counter.py

import concurrent.futures
from time import time


def count_digits(input_str):
    count = {}
    for s in input_str:
        if s.isdigit():
            count[s] = count.get(s, 0) + 1
    return count


def count_digits_process_concurrent(string):
    split_by_len = 20
    len_str = len(string)
    strings = list(
        string[i*split_by_len: min((i+1)*split_by_len, len_str-1)]
        for i in range((len_str // split_by_len) + 1)
    )

    with concurrent.futures.ThreadPoolExecutor() as executor:
        total_counter = {}
        for counter in executor.map(count_digits, strings):
            for key, val in counter.items():
                total_counter[key] = total_counter.get(key, 0) + val
        return total_counter


if __name__ == '__main__':
    start = time()
    res = count_digits('p823j98fh89ahf9sd8h0afsd' * 1000)
    print(f'total: {(time() - start) * 1000} ms')
    print(res)