numpy.copyto

numpy.copyto(dst, src, casting='same_kind', where=None, preservena=False)

Copies values from one array to another, broadcasting as necessary.

Raises a TypeError if the casting rule is violated, and if where is provided, it selects which elements to copy.

New in version 1.7.0.

Parameters :

dst : ndarray

The array into which values are copied.

src : array_like

The array from which values are copied.

casting : {‘no’, ‘equiv’, ‘safe’, ‘same_kind’, ‘unsafe’}, optional

Controls what kind of data casting may occur when copying.

• ‘no’ means the data types should not be cast at all.
• ‘equiv’ means only byte-order changes are allowed.
• ‘safe’ means only casts which can preserve values are allowed.
• ‘same_kind’ means only safe casts or casts within a kind, like float64 to float32, are allowed.
• ‘unsafe’ means any data conversions may be done.

where : array_like of bool, optional

A boolean array which is broadcasted to match the dimensions of dst, and selects elements to copy from src to dst wherever it contains the value True.

preservena : bool, optional

If set to True, leaves any NA values in dst untouched. This is similar to the “hard mask” feature in numpy.ma.