def student_data():

    students = {}

student_grades = {
    "Ваня": [5, 4, 4, 5],
    "Маша": [3, 4, 5, 5],
    "Афанасий": [5, 5, 5, 5]
}

print(student_grades["Ваня"])  # Вывод: [5, 4, 4, 5]

student_grades["Папич"] = [3, 4, 4]

student_grades["Маша"] = [4, 4, 4]

del student_grades["Афанасий"]

    students = {}  # Второй раз написал, думаю, вы не против)

    while True:

        name = input("Введите имя студента, или 'стоп' для завершения ввода): ")

        if name.lower() == 'стоп':
            break #Если ввели 'стоп', то завершаем цикл

try: # Операция, которая может вызвать исключения, помещается внутрь try
    a = 7 / 0 
    print(a)
except: # Код который должен быть выполнен при возникновении ошибки, находится внутри except
    print('Ошибка! Деление на 0') # Это и будет выводом

try:
    a = 7 / 2
    print(a)
except:
    print('Ошибка! Деление на 0') 

# Вывод: 3.5

        try:
         
            grades = list(map(float, input(f"Введите оценки для {name} через пробел: ").split()))
            students[name] = grades  
        except ValueError:
            print("ERROR")

def student_data():
    students = {}
    while True:
        name = input("Введите имя студента, или 'стоп' для завершения ввода: ")
        if name.lower() == 'стоп':
            break 
        try:
            grades = list(map(float, input(f"Введите оценки для {name} через пробел: ").split()))
            students[name] = grades  
        except ValueError:
            print("ERROR") #Если вы решите ввести буквы в строку для оценок
    return students
        
student_data()

def calculate_average(grades):

return sum(grades) / len(grades) if grades else 0

def calculate_average(grades):
    return sum(grades) / len(grades) if grades else 0
sum_grades = calculate_average([1, 2, 3, 5, 6])
print(sum_grades)

def calculate_average(grades):
    return sum(grades) / len(grades) if grades else 0
sum_grades = calculate_average([])
print(sum_grades)

def calculate_average(grades):
    return sum(grades) / len(grades) if grades else 0

def get_top_students(students, threshold):

return {name: average_rating for name, average_rating in students.items() if average_rating > threshold}

def get_top_students(students, threshold):
    return {name: average_rating for name, average_rating in students.items() if average_rating > threshold} 
    
students = {
    "Brovscki": 4.5,
    "Мaria": 3.8,
    "Antony": 4.9
}

threshold = 4.0  
top_students = get_top_students(students, threshold)
print(top_students) 

return {name: average_rating for name, average_rating in students.items() if average_rating > threshold}

students = { #Из прошлого примера берем
    "Brovscki": 4.5,
    "Мaria": 3.8,
    "Antony": 4.9
}

if average_rating > threshold:

name: average_rating

def get_top_students(students, threshold):
    return {name: average_rating for name, average_rating in students.items() if average_rating > threshold} 
    
students = {
    "Brovscki": 4.5,
    "Мaria": 3.8,
    "Antony": 4.9
}

threshold = 4.3  
top_students = get_top_students(students, threshold)
print(top_students)

def calculate_difference(x, y):
    return x - y if x > y else y - x

result = calculate_difference(10, 4)
print(result)

def sum_range(a, b):
    total = 0
    for i in range(a, b, 2):
        total += i
    return total

result = sum_range(1, 8)
print(result)

def func(n):
    if n == 0:
        return 1
    else:
        return n * func(n - 1)

result = func(5)
result //= 2
print(result)

def main_func(n):
    def not_main_func(x):
        return x * 2
    return not_main_func(n) + not_main_func(n + 1)

result = main_func(3)
print(result)

def mystery_function(a, b):
    return (a ** b) % (a + b)

result = mystery_function(3, 4)
print(result)