numpy.bitwise_and — NumPy v2.2 Manual (original) (raw)

numpy.bitwise_and(x1, x2, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, _subok=True_[, _signature_]) = <ufunc 'bitwise_and'>#

Compute the bit-wise AND of two arrays element-wise.

Computes the bit-wise AND of the underlying binary representation of the integers in the input arrays. This ufunc implements the C/Python operator &.

Parameters:

x1, x2array_like

Only integer and boolean types are handled. If x1.shape != x2.shape, they must be broadcastable to a common shape (which becomes the shape of the output).

outndarray, None, or tuple of ndarray and None, optional

A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. A tuple (possible only as a keyword argument) must have length equal to the number of outputs.

wherearray_like, optional

This condition is broadcast over the input. At locations where the condition is True, the out array will be set to the ufunc result. Elsewhere, the out array will retain its original value. Note that if an uninitialized out array is created via the defaultout=None, locations within it where the condition is False will remain uninitialized.

**kwargs

For other keyword-only arguments, see theufunc docs.

Returns:

outndarray or scalar

Result. This is a scalar if both x1 and x2 are scalars.

Examples

The number 13 is represented by 00001101. Likewise, 17 is represented by 00010001. The bit-wise AND of 13 and 17 is therefore 000000001, or 1:

np.bitwise_and(13, 17) 1

np.bitwise_and(14, 13) 12 np.binary_repr(12) '1100' np.bitwise_and([14,3], 13) array([12, 1])

np.bitwise_and([11,7], [4,25]) array([0, 1]) np.bitwise_and(np.array([2,5,255]), np.array([3,14,16])) array([ 2, 4, 16]) np.bitwise_and([True, True], [False, True]) array([False, True])

The & operator can be used as a shorthand for np.bitwise_and on ndarrays.

x1 = np.array([2, 5, 255]) x2 = np.array([3, 14, 16]) x1 & x2 array([ 2, 4, 16])