Gammapy – A prototype for the CTA science tools by Deil, C, Zanin, R, Lefaucheur, J, Boisson, C, Khélifi, B, Terrier, R, Wood, M, Mohrmann, L, Chakraborty, N, Watson, J, López Coto, R, Klepser, S, Cerruti, M, Lenain, J, Acero, F, Djannati-Ataïc, A, Pita, S, Bosnjak, Z, Ruiz, J, Trichard, C, Vuillaume, T, Donath, A, King, J, Jouvin, L, Owen, E, Paz Arribas, M, Sipocz, B, Lennarz, D, Voruganti, A, Spir-Jacob, M