Started learning Django and ran into a problem. What is my mistake?

Question

Django

stack trace

D:\profitart\bboard\models.py changed, reloading.
Watching for file changes with StatReloader
Exception in thread django-main-thread:
Traceback (most recent call last):
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\threading.p
y", line 917, in _bootstrap_inner
    self.run()
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\threading.p
y", line 865, in run
    self._target(*self._args, **self._kwargs)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\utils\autoreload.py", line 54, in wrapper
    fn(*args, **kwargs)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\core\management\commands\runserver.py", line 109, in inner_run
    autoreload.raise_last_exception()
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\utils\autoreload.py", line 77, in raise_last_exception
    raise _exception[0](_exception[1]).with_traceback(_exception[2])
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\utils\autoreload.py", line 54, in wrapper
    fn(*args, **kwargs)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\apps\registry.py", line 114, in populate
    app_config.import_models()
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\apps\config.py", line 211, in import_models
    self.models_module = import_module(models_module_name)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\importlib\_
_init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 724, in exec_module
  File "<frozen importlib._bootstrap_external>", line 860, in get_code
  File "<frozen importlib._bootstrap_external>", line 791, in source_to_code
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "<string>", line None
IndentationError: unindent does not match any outer indentation level (models.py
, line 17)

Traceback (most recent call last):
  File "D:\profitart\manage.py", line 21, in <module>
    main()
  File "D:\profitart\manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\core\management\__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\core\management\__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\core\management\base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\core\management\commands\runserver.py", line 60, in execute
    super().execute(*args, **options)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\core\management\base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\core\management\commands\runserver.py", line 95, in handle
    self.run(**options)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\core\management\commands\runserver.py", line 102, in run
    autoreload.run_with_reloader(self.inner_run, **options)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\utils\autoreload.py", line 577, in run_with_reloader
    start_django(reloader, main_func, *args, **kwargs)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\utils\autoreload.py", line 562, in start_django
    reloader.run(django_main_thread)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\utils\autoreload.py", line 280, in run
    self.run_loop()
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\utils\autoreload.py", line 286, in run_loop
    next(ticker)
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\utils\autoreload.py", line 326, in tick
    for filepath, mtime in self.snapshot_files():
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\utils\autoreload.py", line 342, in snapshot_files
    for file in self.watched_files():
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\utils\autoreload.py", line 241, in watched_files
    yield from iter_all_python_module_files()
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\utils\autoreload.py", line 103, in iter_all_python_module_files
    return iter_modules_and_files(modules, frozenset(_error_files))
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\site-packag
es\django\utils\autoreload.py", line 128, in iter_modules_and_files
    if not path.exists():
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\pathlib.py"
, line 1339, in exists
    self.stat()
  File "C:\Users\Admin\AppData\Local\Programs\Python\Python37-32\lib\pathlib.py"
, line 1161, in stat
    return self._accessor.stat(self)
OSError: [WinError 123] Синтаксическая ошибка в имени файла, имени папки или мет
ке тома: '<frozen importlib._bootstrap>'

gives an error when i add this code

def _str_(self): 
    	return self.name

over here

class Rubric(models.Model):
  name=models.CharField(max_length=20, db_index=True, verbose_name='Название')

Answer 1

IndentationError: unindent does not match any outer indentation level (
models.py ,
line 17)
Replace tabs with 4 spaces
Do not use tabs anywhere

Answer 2

two underscores on each side, well, they already wrote about the indent