Fixed Code

# /usr/bin/python3.5
import datetime
import os
import shutil

now = datetime.datetime.now()

script_name = "Something v1.0"
length = 35  # length of "-"

dir_path = os.path.dirname(os.path.realpath(__file__))
new_dir_name = "/data"
new_dir_path = dir_path + new_dir_name

name_file = "/name.txt"
age_file = "/year_born.txt"
about_file = "/about.txt"

var_name = "Name"
var_age = "Age"
var_about = "About"
var_year_born = "Year Born"
header_of_data = "DATA"

help_bar_text = "\n(1)\tShow Data\n(2)\tEdit items in Data" \
                "\n(3)\tEdit About in item\n(4)\tDel all Data\n(end)\texit"

# Windows="cls", osX="clear"
clear_term = ("cls" if os.name == "nt" else "clear")


class Data:
    name_of_person = ""
    age_of_person = 0
    about_person = ""

    def __init__(self, name, year_born, about):
        self.name_of_person = name
        self.about_person = about

        if year_born is None:
            self.age_of_person = ""
        elif year_born < 0:
            self.age_of_person = ""
        elif year_born > now.year:
            self.age_of_person = ""
        else:
            self.age_of_person = now.year - year_born

    def get_name(self):
        return self.name_of_person

    def get_age(self):
        return self.age_of_person

    def get_about(self):
        return self.about_person

    def get_data(self):
        return_str = "\n" + var_name + ":\t {}"
        return_str += "\n" + var_age + ":\t {}"
        return_str += "\n" + var_about + ":\n {}"
        return return_str.format(self.name_of_person,
                                 self.age_of_person,
                                 self.about_person)


# a_j == a-j
def create_txt(a_j, name, year_born):
    _name = open(_dir(a_j) + name_file, "w")
    _name.write(name)
    _name.close()

    _age = open(_dir(a_j) + age_file, "w")
    _age.write(year_born)
    _age.close()


# a_j == a-j
def read_txt(a_j, n_or_y):
    if n_or_y == "n":
        _name = open(_dir(a_j) + name_file, "r")
        output = _name.read()
        _name.close()
        return output
    elif n_or_y == "y":
        _age = open(_dir(a_j) + age_file, "r")
        output = _age.read()
        _age.close()
        if output == "":
            return None
        else:
            return int(output)


# a_j == a-j
def write_story(a_j, story):
    _story = open(_dir(a_j) + about_file, "w")
    _story.write(story)
    _story.close()


# a_j == a-j
def read_story(a_j):
    _story = open(_dir(a_j) + about_file, "r")
    output = _story.read()
    _story.close()
    return output


def del_about(a_j):
    write_story(a_j, "")


def check_if_dir_exist():
    if not os.path.exists(new_dir_path):
        os.makedirs(new_dir_path)
        for directory in lists("dir"):
            os.makedirs(dir(directory))
        return True
    else:
        return True


# a_j == a-j
def _dir(a_j):
    return new_dir_path + "/" + a_j


def read_name(a_j):
    output = []
    for char in a_j:
        number = ord(char) - 97
        output.append(number)
    return lists("name")[output[0]]


# a_j == a-j
def read_data(a_j):
    _data = Data(read_txt(a_j, "n"), read_txt(a_j, "y"), read_story(a_j))
    return _data


# noinspection PyGlobalUndefined
def update_data():
    global a, b, c, d, e, f, g, h, i, j

    a = read_data("a")
    b = read_data("b")
    c = read_data("c")
    d = read_data("d")
    e = read_data("e")
    f = read_data("f")
    g = read_data("g")
    h = read_data("h")
    i = read_data("i")
    j = read_data("j")


def read_all_data():
    check_if_dir_exist()
    update_data()


def database():
    return_str = "-" * length
    return_str += "\n" + header_of_data + ":\n"
    for dir_key in lists("dir"):
        return_str += "\n\t" + dir_key + ":\t{}"
    return_str += "\n\n"
    return_str += "-" * length
    return return_str.format(lists("name")[0], lists("name")[1], lists("name")[2], lists("name")[3], lists("name")[4],
                             lists("name")[5], lists("name")[6], lists("name")[7], lists("name")[8], lists("name")[9])


