codewars/courses/python_func/higher_func.py

from typing import Callable



def apply(func, objects):
    return [func(x) for x in objects]


def compute(func_list, *args):
    return [func(x) for func in func_list for x in args]


def compute_new(func_list, *args):
    lst = []
    value = 0
    for x in args:
        value = x
        for func in func_list:
            value = func(value)
        lst.append(value)
    
    return lst


# def filter_list(f: Callable, lst: list):
def filter_list(f, lst):
    return [value for value in lst if f(value)]


def filter_collection(f, collection):
    lst = [value for value in collection if f(value)]
    if isinstance(collection, str):
        return ''.join(lst)
    return type(collection)(lst)


def aggregation(func, sequence):
    new_list = []

    foo = func(sequence[0], sequence[1])
    new_list.append(foo)
        
    for x in range(2, len(sequence)):
        foo = func(foo, sequence[x])
        new_list.append(foo)

    return new_list


def aggregation_2(func, sequence):
    new_list = []

    foo = func(sequence[0], sequence[1])
    new_list.append(foo)
        
    for x in range(2, len(sequence)):
        foo = func(foo, sequence[x])
        new_list.append(foo)

    return new_list[-1]


def aggregation_3(func, sequence, initial=None):
    new_list = []

    if initial != None:
        foo = initial
        for x in sequence:
            foo = func(foo, x)
    else:
        foo = func(sequence[0], sequence[1])
        for x in range(2, len(sequence)):
            foo = func(foo, sequence[x])
            
    return foo


"""Для теста"""
def square(num):
    return num ** 2

def inc(num):
    return num + 1

def dec(num):
    return num - 1

def is_even(num):
    return num % 2 == 0

def get_add(x, y):
        return x + y

def get_max(x, y):
    return max(x, y)

def get_product(x, y):
    return x * y




def main():
    # print(compute([inc, dec, square], 10, 20, 30, 40))
    # print(compute_new([inc, square, dec], 10, 20, 30, 40))

    # numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
    # even_numbers = filter_list(is_even, numbers) # берем только четные
    # print(even_numbers)

    # numbers = (1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
    # even_numbers = filter_collection(is_even, numbers)
    # print(even_numbers)

    # print(filter_collection(lambda x: x not in 'aeiou', 'I never heard those lyrics before'))

    # print(aggregation(get_add, [5, 2, 4, 3, 5]))

    # print(aggregation_2(get_max, [1, 4, 5, 7, 6, 5, 8, 10, 5]))
    # print(aggregation_2(get_add, [5, 2, 4, 3, 5]))

    # print(aggregation_3(lambda x, y: x + y, [4, 5, 6], initial=100))
    print(aggregation_3(get_product, [2, 5, 10, 1, 2]))

if __name__ == '__main__':
    main()