zdfgdfgsfg.py

def main(file_name, search_list):

    counter = 0

    def handle(state):
        # print(state)
        nonlocal counter
        if state.isdigit():
            integer_state = int(state)
            if integer_state in search_list:
                # print('!!!')
                del search_list[integer_state]
                counter += 1
        # print(search_list)

    with open(file_name) as f:
        i = 0  # file symbol
        state = ''
        while True:
            symbol = f.read(1)

            if symbol in (' ', '\n') or symbol == '' and i != 0:
                handle(state)
                state = ''  # clear current state
            else:
                state = state + symbol

            # The End
            if symbol == '' and i != 0:
                break
            i += 1
        return counter

print(main('test.txt', [0,1,2,3,4]))