numpy.array_equal

numpy.array_equal(a1, a2, equal_nan=False)[source]

True if two arrays have the same shape and elements, False otherwise.

Parameters:

a1, a2array_like

Input arrays.

equal_nanbool

Whether to compare NaN’s as equal. If the dtype of a1 and a2 is complex, values will be considered equal if either the real or the imaginary component of a given value is nan.

Returns:

bbool

Returns True if the arrays are equal.

See also

allclose

Returns True if two arrays are element-wise equal within a tolerance.

array_equiv

Returns True if input arrays are shape consistent and all elements equal.

Examples

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>>> import numpy as np

>>> np.array_equal([1, 2], [1, 2])
True

>>> np.array_equal(np.array([1, 2]), np.array([1, 2]))
True

>>> np.array_equal([1, 2], [1, 2, 3])
False

>>> np.array_equal([1, 2], [1, 4])
False

>>> a = np.array([1, np.nan])
>>> np.array_equal(a, a)
False

>>> np.array_equal(a, a, equal_nan=True)
True

When equal_nan is True, complex values with nan components are considered equal if either the real or the imaginary components are nan.

>>> a = np.array([1 + 1j])
>>> b = a.copy()
>>> a.real = np.nan
>>> b.imag = np.nan
>>> np.array_equal(a, b, equal_nan=True)
True

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