Source code for kyu_6.numericals_of_string.numericals

#  Created by Egor Kostan.
#  GitHub: https://github.com/ikostan
#  LinkedIn: https://www.linkedin.com/in/egor-kostan/


def numericals(s):
    """
    For each symbol in the string if it's the
    first character occurrence, replace it with
    a '1', else replace it with the amount of
    times you've already seen it.
    :param s:
    :return:
    """

    char_dict = dict()
    result = ''

    for char in s:
        if char in char_dict:
            char_dict[char] += 1
        else:
            char_dict[char] = 1
        result += str(char_dict[char])

    return result