def lists(list_type):
    update_data()
    name_list = [a.get_name(), b.get_name(), c.get_name(), d.get_name(), e.get_name(),
                 f.get_name(), g.get_name(), h.get_name(), i.get_name(), j.get_name()]

    data_list = [a.get_data(), b.get_data(), c.get_data(), d.get_data(), e.get_data(),
                 f.get_data(), g.get_data(), h.get_data(), i.get_data(), j.get_data()]

    dir_list = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"]

    if list_type == "name":
        return name_list
    elif list_type == "data":
        return data_list
    elif list_type == "dir":
        return dir_list


def main():
    read_all_data()
    script_open = True
    while script_open:

        absolutely_unused_variable = os.system(clear_term)

        print(script_name)
        print("-" * length)
        print(help_bar_text + "\n")
        print("-" * length)

        choice = input("\nChoose: ")

        if choice == "1":
            show_items_open = True
            while show_items_open:
                absolutely_unused_variable = os.system(clear_term)

                print(script_name)
                print(database())
                choice_database = input("Show Item: ")

                try:
                    if read_name(choice_database) == "":
                        show_items_open = True
                    elif choice_database in lists("dir"):
                        absolutely_unused_variable = os.system(clear_term)

                        print("Item=" + choice_database + "\n" + "-" * length)
                        output = []
                        for char in choice_database:
                            number = ord(char) - 97
                            output.append(number)

                        print(lists("name")[output[0]])
                        print("-" * length)
                        input()
                except IndexError:
                    show_items_open = True

                if choice_database == "":
                    show_items_open = False

        if choice == "2":
            edit_items_open = True
            while edit_items_open:
                absolutely_unused_variable = os.system(clear_term)

                print(script_name)
                print(database())
                choice_edit_items = input("Edit Item: ")

                if choice_edit_items in lists("dir"):
                    absolutely_unused_variable = os.system(clear_term)

                    print("Item=" + choice_edit_items + "\n" + "-" * length)
                    name = input("Set " + var_name + ": ")
                    name_read = read_name(choice_edit_items)

                    if name == "":
                        print("Are you sure your want to delete item (" + choice_edit_items + ")?")
                        del_choice = input("y/n")

                        if del_choice == "y":
                            age = ""
                            del_about(choice_edit_items)
                            create_txt(choice_edit_items, name, age)
                            update_data()

                        else:
                            edit_items_open = False

                    elif name != name_read:
                        age = input("Set " + var_year_born + ": ")
                        del_about(choice_edit_items)
                        create_txt(choice_edit_items, name, age)
                        update_data()

                elif choice_edit_items == "":
                    edit_items_open = False

        if choice == "3":
            edit_about_open = True
            while edit_about_open:
                absolutely_unused_variable = os.system(clear_term)
                print(script_name)
                print(database())
                choice_edit_items = input("Edit " + var_about + " in Item: ")

                if choice_edit_items in lists("dir"):
                    absolutely_unused_variable = os.system(clear_term)
                    print("Item=" + choice_edit_items + "\n" + "-" * length)
                    name_read = read_name(choice_edit_items)

                    if name_read == "":
                        edit_about_open = False

                    else:
                        print(var_about + ":\n")
                        main_story = ""
                        while True:
                            story = input()
                            if story == "":
                                break
                            main_story = main_story + "\n" + story
                            write_story(choice_edit_items, main_story)
                            update_data()

                elif choice_edit_items == "":
                    edit_about_open = False

        if choice == "4":
            absolutely_unused_variable = os.system(clear_term)
            print("\nAre you sure you want to delete all data?")
            del_y_or_n = input("y/n: ")

            if del_y_or_n == "y":
                shutil.rmtree(new_dir_path)
                check_if_dir_exist()
                update_data()

        if choice == "end":
            absolutely_unused_variable = os.system(clear_term)
            script_open = False


if __name__ == "__main__":
    main()