1VALID_SHRUBBERY_PARTS = ('храст', 'shrub', 'bush')
 2MAX_PRICE = 42
 3
 4
 5def function_that_says_ni(*args, **kwargs):
 6    price = 0
 7
 8    price += check_args(args) # there are no keyword args in args so it returns only price
 9
10    res = check_kwargs(kwargs)
11    price += res[0]
12    unique_letters = res[1]
13
14    if int(price) > 0 and price <= MAX_PRICE and len(unique_letters) % int(price) == 0:
15        return f'{price:.2f}лв'
16
17    return 'Ni!'
18
19def check_args(args):
20    """Sums all relevant prices from args"""
21    price = 0
22
23    for arg in args:
24        if type(arg) is dict:
25            if arg.get('name'):
26                if arg['name'].lower() in VALID_SHRUBBERY_PARTS:
27                    price += arg.get('cost', 0)
28
29    return price
30
31def check_kwargs(kwargs):
32    """Sums all relevant prices from kwargs and gets all unique letters from names of named arguments"""
33    price = 0
34    unique_letters = set()
35
36    for arg_name, item in kwargs.items():
37        if type(item) is dict:
38            if item.get('name'):
39                if item['name'].lower() in VALID_SHRUBBERY_PARTS:
40                    price += item.get('cost', 0)
41                    unique_letters.update(arg_name)
42
43    return price, unique_letters