iwl wrote: > I've tryed to save some data containing empty arrays (array('f')) in a > shelve. > It looks like the shelve has some problems with empty arrays, get > allways: > TypeError: ("'NoneType' object is not iterable", <type 'array.array'>, > ('f', None))- > Messages when dealing with the readed back shelve. > Seems like I have to avoid empty arrays in a shelve.
That seems to be a bug in the underlying pickling mechanism: >>> from array import array >>> from cPickle import loads, dumps >>> loads(dumps(array("f", [1]))) array('f', [1.0]) >>> loads(dumps(array("f"))) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: ("'NoneType' object is not iterable", <type 'array.array'>, ('f', None)) Please submit a bug report. Peter -- http://mail.python.org/mailman/listinfo/python-list