Python manual_subs示例

示例#1

文件： test_manual.py 项目： gamechanger98/sympy

def test_manual_subs():
    x, y = symbols('x y')
    expr = log(x) + exp(x)
    # if log(x) is y, then exp(y) is x
    assert manual_subs(expr, log(x), y) == y + exp(exp(y))
    # if exp(x) is y, then log(y) need not be x
    assert manual_subs(expr, exp(x), y) == log(x) + y

示例#2

def test_manual_subs():
    x, y = symbols('x y')
    expr = log(x) + exp(x)
    # if log(x) is y, then exp(y) is x
    assert manual_subs(expr, log(x), y) == y + exp(exp(y))
    # if exp(x) is y, then log(y) need not be x
    assert manual_subs(expr, exp(x), y) == log(x) + y

示例#3

文件： test_manual.py 项目： PWJ1900/Rlearncirq

def test_manual_subs():
    x, y = symbols('x y')
    expr = log(x) + exp(x)
    # if log(x) is y, then exp(y) is x
    assert manual_subs(expr, log(x), y) == y + exp(exp(y))
    # if exp(x) is y, then log(y) need not be x
    assert manual_subs(expr, exp(x), y) == log(x) + y

    raises(ValueError, lambda: manual_subs(expr, x))
    raises(ValueError, lambda: manual_subs(expr, exp(x), x, y))