UnboundLocalError: cannot access local variable '_TEMPLATE' where it is not associated with a value

[stepetal]

Command to reproduce the error

Error occured at the moment of execution 'nbdev_new' command (https://nbdev.fast.ai/tutorials/tutorial.html#initialise-your-repo-with-nbdev) inside python venv with installed nbdev library.

Detail description

Full error message looks like Traceback (most recent call last): File "/home/alex/PythonProjects/nbdev_env/bin/nbdev_new", line 8, in <module> sys.exit(nbdev_new()) ^^^^^^^^^^^ File "/home/alex/PythonProjects/nbdev_env/lib/python3.12/site-packages/fastcore/script.py", line 119, in _f return tfunc(**merge(args, args_from_prog(func, xtra))) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/alex/PythonProjects/nbdev_env/lib/python3.12/site-packages/nbdev/cli.py", line 91, in nbdev_new _TEMPLATE = f'{_ORG_OR_USR}/{_TEMPLATE}' ^^^^^^^^^ UnboundLocalError: cannot access local variable '_TEMPLATE' where it is not associated with a value

OS and Python versions

OS: Ubuntu 24.04 LTS Python version: Python 3.12.3 nbdev version: nbdev 2.3.19

nbdev library was installed with help of pip: pip 24.0 from /home/alex/PythonProjects/nbdev_env/lib/python3.12/site-packages/pip (python 3.12)

Possible reason of the error

It is possible that the source of error is the incorrect argument to f - string. https://github.com/fastai/nbdev/blob/master/nbs/api/13_cli.ipynb, function _nbdevnew.

_TEMPLATE = f'{_ORG_OR_USR}/{_TEMPLATE}' In this statement variable _TEMPLATE is used before assignment

Probably this is misprint and '_REPOSITORY' should be used instead of '_TEMPLATE'

How to fix locally

nbdev_new - initial command when creating project with nbdev, so it is not possible to use functionality of the library without it. Steps to fix locally:

1. Create python venv and activate it.
2. Install nbdev and jupyter lab according to the tutorial mentioned above.
3. Get the source https://github.com/fastai/nbdev.git and go to created directory.
4. Replace '_TEMPLATE' with '_REPOSITORY' inside f'{_ORG_OR_USR}/{_TEMPLATE}' in the function _nbdevnew
5. Execute command 'nbdev_export' to update exported py - files
6. Uninstall old nbdev library ( pip uninstall nbdev)
7. Install new nbdev library: pip install .
8. Go to project directory and execute nbdev_new

[deven367]

Hi @stepetal, would you like to create a PR for this?

[stepetal]

Hi! Thanks @deven367. Yes, I would. I will include changes mentioned in the issue