在 python 中是否有测试浮点近似相等的函数?类似的,
Is there a function to test floating point approximate equality in python? Something like,
def approx_equal(a, b, tol):
return abs(a - b) < tol
我的用例类似于 Google 的 C++ 测试库 gtest.h 定义 EXPECT_NEAR
的方式.
My use case is similar to how Google's C++ testing library, gtest.h, defines EXPECT_NEAR
.
这是一个例子:
def bernoulli_fraction_to_angle(fraction):
return math.asin(sqrt(fraction))
def bernoulli_angle_to_fraction(angle):
return math.sin(angle) ** 2
def test_bernoulli_conversions():
assert(approx_equal(bernoulli_angle_to_fraction(pi / 4), 0.5, 1e-4))
assert(approx_equal(
bernoulli_fraction_to_angle(bernoulli_angle_to_fraction(0.1)),
0.1, 1e-4))
math.isclose
.numpy.allclose
.numpy.testing.assert_allclose
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