can not debugging in django

I tried to use IPDB in a Django project, but found that it would cause the program to stop.

from django.http import HttpResponse

# Create your views here.


def home(request):
    import ipdb
    ipdb.set_trace()
    return HttpResponse("ok")

When the program reaches the breakpoint, it pauses for a moment and then crash.

(python3.7) ➜  blog python manage.py runserver
Watching for file changes with StatReloader
Performing system checks...

System check identified no issues (0 silenced).

You have 3 unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): contenttypes, sessions.
Run 'python manage.py migrate' to apply them.

June 17, 2019 - 16:14:42
Django version 2.2.2, using settings 'blog.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
> /home/user/project/django_example/blog/user/views.py(9)home()
      7     import ipdb
      8     ipdb.set_trace()
----> 9     return HttpResponse("ok")

ipdb> Traceback (most recent call last):                                                                                                                                                                                                                                 
  File "manage.py", line 21, in <module>
    main()
  File "manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line
    utility.execute()
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/core/management/__init__.py", line 375, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/core/management/base.py", line 323, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 60, in execute
    super().execute(*args, **options)
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/core/management/base.py", line 364, in execute
    output = self.handle(*args, **options)
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 95, in handle
    self.run(**options)
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/core/management/commands/runserver.py", line 102, in run
    autoreload.run_with_reloader(self.inner_run, **options)
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/utils/autoreload.py", line 585, in run_with_reloader
    start_django(reloader, main_func, *args, **kwargs)
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/utils/autoreload.py", line 570, in start_django
    reloader.run(django_main_thread)
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/utils/autoreload.py", line 288, in run
    self.run_loop()
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/utils/autoreload.py", line 294, in run_loop
    next(ticker)
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/utils/autoreload.py", line 334, in tick
    for filepath, mtime in self.snapshot_files():
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/utils/autoreload.py", line 350, in snapshot_files
    for file in self.watched_files():
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/utils/autoreload.py", line 249, in watched_files
    yield from iter_all_python_module_files()
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/utils/autoreload.py", line 103, in iter_all_python_module_files
    return iter_modules_and_files(modules, frozenset(_error_files))
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/django/utils/autoreload.py", line 120, in iter_modules_and_files
    sys_file_paths.append(module.__file__)
AttributeError: module '__main__' has no attribute '__file__'

If you suspect this is an IPython bug, please report it at:
    https://github.com/ipython/ipython/issues
or send an email to the mailing list at [e-mail]

You can print a more detailed traceback right now with "%tb", or use "%debug"
to interactively debug it.

Extra-detailed tracebacks for bug-reporting purposes can be enabled via:
    %config Application.verbose_crash=True

Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/IPython/core/history.py", line 780, in writeout_cache
    self._writeout_input_cache(conn)
  File "/home/user/.virtualenvs/python3.7/lib/python3.7/site-packages/IPython/core/history.py", line 764, in _writeout_input_cache
    (self.session_number,)+line)
sqlite3.ProgrammingError: SQLite objects created in a thread can only be used in that same thread. The object was created in thread id 140378414733056 and this is thread id 140378526684928.
(python3.7) ➜  blog 

my pc system is ubuntu 16.04 and

Django==2.2.2
ipdb==0.12
ipython==7.5.0

[sazima]

def home(request):
    import pdb
    pdb.set_trace()
    return HttpResponse("ok")

pdb works for me

[gotcha]

@hvdklauw Thanks for follow up