Vector transforamtion between Oz. You shoult be attentive whith floating poing.

python Oz transformation

#!/usr/bin/python
import numpy
def transformOzVector(alpha, vector):
  m = numpy.matrix([[numpy.math.cos(alpha), -numpy.math.sin(alpha), 0],
                   [numpy.math.sin(alpha), numpy.math.cos(alpha), 0],
                   [0, 0, 1]])
  return m*vector
result = transformOzVector(numpy.math.pi*1, numpy.matrix([1,0,0]).T)
print result