Logic functions

Truth value testing

method description
all(a[, axis, out, keepdims]) Test whether all array elements along a given axis evaluate to True.
any(a[, axis, out, keepdims]) Test whether any array element along a given axis evaluates to True.

Array contents

method description
isfinite(x, /[, out, where, casting, order, …]) Test element-wise for finiteness (not infinity or not Not a Number).
isinf(x, /[, out, where, casting, order, …]) Test element-wise for positive or negative infinity.
isnan(x, /[, out, where, casting, order, …]) Test element-wise for NaN and return result as a boolean array.
isnat(x, /[, out, where, casting, order, …]) Test element-wise for NaT (not a time) and return result as a boolean array.
isneginf(x[, out]) Test element-wise for negative infinity, return result as bool array.
isposinf(x[, out]) Test element-wise for positive infinity, return result as bool array.

Array type testing

method description
iscomplex(x) Returns a bool array, where True if input element is complex.
iscomplexobj(x) Check for a complex type or an array of complex numbers.
isfortran(a) Check if the array is Fortran contiguous but not C contiguous.
isreal(x) Returns a bool array, where True if input element is real.
isrealobj(x) Return True if x is a not complex type or an array of complex numbers.
isscalar(num) Returns True if the type of num is a scalar type.

Logical operations

method description
logical_and(x1, x2, /[, out, where, …]) Compute the truth value of x1 AND x2 element-wise.
logical_or(x1, x2, /[, out, where, casting, …]) Compute the truth value of x1 OR x2 element-wise.
logical_not(x, /[, out, where, casting, …]) Compute the truth value of NOT x element-wise.
logical_xor(x1, x2, /[, out, where, …]) Compute the truth value of x1 XOR x2, element-wise.

Comparison

method description
allclose(a, b[, rtol, atol, equal_nan]) Returns True if two arrays are element-wise equal within a tolerance.
isclose(a, b[, rtol, atol, equal_nan]) Returns a boolean array where two arrays are element-wise equal within a tolerance.
array_equal(a1, a2) True if two arrays have the same shape and elements, False otherwise.
array_equiv(a1, a2) Returns True if input arrays are shape consistent and all elements equal.
greater(x1, x2, /[, out, where, casting, …]) Return the truth value of (x1 > x2) element-wise.
greater_equal(x1, x2, /[, out, where, …]) Return the truth value of (x1 >= x2) element-wise.
less(x1, x2, /[, out, where, casting, …]) Return the truth value of (x1 < x2) element-wise.
less_equal(x1, x2, /[, out, where, casting, …]) Return the truth value of (x1 =< x2) element-wise.
equal(x1, x2, /[, out, where, casting, …]) Return (x1 == x2) element-wise.
not_equal(x1, x2, /[, out, where, casting, …]) Return (x1 != x2) element-wise.