On 11/13/2014 12:37 PM, Antony Lee wrote: > On Python3, __nonzero__ is never defined (always raises an AttributeError), > even after calling __bool__.
The example I posted was Python 3.4.1 with numpy 1.9.0. fwiw, Alan Isaac Python 3.4.1 (v3.4.1:c0e311e010fc, May 18 2014, 10:38:22) [MSC v.1600 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>> import numpy as np >>> np.__version__ '1.9.0' >>> t = np.array(None); t[()] = np.array([None, None]) >>> t.__nonzero__() Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'numpy.ndarray' object has no attribute '__nonzero__' >>> t.__bool__() True >>> t.__nonzero__() ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all() >>> _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
