lambda: vector_with_long_shape[long(5)])
def test_sympify():
from sympy.abc import x, y, z, t
arr = MutableDenseNDimArray([[x, y], [1, z*t]])
arr_other = sympify(arr)
assert arr_other.shape == (2, 2)
assert arr_other == arr
def test_reshape():
array = MutableDenseNDimArray(range(50), 50)
assert array.shape == (50,)
assert array.rank() == 1
array = array.reshape(5, 5, 2)
assert array.shape == (5, 5, 2)
assert array.rank() == 3
assert len(array) == 50
def test_iterator():
array = MutableDenseNDimArray(range(4), (2, 2))
j = 0
for i in array:
assert i == j
j += 1
array = array.reshape(4)
j = 0
for i in array:
assert i == j
j += 1
def test_getitem():
for ArrayType in [MutableDenseNDimArray, MutableSparseNDimArray]:
array = ArrayType(range(24)).reshape(2, 3, 4)
assert array.tolist() == [[[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]], [[12, 13, 14, 15], [16, 17, 18, 19], [20, 21, 22, 23]]]
assert array[0] == ArrayType([[0, 1, 2, 3], [4, 5, 6, 7], [8, 9, 10, 11]])
assert array[0, 0] == ArrayType([0, 1, 2, 3])
value = 0
for i in range(2):
for j in range(3):
for k in range(4):
assert array[i, j, k] == value
value += 1
raises(ValueError, lambda: array[3, 4, 5])
raises(ValueError, lambda: array[3, 4, 5, 6])
def test_sparse():
sparse_array = MutableSparseNDimArray([0, 0, 0, 1], (2, 2))
assert len(sparse_array) == 2 * 2
# dictionary where all data is, only non-zero entries are actually stored:
assert len(sparse_array._sparse_array) == 1
assert list(sparse_array) == [0, 0, 0, 1]
for i, j in zip(sparse_array, [0, 0, 0, 1]):
assert i == j
sparse_array[0, 0] = 123
assert len(sparse_array._sparse_array) == 2
assert sparse_array[0, 0] == 123
assert sparse_array/0 == MutableSparseNDimArray([[S.ComplexInfinity, S.NaN], [S.NaN, S.ComplexInfinity]], (2, 2))
# when element in sparse array become zero it will disappear from
# dictionary
sparse_array[0, 0] = 0
assert len(sparse_array._sparse_array) == 1
sparse_array[1, 1] = 0
assert len(sparse_array._sparse_array) == 0
assert sparse_array[0, 0] == 0
# test for large scale sparse array
# equality test
a = MutableSparseNDimArray.zeros(100000, 200000)
b = MutableSparseNDimArray.zeros(100000, 200000)
assert a == b
a[1, 1] = 1
b[1, 1] = 2
assert a != b
# __mul__ and __rmul__
assert a * 3 == MutableSparseNDimArray({200001: 3}, (100000, 200000))
assert 3 * a == MutableSparseNDimArray({200001: 3}, (100000, 200000))
assert a * 0 == MutableSparseNDimArray({}, (100000, 200000))
assert 0 * a == MutableSparseNDimArray({}, (100000, 200000))
# __div__
assert a/3 == MutableSparseNDimArray({200001: S.One/3}, (100000, 200000))
# __neg__
assert -a == MutableSparseNDimArray({200001: -1}, (100000, 200000))
def test_calculation():
a = MutableDenseNDimArray([1]*9, (3, 3))
b = MutableDenseNDimArray([9]*9, (3, 3))
c = a + b
for i in c:
assert i == 10
assert c == MutableDenseNDimArray([10]*9, (3, 3))
assert c == MutableSparseNDimArray([10]*9, (3, 3))
c = b - a
for i in c:
assert i == 8
assert c == MutableDenseNDimArray([8]*9, (3, 3))
assert c == MutableSparseNDimArray([8]*9, (3, 3))
def test_ndim_array_converting():
dense_array = MutableDenseNDimArray([1, 2, 3, 4], (2, 2))
alist = dense_array.tolist()
alist == [[1, 2], [3, 4]]
matrix = dense_array.tomatrix()
assert (isinstance(matrix, Matrix))
for i in range(len(dense_array)):
assert dense_array[dense_array._get_tuple_index(i)] == matrix[i]
assert matrix.shape == dense_array.shape
assert MutableDenseNDimArray(matrix) == dense_array
assert MutableDenseNDimArray(matrix.as_immutable()) == dense_array
assert MutableDenseNDimArray(matrix.as_mutable()) == dense_array
sparse_array = MutableSparseNDimArray([1, 2, 3, 4], (2, 2))
alist = sparse_array.tolist()
assert alist == [[1, 2], [3, 4]]
matrix = sparse_array.tomatrix()
assert(isinstance(matrix, SparseMatrix))
for i in range(len(sparse_array)):
assert sparse_array[sparse_array._get_tuple_index(i)] == matrix[i]
assert matrix.shape == sparse_array.shape
assert MutableSparseNDimArray(matrix) == sparse_array
assert MutableSparseNDimArray(matrix.as_immutable()) == sparse_array
assert MutableSparseNDimArray(matrix.as_mutable()) == sparse_array
def test_converting_functions():
arr_list = [1, 2, 3, 4]
arr_matrix = Matrix(((1, 2), (3, 4)))
