HW18_decorators.py

#Task 1
# import time
# def timer(func):
#     def wrapper(*args, **kwargs):
#         st = time.time()
#         result = func(*args, **kwargs)
#         fn = time.time()
#         print(f"{func.__name__} поработала {fn-st} секунд")
#         return result
#     return wrapper

# @timer
# def slow_calculation(n):
#     result = 0
#     for i in range(n):
#         result += i ** 2
#     return result

# slow_calculation(1_000_000)  


#Task 2

# def cache(func):
#     d = dict()

#     def inside_func(x):
#         if x not in d:
#             d[x] = func(x)
#         return d[x]
#     return inside_func
    
# @cache
# def f(x):
#     if x <= 1: return x
#     return f(x-1) + f(x-2)

# for i in range(100):
#     print(i, f(i))


#Task 3
import time
def logging(func):
    def wrapper(*args, **kwargs):
        with open("log.txt", 'a', encoding='utf-16') as file:
            file.write(f"{func.__name__} started with args: {args}\n")
            result = func(*args, **kwargs)
            file.write(f"{func.__name__} finished\n")
            return result
    return wrapper

@logging
def work(*args):
    for x in args:
        time.sleep(1)
        if x%2 != 0:
            x+= 1
    print("work is done")

work(1, 4, 6, 7, 9, 0)
    


#Task 4
# import time
# import random
# def retry(func):
#     def wrapper(*args, **kwargs):
#         check = func()
#         if check == None:
#             for x in range(5):
#                 print(f"Вызываю функцию {func.__name__}")
#                 time.sleep(1)
                
#                 check = func()
#                 if check != None:
#                     return check
#         else: return check

#     return wrapper

# @retry
# def f():
#     x = random.randint(1, 5)
#     if x <= 3:
#         return None
#     else: return x


# print(f())