On Fri, Jun 5, 2015 at 8:46 AM, Paul Appleby <pap@nowhere.invalid> wrote: > I saw somewhere on the net that you can copy a list with slicing. So > what's happening when I try it with a numpy array? > >>>> a = numpy.array([1,2,3]) >>>> b = a[:] >>>> a is b > False >>>> b[1] = 9 >>>> a > array([1, 9, 3])
is is identity testing, == is equality testing >>> a = numpy.array([1,2,3]) >>> b = a[:] >>> a == b array([ True, True, True], dtype=bool) >>> id(a) 4510409872 >>> id(b) 4510410192 -- https://mail.python.org/mailman/listinfo/python-list