# list
arr_ndim_array = MutableDenseNDimArray(arr_list, (2, 2))
assert (isinstance(arr_ndim_array, MutableDenseNDimArray))
assert arr_matrix.tolist() == arr_ndim_array.tolist()
# Matrix
arr_ndim_array = MutableDenseNDimArray(arr_matrix)
assert (isinstance(arr_ndim_array, MutableDenseNDimArray))
assert arr_matrix.tolist() == arr_ndim_array.tolist()
assert arr_matrix.shape == arr_ndim_array.shape
def test_equality():
first_list = [1, 2, 3, 4]
second_list = [1, 2, 3, 4]
third_list = [4, 3, 2, 1]
assert first_list == second_list
assert first_list != third_list
first_ndim_array = MutableDenseNDimArray(first_list, (2, 2))
second_ndim_array = MutableDenseNDimArray(second_list, (2, 2))
third_ndim_array = MutableDenseNDimArray(third_list, (2, 2))
fourth_ndim_array = MutableDenseNDimArray(first_list, (2, 2))
assert first_ndim_array == second_ndim_array
second_ndim_array[0, 0] = 0
assert first_ndim_array != second_ndim_array
assert first_ndim_array != third_ndim_array
assert first_ndim_array == fourth_ndim_array
def test_arithmetic():
a = MutableDenseNDimArray([3 for i in range(9)], (3, 3))
b = MutableDenseNDimArray([7 for i in range(9)], (3, 3))
c1 = a + b
c2 = b + a
assert c1 == c2
d1 = a - b
d2 = b - a
assert d1 == d2 * (-1)
e1 = a * 5
e2 = 5 * a
e3 = copy(a)
e3 *= 5
assert e1 == e2 == e3
f1 = a / 5
f2 = copy(a)
f2 /= 5
assert f1 == f2
assert f1[0, 0] == f1[0, 1] == f1[0, 2] == f1[1, 0] == f1[1, 1] == \
f1[1, 2] == f1[2, 0] == f1[2, 1] == f1[2, 2] == Rational(3, 5)
assert type(a) == type(b) == type(c1) == type(c2) == type(d1) == type(d2) \
== type(e1) == type(e2) == type(e3) == type(f1)
z0 = -a
assert z0 == MutableDenseNDimArray([-3 for i in range(9)], (3, 3))
def test_higher_dimenions():
m3 = MutableDenseNDimArray(range(10, 34), (2, 3, 4))
assert m3.tolist() == [[[10, 11, 12, 13],
[14, 15, 16, 17],
[18, 19, 20, 21]],
[[22, 23, 24, 25],
[26, 27, 28, 29],
[30, 31, 32, 33]]]
assert m3._get_tuple_index(0) == (0, 0, 0)
assert m3._get_tuple_index(1) == (0, 0, 1)
assert m3._get_tuple_index(4) == (0, 1, 0)
assert m3._get_tuple_index(12) == (1, 0, 0)
assert str(m3) == '[[[10, 11, 12, 13], [14, 15, 16, 17], [18, 19, 20, 21]], [[22, 23, 24, 25], [26, 27, 28, 29], [30, 31, 32, 33]]]'
m3_rebuilt = MutableDenseNDimArray([[[10, 11, 12, 13], [14, 15, 16, 17], [18, 19, 20, 21]], [[22, 23, 24, 25], [26, 27, 28, 29], [30, 31, 32, 33]]])
assert m3 == m3_rebuilt
m3_other = MutableDenseNDimArray([[[10, 11, 12, 13], [14, 15, 16, 17], [18, 19, 20, 21]], [[22, 23, 24, 25], [26, 27, 28, 29], [30, 31, 32, 33]]], (2, 3, 4))
assert m3 == m3_other
def test_slices():
md = MutableDenseNDimArray(range(10, 34), (2, 3, 4))
assert md[:] == md._array
assert md[:, :, 0].tomatrix() == Matrix([[10, 14, 18], [22, 26, 30]])
assert md[0, 1:2, :].tomatrix() == Matrix([[14, 15, 16, 17]])
assert md[0, 1:3, :].tomatrix() == Matrix([[14, 15, 16, 17], [18, 19, 20, 21]])
assert md[:, :, :] == md
sd = MutableSparseNDimArray(range(10, 34), (2, 3, 4))
assert sd == MutableSparseNDimArray(md)
assert sd[:] == md._array
assert sd[:] == list(sd)
assert sd[:, :, 0].tomatrix() == Matrix([[10, 14, 18], [22, 26, 30]])
assert sd[0, 1:2, :].tomatrix() == Matrix([[14, 15, 16, 17]])
assert sd[0, 1:3, :].tomatrix() == Matrix([[14, 15, 16, 17], [18, 19, 20, 21]])
assert sd[:, :, :] == sd
def test_slices_assign():
a = MutableDenseNDimArray(range(12), shape=(4, 3))
b = MutableSparseNDimArray(range(12), shape=(4, 3))
for i in [a, b]:
assert i.tolist() == [[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]
i[0, :] = [2, 2, 2]
assert i.tolist() == [[2, 2, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]
i[0, 1:] = [8, 8]
assert i.tolist() == [[2, 8, 8], [3, 4, 5], [6, 7, 8], [9, 10, 11]]
i[1:3, 1] = [20, 44]
assert i.tolist() == [[2, 8, 8], [3, 20, 5], [6, 44, 8], [9, 10, 11]]
def test_diff():
from sympy.abc import x, y, z
md = MutableDenseNDimArray([[x, y], [x*z, x*y*z]])
assert md.diff(x) == MutableDenseNDimArray([[1, 0], [z, y*z]])
assert diff(md, x) == MutableDenseNDimArray([[1, 0], [z, y*z]])
sd = MutableSparseNDimArray(md)
assert sd == MutableSparseNDimArray([x, y, x*z, x*y*z], (2, 2))
assert sd.diff(x) == MutableSparseNDimArray([[1, 0], [z, y*z]])
assert diff(sd, x) == MutableSparseNDimArray([[1, 0], [z, y*z]])