def test_julia_matrix_elements():
A = Matrix([[x, 2, x * y]])
assert julia_code(A[0, 0]**2 + A[0, 1] + A[0, 2]) == "x.^2 + x.*y + 2"
A = MatrixSymbol('AA', 1, 3)
assert julia_code(A) == "AA"
assert julia_code(A[0, 0]**2 + sin(A[0,1]) + A[0,2]) == \
"sin(AA[1,2]) + AA[1,1].^2 + AA[1,3]"
assert julia_code(sum(A)) == "AA[1,1] + AA[1,2] + AA[1,3]"
def test_julia_matrix_assign_to_more():
# assigning to Symbol or MatrixSymbol requires lhs/rhs match
A = Matrix([[1, 2, 3]])
B = MatrixSymbol('B', 1, 3)
C = MatrixSymbol('C', 2, 3)
assert julia_code(A, assign_to=B) == "B = [1 2 3]"
raises(ValueError, lambda: julia_code(A, assign_to=x))
raises(ValueError, lambda: julia_code(A, assign_to=C))
def test_julia_matrix_1x1():
A = Matrix([[3]])
B = MatrixSymbol('B', 1, 1)
C = MatrixSymbol('C', 1, 2)
assert julia_code(A, assign_to=B) == "B = [3]"
# FIXME?
#assert julia_code(A, assign_to=x) == "x = [3]"
raises(ValueError, lambda: julia_code(A, assign_to=C))
def test_julia_not_supported():
assert julia_code(S.ComplexInfinity) == ("# Not supported in Julia:\n"
"# ComplexInfinity\n"
"zoo")
f = Function('f')
assert julia_code(f(x).diff(x)) == ("# Not supported in Julia:\n"
"# Derivative\n"
"Derivative(f(x), x)")
def test_MatrixElement_printing():
# test cases for issue #11821
A = MatrixSymbol("A", 1, 3)
B = MatrixSymbol("B", 1, 3)
C = MatrixSymbol("C", 1, 3)
assert (julia_code(A[0, 0]) == "A[1,1]")
assert (julia_code(3 * A[0, 0]) == "3*A[1,1]")
F = C[0, 0].subs(C, A - B)
assert (julia_code(F) == "(A - B)[1,1]")
def test_haramard():
A = MatrixSymbol('A', 3, 3)
B = MatrixSymbol('B', 3, 3)
v = MatrixSymbol('v', 3, 1)
h = MatrixSymbol('h', 1, 3)
C = HadamardProduct(A, B)
assert julia_code(C) == "A.*B"
assert julia_code(C * v) == "(A.*B)*v"
assert julia_code(h * C * v) == "h*(A.*B)*v"
assert julia_code(C * A) == "(A.*B)*A"
# mixing Hadamard and scalar strange b/c we vectorize scalars
assert julia_code(C * x * y) == "(x.*y)*(A.*B)"
def test_Pow():
assert julia_code(x**3) == "x.^3"
assert julia_code(x**(y**3)) == "x.^(y.^3)"
assert julia_code(x**Rational(2, 3)) == 'x.^(2/3)'
g = implemented_function('g', Lambda(x, 2 * x))
assert julia_code(1/(g(x)*3.5)**(x - y**x)/(x**2 + y)) == \
"(3.5*2*x).^(-x + y.^x)./(x.^2 + y)"
# For issue 14160
assert julia_code(
Mul(-2,
x,
Pow(Mul(y, y, evaluate=False), -1, evaluate=False),
evaluate=False)) == '-2*x./(y.*y)'
def test_Matrices_entries_not_hadamard():
