[Numpy-discussion] u in [u+1]

[Neal Becker]

I'm having some trouble here.  I have a list of numpy arrays.  I want to 
know if an array 'u' is in the list.

As an example,
u = np.arange(10)

: u not in [u+1]
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)

/home/nbecker/raysat/test/<ipython console> in <module>()

ValueError: The truth value of an array with more than one element is 
ambiguous. Use a.any() or a.all()

What would be the way to do this?