Python Derivative.subsの例

コード例 #1

def test_derivative_subs3():
    x = Symbol('x')
    dex = Derivative(exp(x), x)
    assert Derivative(dex, x).subs({dex: exp(x)}) == dex
    assert dex.subs({exp(x): dex}) == Derivative(exp(x), x, x)

コード例 #2

def test_deriv_sub_bug3():
    y = Symbol('y')
    f = Function('f')
    pat = Derivative(f(x), x, x)
    assert pat.subs({y: y**2}) == Derivative(f(x), x, x)
    assert pat.subs({y: y**2}) != Derivative(f(x), x)

コード例 #3

ファイル: test_subs.py プロジェクト: skirpichev/diofant

def test_derivative_subs3():
    x = Symbol('x')
    dex = Derivative(exp(x), x)
    assert Derivative(dex, x).subs({dex: exp(x)}) == dex
    assert dex.subs({exp(x): dex}) == Derivative(exp(x), x, x)

コード例 #4

ファイル: test_subs.py プロジェクト: goretkin/diofant

def test_derivative_subs3():
    x = Symbol('x')
    dex = Derivative(exp(x), x)
    assert Derivative(dex, x).subs(dex, exp(x)) == dex
    assert dex.subs(exp(x), dex) == Derivative(exp(x), x, x)

コード例 #5

ファイル: test_subs.py プロジェクト: skirpichev/diofant

def test_deriv_sub_bug3():
    y = Symbol('y')
    f = Function('f')
    pat = Derivative(f(x), x, x)
    assert pat.subs({y: y**2}) == Derivative(f(x), x, x)
    assert pat.subs({y: y**2}) != Derivative(f(x), x)