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def dict_print(dict_name):
    for i, j in dict_name.items():
        print(f"{i}: ")
        print(f"\tNumber of copies: {j[0]}")
        print(f"\tPrice: {j[1]}")


def dict_add(dict_name):
    new_magazine_name = input("Enter magazine name: ")
    tmp = dict_name.get(new_magazine_name, -1)
    while tmp != -1:
        print("ERROR: this name was used.")
        print("Please, try again")
        new_magazine_name = input("Enter magazine name: ")
        tmp = dict_name.get(new_magazine_name, -1)

    new_number_of_copies = int(input("Enter number of copies magazine: "))
    new_price = int(input("Enter price: "))

    dict_name.update({new_magazine_name: (new_number_of_copies, new_price)})


def dict_del_elem(dict_name):
    del_name = input("Enter enter name you want to delete: ")
    tmp = dict_name.get(del_name, -1)
    while tmp == -1:
        print("ERROR: this name not found.")
        print("Please, try again")
        del_name = input("Enter enter name you want to delete: ")
        tmp = dict_name.get(del_name, -1)

    dict_name.pop(del_name)


def dict_sort(dict_name):
    sorted_tuple = sorted(dict_name.items(), key=lambda x: x[0])
    dict_name = dict(sorted_tuple)
    return dict_name


def dict_calc(dict_name):
    res = 0
    count = 0
    for i, j in dict_name.items():
        if j[0] < 10000:
            count += 1
            res += j[1]
    res /= count
    return res


name_magazine = ("eqwdfszx", "bgfdvscz", "bvvtgf", "sbtygfdfvsd", "asdf")
number_of_copies = [8000, 14000, 20000, 9000, 16000]
price = [1100, 1000, 1200, 500, 1300]

magazine_dict = {k: v for k, v in zip(name_magazine, {k: v for k, v in zip(number_of_copies, price)}.items())}

print("Before sorted: ")
dict_print(magazine_dict)
print("\nAfter sorted: ")
magazine_dict = dict_sort(magazine_dict)
dict_print(magazine_dict)

print("\n\nAdd new element or updates: ")
dict_add(magazine_dict)
magazine_dict = dict_sort(magazine_dict)
dict_print(magazine_dict)

print("\n\nDelete element: ")
dict_del_elem(magazine_dict)
dict_print(magazine_dict)

average_price = dict_calc(magazine_dict)
print(f"\n\nAverage price of magazines with a circulation of less than 10000: {average_price}")