Exemple #1
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def test_sin():
    x = Symbol("x")
    e = sin(x)
    assert e == sin(x)
    assert e != cos(x)

    assert sin(x).diff(x) == cos(x)
    assert cos(x).diff(x) == -sin(x)

    e = sqrt(x).diff(x).diff(x)
    f = sin(e)
    g = f.diff(x).diff(x)
    assert isinstance(g, Add)
Exemple #2
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def test_sin():
    x = Symbol("x")
    e = sin(x)
    assert e == sin(x)
    assert e != cos(x)

    assert sin(x).diff(x) == cos(x)
    assert cos(x).diff(x) == -sin(x)

    e = sqrt(x).diff(x).diff(x)
    f = sin(e)
    g = f.diff(x).diff(x)
    assert isinstance(g, Add)
Exemple #3
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def test_sin():
    x = Symbol("x")
    y = Symbol("y")
    e = sin(x)
    assert e.subs({x: y}) == sin(y)
    assert e.subs({x: y}) != sin(x)

    e = cos(x)
    assert e.subs({x: 0}) == 1
    assert e.subs(x, 0) == 1
def test_sin():
    x = Symbol("x")
    y = Symbol("y")
    e = sin(x)
    assert e.subs({x: y}) == sin(y)
    assert e.subs({x: y}) != sin(x)

    e = cos(x)
    assert e.subs({x: 0}) == 1
    assert e.subs(x, 0) == 1
Exemple #5
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def test_abs():
    x = Symbol("x")
    e = abs(x)
    assert e == abs(x)
    assert e != cos(x)

    assert abs(5) == 5
    assert abs(-5) == 5
    assert abs(Integer(5)/3) == Integer(5)/3
    assert abs(-Integer(5)/3) == Integer(5)/3
    assert abs(Integer(5)/3+x) != Integer(5)/3
    assert abs(Integer(5)/3+x) == abs(Integer(5)/3+x)
Exemple #6
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def test_abs():
    x = Symbol("x")
    e = abs(x)
    assert e == abs(x)
    assert e != cos(x)

    assert abs(5) == 5
    assert abs(-5) == 5
    assert abs(Integer(5)/3) == Integer(5)/3
    assert abs(-Integer(5)/3) == Integer(5)/3
    assert abs(Integer(5)/3+x) != Integer(5)/3
    assert abs(Integer(5)/3+x) == abs(Integer(5)/3+x)
Exemple #7
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def test_conv7b():
    x = sympy.Symbol("x")
    y = sympy.Symbol("y")
    assert sympify(sympy.sin(x / 3)) == sin(Symbol("x") / 3)
    assert sympify(sympy.sin(x / 3)) != cos(Symbol("x") / 3)
    assert sympify(sympy.cos(x / 3)) == cos(Symbol("x") / 3)
Exemple #8
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def test_conv7():
    x = Symbol("x")
    y = Symbol("y")
    assert sin(x / 3)._sympy_() == sympy.sin(sympy.Symbol("x") / 3)
    assert sin(x / 3)._sympy_() != sympy.cos(sympy.Symbol("x") / 3)
    assert cos(x / 3)._sympy_() == sympy.cos(sympy.Symbol("x") / 3)
Exemple #9
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def test_args():
    x = Symbol("x")
    e = cos(x)
    f = e.subs(x, 0, 3)
Exemple #10
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def test_args():
    x = Symbol("x")
    e = cos(x)
    raises(TypeError, lambda: e.subs(x, 0, 3))
Exemple #11
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def test_eval_double2():
    x = Symbol("x")
    y = Symbol("y")
    e = sin(x)**2 + cos(x)**2
    raises(RuntimeError, lambda: (abs(eval_double(e) - 1) < 1e-9))
Exemple #12
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def test_eval_double1():
    x = Symbol("x")
    y = Symbol("y")
    e = sin(x)**2 + cos(x)**2
    e = e.subs(x, 7)
    assert abs(eval_double(e) - 1) < 1e-9
Exemple #13
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def test_eval_double2():
    x = Symbol("x")
    y = Symbol("y")
    e = sin(x)**2 + cos(x)**2
    assert abs(eval_double(e) - 1) < 1e-9
Exemple #14
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def test_args():
    x = Symbol("x")
    e = cos(x)
    f = e.subs(x, 0, 3)
Exemple #15
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def test_conv7():
    x = Symbol("x")
    y = Symbol("y")
    assert sin(x/3)._sympy_() == sympy.sin(sympy.Symbol("x") / 3)
    assert sin(x/3)._sympy_() != sympy.cos(sympy.Symbol("x") / 3)
    assert cos(x/3)._sympy_() == sympy.cos(sympy.Symbol("x") / 3)
Exemple #16
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def test_conv7b():
    x = sympy.Symbol("x")
    y = sympy.Symbol("y")
    assert sympify(sympy.sin(x/3)) == sin(Symbol("x") / 3)
    assert sympify(sympy.sin(x/3)) != cos(Symbol("x") / 3)
    assert sympify(sympy.cos(x/3)) == cos(Symbol("x") / 3)
Exemple #17
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def test_eval_double2():
    x = Symbol("x")
    y = Symbol("y")
    e = sin(x)**2 + cos(x)**2
    raises(RuntimeError, lambda: (abs(eval_double(e) - 1) < 1e-9))