mrecords.py 文件源码

def __array_finalize__(self, obj):
        # Make sure we have a _fieldmask by default
        _mask = getattr(obj, '_mask', None)
        if _mask is None:
            objmask = getattr(obj, '_mask', nomask)
            _dtype = ndarray.__getattribute__(self, 'dtype')
            if objmask is nomask:
                _mask = ma.make_mask_none(self.shape, dtype=_dtype)
            else:
                mdescr = ma.make_mask_descr(_dtype)
                _mask = narray([tuple([m] * len(mdescr)) for m in objmask],
                               dtype=mdescr).view(recarray)
        # Update some of the attributes
        _dict = self.__dict__
        _dict.update(_mask=_mask)
        self._update_from(obj)
        if _dict['_baseclass'] == ndarray:
            _dict['_baseclass'] = recarray
        return