wrappers

# task 1
import time

def timer(func):
    def inside_func(*args,**kwargs):
        start = time.time()
        func(*args, **kwargs)
        end = time.time()
        return end - start
    return inside_func

# task 2

def cacher(func):
    D = dict()
    def wrapper(*args):
        if args in D:
            return D[args]
        D[args] = func(*args)
        return D[args]
    return wrapper

# task 3

def loggining(func, name_file):
    def wrapper(*args, **kwargs):
        with open(name_file, "w", encoding='utf-8') as f:
            f.write(f'Функция {func.__name__} была вызвана с аргументами {args} {kwargs}. Ее результат: {func(*args, **kwargs)}')
    return wrapper

# task 4

def retry(max_at, delay = 0):
    def wrapper(func):
        def inside_func(*args,**kwargs):
            res = func(*args,**kwargs)
            at = 0
            while max_at <= at:
                if res is not None:
                    return res
                at += 1
                time.sleep(delay)
            return None
        return inside_func
    return wrapper