numpy.memmap.setfield¶

memmap.setfield(val,dtype,offset=0)¶

Put a value into a specified place in a field defined by a data-type.

Placeval intoa’s field defined bydtype and beginningoffsetbytes into the field.

Parameters:	val:object Value to be placed in field. dtype:dtype object Data-type of the field in which to placeval. offset:int, optional The number of bytes into the field at which to placeval.
Returns:	None

See also

getfield

Examples

>>>x=np.eye(3)>>>x.getfield(np.float64)array([[ 1.,  0.,  0.],       [ 0.,  1.,  0.],       [ 0.,  0.,  1.]])>>>x.setfield(3,np.int32)>>>x.getfield(np.int32)array([[3, 3, 3],       [3, 3, 3],       [3, 3, 3]])>>>xarray([[  1.00000000e+000,   1.48219694e-323,   1.48219694e-323],       [  1.48219694e-323,   1.00000000e+000,   1.48219694e-323],       [  1.48219694e-323,   1.48219694e-323,   1.00000000e+000]])>>>x.setfield(np.eye(3),np.int32)>>>xarray([[ 1.,  0.,  0.],       [ 0.,  1.,  0.],       [ 0.,  0.,  1.]])