"""

Домашнее задание №1

Цикл for: Оценки

* Создать список из словарей с оценками учеников разных классов
  школы вида [{'school_class': '4a', 'scores': [3,4,4,5,2]}, ...]
* Посчитать и вывести средний балл по всей школе.
* Посчитать и вывести средний балл по каждому классу.
"""
school_classes = [
    {'school_class': '1a','scores':[4,5,3,5,3]},
    {'school_class': '2b','scores':[4,3,3,4,4]},
    {'school_class': '3a','scores':[5,5,5,3,5]},
    {'school_class': '5a','scores':[4,5,3,5,3,2,5,4,2]},
    {'school_class': '6b','scores':[2,4,5,3,5,4,5,3,5,3]},
    {'school_class': '7b','scores':[4,5,3,5,3,2,2,4]}
    ]

def main(school_classes):
    classes_middle_scores=[]
    scores = 0
    for i in range(len(school_classes)):
        elem=school_classes[i]
        middle_score=(elem['school_class'],float(sum(elem['scores'])/len(elem['scores'])))
        classes_middle_scores.append(middle_score)
        i+=1
    for i in range(len(classes_middle_scores)):
        elem=classes_middle_scores[i][1]
        scores+=elem
        i+=1
    school_middle_score=scores/len(classes_middle_scores)
    return classes_middle_scores, f'school middle scores={school_middle_score}'



if __name__ == "__main__":
    print(main(school_classes))