python 3.3 I have a bug because we have a check for a .data attribute, that is not supposed to be available for a string. (Pdb) dir(data) ['T', '__abs__', '__add__', '__and__', '__array__', '__array_interface__', '__array_priority__', '__array_struct__', '__array_wrap__', '__bool__', '__class__', '__contains__', '__copy__', '__deepcopy__', '__delattr__', '__dir__', '__divmod__', '__doc__', '__eq__', '__float__', '__floordiv__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getnewargs__', '__gt__', '__hash__', '__init__', '__int__', '__invert__', '__iter__', '__le__', '__len__', '__lshift__', '__lt__', '__mod__', '__mul__', '__ne__', '__neg__', '__new__', '__or__', '__pos__', '__pow__', '__radd__', '__rand__', '__rdivmod__', '__reduce__', '__reduce_ex__', '__repr__', '__rfloordiv__', '__rlshift__', '__rmod__', '__rmul__', '__ror__', '__round__', '__rpow__', '__rrshift__', '__rshift__', '__rsub__', '__rtruediv__', '__rxor__', '__setattr__', '__setstate__', '__sizeof__', '__str__', '__sub__', '__subclasshook__', '__truediv__', '__xor__', 'all', 'any', 'argmax', 'argmin', 'argsort', 'astype', 'base', 'byteswap', 'capitalize', 'casefold', 'center', 'choose', 'clip', 'compress', 'conj', 'conjugate', 'copy', 'count', 'cumprod', 'cumsum', 'data', 'diagonal', 'dtype', 'dump', 'dumps', 'encode', 'endswith', 'expandtabs', 'fill', 'find', 'flags', 'flat', 'flatten', 'format', 'format_map', 'getfield', 'imag', 'index', 'isalnum', 'isalpha', 'isdecimal', 'isdigit', 'isidentifier', 'islower', 'isnumeric', 'isprintable', 'isspace', 'istitle', 'isupper', 'item', 'itemset', 'itemsize', 'join', 'ljust', 'lower', 'lstrip', 'maketrans', 'max', 'mean', 'min', 'nbytes', 'ndim', 'newbyteorder', 'nonzero', 'partition', 'prod', 'ptp', 'put', 'ravel', 'real', 'repeat', 'replace', 'reshape', 'resize', 'rfind', 'rindex', 'rjust', 'round', 'rpartition', 'rsplit', 'rstrip', 'searchsorted', 'setfield', 'setflags', 'shape', 'size', 'sort', 'split', 'splitlines', 'squeeze', 'startswith', 'std', 'strides', 'strip', 'sum', 'swapaxes', 'swapcase', 'take', 'title', 'tofile', 'tolist', 'tostring', 'trace', 'translate', 'transpose', 'upper', 'var', 'view', 'zfill'] (Pdb) data '0' (Pdb) type(data) <class 'numpy.str_'> (Pdb) data.data *** TypeError: memoryview: numpy.str_ object does not have the buffer interface (Pdb) Josef