Method __new__

numpy/core/defchararray.py:2063–2096

(subtype, shape, itemsize=1, unicode=False, buffer=None,
                offset=0, strides=None, order='C')

    """
    def __new__(subtype, shape, itemsize=1, unicode=False, buffer=None,
                offset=0, strides=None, order='C'):
        global _globalvar

        if unicode:
            dtype = str_
        else:
            dtype = bytes_

        # force itemsize to be a Python int, since using NumPy integer
        # types results in itemsize.itemsize being used as the size of
        # strings in the new array.
        itemsize = int(itemsize)

        if isinstance(buffer, str):
            # unicode objects do not have the buffer interface
            filler = buffer
            buffer = None
        else:
            filler = None

        _globalvar = 1
        if buffer is None:
            self = ndarray.__new__(subtype, shape, (dtype, itemsize),
                                   order=order)
        else:
            self = ndarray.__new__(subtype, shape, (dtype, itemsize),
                                   buffer=buffer,
                                   offset=offset, strides=strides,
                                   order=order)
        if filler is not None:
            self[...] = filler
        _globalvar = 0
        return self

    def __array_finalize__(self, obj):
        # The b is a special case because it is used for reconstructing.