Hello,

I am just learning how to use oTree, and I have an issue when trying to use the startapp command. Here is the command line output:

otree startapp multiply
Traceback (most recent call last):
  File "otree/tutorial/otree_venv/lib/python3.12/site-packages/otree/database.py", line 275, in init_orm
    models = get_models_module(app)
             ^^^^^^^^^^^^^^^^^^^^^^
  File "otree/tutorial/otree_venv/lib/python3.12/site-packages/otree/common.py", line 75, in get_models_module
    return import_module(module_name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.12/lib/python3.12/importlib/__init__.py", line 90, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1310, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1324, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'multiply'

I've already changed the SESSION_CONFIGS in the settings.py file as such:
SESSION_CONFIGS = [
    dict(
        name='multiply',
        num_demo_participants=10,
        app_sequence=['multiply'],
    ),
]

I am using a venv.

Thanks in advance for your help,
Jessica

I think it will work if you remove the entry that you added from the settings.py.

Try editing the settings.py file only after you have run “otree startapp multiply”.

Hello,

Thank you so much for the speedy reply!! I only modified this because I initially got this error: 

Traceback (most recent call last):
  File "otree/tutorial/otree_venv/bin/otree", line 8, in <module>
    sys.exit(execute_from_command_line())
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "otree/tutorial/otree_venv/lib/python3.12/site-packages/otree/main.py", line 108, in execute_from_command_line
    setup()
  File "otree/tutorial/otree_venv/lib/python3.12/site-packages/otree/main.py", line 132, in setup
    from otree import settings
  File "otree/tutorial/otree_venv/lib/python3.12/site-packages/otree/settings.py", line 50, in <module>
    OTREE_APPS = get_OTREE_APPS(settings.SESSION_CONFIGS)
                                ^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'settings' has no attribute 'SESSION_CONFIGS'

Well, there has to be *some* SESSIONS_CONFIGS entry in the settings.py.

If I execute

otree startproject example_games

(in some suitable parent folder) and answer the question,

“Include sample games? (y or n): y”

with “y[es],” oTree generates a folder “example_games” with a settings.py file in it.

If I then execute

cd example_games

and then

otree startapp multiply

(in the “example_games” folder), everything works. After that, you can edit the settings.py and add

    dict(
        name='multiply',
        num_demo_participants=10,
        app_sequence=['multiply'],
    ),

to SESSION_CONFIGS.