Make name for Folder

"""Функция для присвоения названия и нумерации созданных объектов"""

base = ['foo', 'foo(1)', 'foo(3)', 'eggs', 'eggs(1)', 'eggs(2)', 'eggs(13)', 'eggs(100)', 'apple', 'apple(13)', 'apple(14)',
    'bar(1)', 'bar(5)', 'eggser1', 'egger', 'egger(3)', 'eggss3s', 'eggs(104)']


def folder_name(name, base=base):
    if name not in base and len(name) > 0:
        base.append(name)
        return name
    else:
        if ')' in name and '(' in name and name[-2].isdigit():
            name_index_len = len(name.split('(')[-1][:-1])
            name_without_index = name[:-name_index_len - 2]
            indexes_in_db = [x.split('(')[-1][:-1] for x in base if name_without_index == x[:-(len(x.split('(')[-1][:-1])+2)]]
            digit_indexes = [x for x in indexes_in_db if x.isdigit()]
            if len(digit_indexes) == 0:
                result =  name + '(1)'
                base.append(result)
                return result
            digit_indexes = max(map(lambda x: int(x), digit_indexes))
            result = name[:-(name_index_len+1)] + str(digit_indexes +1) + ')'
            base.append(result)
            return(result)

        indexes_in_db = []
        for name_in_db in base:
            if name_in_db.startswith(name) and name_in_db.endswith(')'):
                indexes_in_db.append(name_in_db[len(name):])

    digit_indexes = [x for x in indexes_in_db if x[1:-1].isdigit()]
    digit_indexes = [x.split('(')[1][:-1] for x in digit_indexes]
    if len(digit_indexes) == 0:
        result = name + '(1)'
        base.append(result)
        return result

    result = name + '(' + str(max(map(lambda x: int(x), digit_indexes)) + 1) + ')'
    base.append(result)
    return result


if __name__ == '__main__':

    assert folder_name('foo') == 'foo(4)'
    assert folder_name('hello') == 'hello'
    assert folder_name('apple') == 'apple(15)'
    assert folder_name('bar') == 'bar'
    assert folder_name('bar(1)') == 'bar(6)'
    assert folder_name('foo(100)') == 'foo(100)'
    assert folder_name('foo(3)') == 'foo(101)'
    assert folder_name('') == '(1)'

    print("Tests successfully done.")