solution.py

# We need a method in the List Class that may count specific digits from a given list of integers.
# This marked digits will be given in a second list.
# The method .count_spec_digits()/.countSpecDigits() will accept two arguments,
# a list of an uncertain amount of integers integers_lists/integersLists (and of an uncertain amount of digits, too)
# and a second list, digits_list/digitsList that has the specific digits to count which length cannot be longer than 10
# (It's obvious, we've got ten digits).
# The method will output a list of tuples, each tuple having two elements, the first one will be a digit to count,
# and second one, its corresponding total frequency in all the integers of the first list.
# This list of tuples should be ordered with the same order that the digits have in digitsList


class List:
    def count_spec_digits(self, integers_list, digits_list):
        integers_list = ''.join(str(i) for i in integers_list)
        return [(i, integers_list.count(str(i))) for i in digits_list]