weird behavior. bug perhaps?

[rusi]

On Jun 18, 7:23 pm, zoom <z... at yahoo.com> wrote:
> Hi, I have a strange problem here. Perhaps someone would care to help me.
>
> In the file test.py I have the following code:
>
> from scipy import matrix, tile, mean, shape
> import unittest
>
> class TestSequenceFunctions(unittest.TestCase):
>
>      def setUp(self):
>          self.m = [[1,2],[3,4],[3,4],[3,4]]
>
>      def test_simplify(self):
>          m = matrix(self.m)
>          print shape(m)
>          print [shape(m)[1],1]
>          print shape(tile(mean(m,1),[shape(m)[1],1]).T)
>
> if __name__ == '__main__':
>      unittest.main()
>
> (Note that test.py, is just a simplification of my testing file,
> sufficient to reproduce the weird behavior that I'm  about to describe.)
>
> If i run it in terminal via "python test.py" command I get the following
> output:
>
> (4, 2)
> [2, 1]
> (1, 8)
> .
> ----------------------------------------------------------------------
> Ran 1 test in 0.000s
>
> OK
>
> Now comes the funny part.
> Let's try to run the following code in python interpreter:
>
>  >>> m = [[1,2],[3,4],[3,4],[3,4]]
>  >>>
>  >>> from scipy import matrix, tile, mean, shape
>  >>> print shape(m)
> (4, 2)
>  >>> print [shape(m)[1],1]
> [2, 1]
>  >>> print shape(tile(mean(m,1),[shape(m)[1],1]).T)
> (4, 2)
>
> Note the difference between outputs of:
> print shape(tile(mean(m,1),[shape(m)[1],1]).T)
>
> I mean, WTF?
> This is definitely not the expected behavior.
> Anybody knows what just happened here?

[Never used scipy so pls excuse if I am off...]

Given list m, in the class you are doing m -> matrix(m)
which you dont seem to be doing in the interpreter.