Numpy.sert_almost_equal — NumPy V1.23 Manual

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numpy.testing.assert_almost_equal# testing.assert_almost_equal(actual, desired, decimal=7, err_msg='', verbose=True)[source]#

Raises an AssertionError if two items are not equal up to desired precision.

Note

It is recommended to use one of assert_allclose, assert_array_almost_equal_nulp or assert_array_max_ulp instead of this function for more consistent floating point comparisons.

The test verifies that the elements of actual and desired satisfy:

abs(desired-actual) < float64(1.5 * 10**(-decimal))

That is a looser test than originally documented, but agrees with what the actual implementation in assert_array_almost_equal did up to rounding vagaries. An exception is raised at conflicting values. For ndarrays this delegates to assert_array_almost_equal

Parameters: actualarray_like

The object to check.

desiredarray_like

The expected object.

decimalint, optional

Desired precision, default is 7.

err_msgstr, optional

The error message to be printed in case of failure.

verbosebool, optional

If True, the conflicting values are appended to the error message.

Raises: AssertionError

If actual and desired are not equal up to specified precision.

See also

assert_allclose

Compare two array_like objects for equality with desired relative and/or absolute precision.

assert_array_almost_equal_nulp, assert_array_max_ulp, assert_equal

Examples

Try it in your browser! >>> fromnumpy.testingimport assert_almost_equal >>> assert_almost_equal(2.3333333333333, 2.33333334) >>> assert_almost_equal(2.3333333333333, 2.33333334, decimal=10) Traceback (most recent call last): ... AssertionError: Arrays are not almost equal to 10 decimals ACTUAL: 2.3333333333333 DESIRED: 2.33333334 >>> assert_almost_equal(np.array([1.0,2.3333333333333]), ... np.array([1.0,2.33333334]), decimal=9) Traceback (most recent call last): ... AssertionError: Arrays are not almost equal to 9 decimals Mismatched elements: 1 / 2 (50%) Mismatch at index: [1]: 2.3333333333333 (ACTUAL), 2.33333334 (DESIRED) Max absolute difference among violations: 6.66669964e-09 Max relative difference among violations: 2.85715698e-09 ACTUAL: array([1. , 2.333333333]) DESIRED: array([1. , 2.33333334]) Go BackOpen In Tab On this page
  • testing.assert_almost_equal

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