# For Matrix with col >= 2, row >= 2, they need to be scalars
# FIXME: is it worth worrying about this? Its not wrong, just
# leave it user's responsibility to put scalar data for x.
A = Matrix([[1, sin(2 / x), 3 * pi / x / 5], [1, 2, x * y]])
expected = ("[1 sin(2/x) 3*pi/(5*x);\n"
"1 2 x*y]") # <- we give x.*y
assert julia_code(A) == expected
def test_julia_piecewise():
expr = Piecewise((x, x < 1), (x**2, True))
assert julia_code(expr) == "((x < 1) ? (x) : (x.^2))"
assert julia_code(expr, assign_to="r") == ("r = ((x < 1) ? (x) : (x.^2))")
assert julia_code(expr, assign_to="r", inline=False) == ("if (x < 1)\n"
" r = x\n"
"else\n"
" r = x.^2\n"
"end")
expr = Piecewise((x**2, x < 1), (x**3, x < 2), (x**4, x < 3), (x**5, True))
expected = ("((x < 1) ? (x.^2) :\n"
"(x < 2) ? (x.^3) :\n"
"(x < 3) ? (x.^4) : (x.^5))")
assert julia_code(expr) == expected
assert julia_code(expr, assign_to="r") == "r = " + expected
assert julia_code(expr, assign_to="r", inline=False) == ("if (x < 1)\n"
" r = x.^2\n"
"elseif (x < 2)\n"
" r = x.^3\n"
"elseif (x < 3)\n"
" r = x.^4\n"
"else\n"
" r = x.^5\n"
"end")
# Check that Piecewise without a True (default) condition error
expr = Piecewise((x, x < 1), (x**2, x > 1), (sin(x), x > 0))
raises(ValueError, lambda: julia_code(expr))
def test_boolean():
assert julia_code(x & y) == "x && y"
assert julia_code(x | y) == "x || y"
assert julia_code(~x) == "!x"
assert julia_code(x & y & z) == "x && y && z"
assert julia_code(x | y | z) == "x || y || z"
assert julia_code((x & y) | z) == "z || x && y"
assert julia_code((x | y) & z) == "z && (x || y)"
def test_constants():
assert julia_code(pi) == "pi"
assert julia_code(oo) == "Inf"
assert julia_code(-oo) == "-Inf"
assert julia_code(S.NegativeInfinity) == "-Inf"
assert julia_code(S.NaN) == "NaN"
assert julia_code(S.Exp1) == "e"
assert julia_code(exp(1)) == "e"
def test_sparse():
M = SparseMatrix(5, 6, {})
M[2, 2] = 10
M[1, 2] = 20
M[1, 3] = 22
M[0, 3] = 30
M[3, 0] = x * y
assert julia_code(M) == (
"sparse([4, 2, 3, 1, 2], [1, 3, 3, 4, 4], [x.*y, 20, 10, 30, 22], 5, 6)"
)
def test_MatrixSymbol():
n = Symbol('n', integer=True)
A = MatrixSymbol('A', n, n)
B = MatrixSymbol('B', n, n)
assert julia_code(A * B) == "A*B"
assert julia_code(B * A) == "B*A"
assert julia_code(2 * A * B) == "2*A*B"
assert julia_code(B * 2 * A) == "2*B*A"
assert julia_code(A * (B + 3 * Identity(n))) == "A*(3*eye(n) + B)"
assert julia_code(A**(x**2)) == "A^(x.^2)"
assert julia_code(A**3) == "A^3"
assert julia_code(A**S.Half) == "A^(1/2)"
def test_trick_indent_with_end_else_words():
# words starting with "end" or "else" do not confuse the indenter
t1 = S('endless')
t2 = S('elsewhere')
pw = Piecewise((t1, x < 0), (t2, x <= 1), (1, True))
assert julia_code(pw, inline=False) == ("if (x < 0)\n"
" endless\n"
