I think it's unfortunate that functions like logical_or are limited to binary.
As a workaround, I've been using this:
def apply_binary (func, *args):
if len (args) == 1:
return args[0]
elif len (args) == 2:
return func (*args)
else:
return func (
apply_binary (func, *args[:len(args)/2]),
apply_binary (func, *args[(len(args))/2:]))
Then for example:
punc2 = np.logical_and (u % 5 == 4,
apply_binary (np.logical_or, u/5 == 3, u/5 == 8, u/5 ==
13))
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