The line reg.predict(1740) does not work anymore. The new versions of sklearn requiere a matrix as input. thus, it can be solved by using this code: obs = 1740 obs_as_matrix = np.reshape(obs, (1,1)) reg.predict(obs_as_matrix) Alternatively: obs = 1740 obs_as_matrix = np.array([obs]).reshape(1, 1) reg.predict(obs_as_matrix) Or as a data frame: obs = 1740 obs_as_matrix = pd.DataFrame({'SAT':[1740]}) reg.predict(obs_as_matrix)

Thank you for the clarification

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