"elseif (x <= 1)\n"
" elsewhere\n"
"else\n"
" 1\n"
"end")
def test_Rational():
assert julia_code(Rational(3, 7)) == "3/7"
assert julia_code(Rational(18, 9)) == "2"
assert julia_code(Rational(3, -7)) == "-3/7"
assert julia_code(Rational(-3, -7)) == "3/7"
assert julia_code(x + Rational(3, 7)) == "x + 3/7"
assert julia_code(Rational(3, 7) * x) == "3*x/7"
def test_mix_number_pow_symbols():
assert julia_code(pi**3) == 'pi^3'
assert julia_code(x**2) == 'x.^2'
assert julia_code(x**(pi**3)) == 'x.^(pi^3)'
assert julia_code(x**y) == 'x.^y'
assert julia_code(x**(y**z)) == 'x.^(y.^z)'
assert julia_code((x**y)**z) == '(x.^y).^z'
def test_Relational():
assert julia_code(Eq(x, y)) == "x == y"
assert julia_code(Ne(x, y)) == "x != y"
assert julia_code(Le(x, y)) == "x <= y"
assert julia_code(Lt(x, y)) == "x < y"
assert julia_code(Gt(x, y)) == "x > y"
assert julia_code(Ge(x, y)) == "x >= y"
def test_containers():
assert julia_code([1, 2, 3, [4, 5, [6, 7]], 8, [9, 10], 11]) == \
"Any[1, 2, 3, Any[4, 5, Any[6, 7]], 8, Any[9, 10], 11]"
assert julia_code((1, 2, (3, 4))) == "(1, 2, (3, 4))"
assert julia_code([1]) == "Any[1]"
assert julia_code((1, )) == "(1,)"
assert julia_code(Tuple(*[1, 2, 3])) == "(1, 2, 3)"
assert julia_code((1, x * y, (3, x**2))) == "(1, x.*y, (3, x.^2))"
# scalar, matrix, empty matrix and empty list
assert julia_code(
(1, eye(3), Matrix(0, 0, []),
[])) == "(1, [1 0 0;\n0 1 0;\n0 0 1], zeros(0, 0), Any[])"
def test_specfun():
n = Symbol('n')
for f in [besselj, bessely, besseli, besselk]:
assert julia_code(f(n, x)) == f.__name__ + '(n, x)'
for f in [airyai, airyaiprime, airybi, airybiprime]:
assert julia_code(f(x)) == f.__name__ + '(x)'
assert julia_code(hankel1(n, x)) == 'hankelh1(n, x)'
assert julia_code(hankel2(n, x)) == 'hankelh2(n, x)'
assert julia_code(jn(
n, x)) == 'sqrt(2)*sqrt(pi)*sqrt(1./x).*besselj(n + 1/2, x)/2'
assert julia_code(yn(
n, x)) == 'sqrt(2)*sqrt(pi)*sqrt(1./x).*bessely(n + 1/2, x)/2'
def test_Matrices():
assert julia_code(Matrix(1, 1, [10])) == "[10]"
A = Matrix([[1, sin(x / 2), abs(x)], [0, 1, pi], [0, exp(1),
ceiling(x)]])
expected = ("[1 sin(x/2) abs(x);\n"
"0 1 pi;\n"
"0 e ceil(x)]")
assert julia_code(A) == expected
# row and columns
assert julia_code(A[:, 0]) == "[1, 0, 0]"
assert julia_code(A[0, :]) == "[1 sin(x/2) abs(x)]"
# empty matrices
assert julia_code(Matrix(0, 0, [])) == 'zeros(0, 0)'
assert julia_code(Matrix(0, 3, [])) == 'zeros(0, 3)'
# annoying to read but correct
assert julia_code(Matrix([[x, x - y, -y]])) == "[x x - y -y]"
def test_mix_number_mult_symbols():
assert julia_code(3 * x) == "3*x"
assert julia_code(pi * x) == "pi*x"
assert julia_code(3 / x) == "3./x"
assert julia_code(pi / x) == "pi./x"
assert julia_code(x / 3) == "x/3"
assert julia_code(x / pi) == "x/pi"
assert julia_code(x * y) == "x.*y"
