1def function_that_says_ni(*args, **kwargs):
 2    total_cost = 0
 3    accepted_bushes_count = 0
 4
 5    for argument in args:
 6        if type(argument) is dict and is_bush_valid(argument):
 7            total_cost += argument.get("cost", 0)
 8            accepted_bushes_count += 1
 9
10    accepted_bushes_keys = []
11
12    for key, value in kwargs.items():
13        if type(value) is dict and is_bush_valid(value):
14            total_cost += value.get("cost", 0)
15            accepted_bushes_count += 1
16            accepted_bushes_keys.append(key)
17
18    if (accepted_bushes_count != 0 and
19        is_shrubbery_nice(total_cost, accepted_bushes_keys) and not
20        total_cost > 42
21    ):
22        return f"{total_cost:.2f}лв"
23    else:
24        return "Ni!"
25
26
27def get_unique_symbols_count(keys):
28    return len(set(''.join(keys)))
29
30
31def is_bush_valid(bush):
32    return ("name" in bush and
33            type(bush["name"]) is str and
34            bush["name"].lower() in {"храст", "shrub", "bush"})
35
36
37def is_shrubbery_nice(total, accepted_keys):
38    whole_part = int(total)
39    return (whole_part != 0 and
40            get_unique_symbols_count(accepted_keys) % whole_part == 0)