from sklearn.feature_extraction import DictVectorizer staff = [{ 'name': 'Steve Miller', 'age': 33. }, { 'name': 'Lyndon Jones', 'age': 12. }, { 'name': 'Baxter Morth', 'age': 18. }] vec = DictVectorizer() vec.fit_transform(staff).toarray() print(vec.get_feature_age())