assert julia_code(3 * x * y) == "3*x.*y"
assert julia_code(3 * pi * x * y) == "3*pi*x.*y"
assert julia_code(x / y) == "x./y"
assert julia_code(3 * x / y) == "3*x./y"
assert julia_code(x * y / z) == "x.*y./z"
assert julia_code(x / y * z) == "x.*z./y"
assert julia_code(1 / x / y) == "1./(x.*y)"
assert julia_code(2 * pi * x / y / z) == "2*pi*x./(y.*z)"
assert julia_code(3 * pi / x) == "3*pi./x"
assert julia_code(S(3) / 5) == "3/5"
assert julia_code(S(3) / 5 * x) == "3*x/5"
assert julia_code(x / y / z) == "x./(y.*z)"
assert julia_code((x + y) / z) == "(x + y)./z"
assert julia_code((x + y) / (z + x)) == "(x + y)./(x + z)"
assert julia_code((x + y) / EulerGamma) == "(x + y)/eulergamma"
assert julia_code(x / 3 / pi) == "x/(3*pi)"
assert julia_code(S(3) / 5 * x * y / pi) == "3*x.*y/(5*pi)"
def test_1_over_x_and_sqrt():
# 1.0 and 0.5 would do something different in regular StrPrinter,
# but these are exact in IEEE floating point so no different here.
assert julia_code(1 / x) == '1./x'
assert julia_code(x**-1) == julia_code(x**-1.0) == '1./x'
assert julia_code(1 / sqrt(x)) == '1./sqrt(x)'
assert julia_code(x**-S.Half) == julia_code(x**-0.5) == '1./sqrt(x)'
assert julia_code(sqrt(x)) == 'sqrt(x)'
assert julia_code(x**S.Half) == julia_code(x**0.5) == 'sqrt(x)'
assert julia_code(1 / pi) == '1/pi'
assert julia_code(pi**-1) == julia_code(pi**-1.0) == '1/pi'
assert julia_code(pi**-0.5) == '1/sqrt(pi)'
def test_basic_ops():
assert julia_code(x * y) == "x.*y"
assert julia_code(x + y) == "x + y"
assert julia_code(x - y) == "x - y"
assert julia_code(-x) == "-x"
def test_Function():
assert julia_code(sin(x)**cos(x)) == "sin(x).^cos(x)"
assert julia_code(abs(x)) == "abs(x)"
assert julia_code(ceiling(x)) == "ceil(x)"
def test_Integer():
assert julia_code(Integer(67)) == "67"
assert julia_code(Integer(-1)) == "-1"
def test_special_matrices():
assert julia_code(6 * Identity(3)) == "6*eye(3)"
def test_julia_noninline():
source = julia_code((x + y) / Catalan, assign_to='me', inline=False)
expected = ("const Catalan = %s\n"
"me = (x + y)/Catalan") % Catalan.evalf(17)
assert source == expected
def test_julia_piecewise_times_const():
pw = Piecewise((x, x < 1), (x**2, True))
assert julia_code(2 * pw) == "2*((x < 1) ? (x) : (x.^2))"
assert julia_code(pw / x) == "((x < 1) ? (x) : (x.^2))./x"
assert julia_code(pw / (x * y)) == "((x < 1) ? (x) : (x.^2))./(x.*y)"
assert julia_code(pw / 3) == "((x < 1) ? (x) : (x.^2))/3"
def test_julia_boolean():
assert julia_code(True) == "true"
assert julia_code(S.true) == "true"
assert julia_code(False) == "false"
assert julia_code(S.false) == "false"
def test_julia_matrix_assign_to():
A = Matrix([[1, 2, 3]])
assert julia_code(A, assign_to='a') == "a = [1 2 3]"
A = Matrix([[1, 2], [3, 4]])
assert julia_code(A, assign_to='A') == "A = [1 2;\n3 4]"
