numpy.ma.MaskedArray.tobytes

method

MaskedArray.tobytes(self, fill_value=None, order='C') [source]

Return the array data as a string containing the raw bytes in the array.

The array is filled with a fill value before the string conversion.

New in version 1.9.0.

Parameters

fill_valuescalar, optional

Value used to fill in the masked values. Default is None, in which case MaskedArray.fill_value is used.

order{‘C’,’F’,’A’}, optional

Order of the data item in the copy. Default is ‘C’.

• ‘C’ – C order (row major).
• ‘F’ – Fortran order (column major).
• ‘A’ – Any, current order of array.
• None – Same as ‘A’.

See also

numpy.ndarray.tobytes, tolist, tofile

Notes

As for ndarray.tobytes, information about the shape, dtype, etc., but also about fill_value, will be lost.

Examples

>>> x = np.ma.array(np.array([[1, 2], [3, 4]]), mask=[[0, 1], [1, 0]])
>>> x.tobytes()
b'\x01\x00\x00\x00\x00\x00\x00\x00?B\x0f\x00\x00\x00\x00\x00?B\x0f\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00'