Uncaught exception due to missing file

[reservoirinvest]

Uncaught exception GET /jupyterlab_code_formatter

  File "~\python\nse\.venv\Lib\site-packages\tornado\web.py", line 1788, in _execute
    result = method(*self.path_args, **self.path_kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "~\python\nse\.venv\Lib\site-packages\tornado\web.py", line 3301, in wrapper
    return method(self, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "~\python\nse\.venv\Lib\site-packages\jupyterlab_code_formatter\handlers.py", line 18, in get
    "formatters": {
                  ^
  File "~\python\nse\.venv\Lib\site-packages\jupyterlab_code_formatter\handlers.py", line 20, in <dictcomp>
    "enabled": formatter.cached_importable if use_cache else formatter.importable,
                                                             ^^^^^^^^^^^^^^^^^^^^
  File "~\python\nse\.venv\Lib\site-packages\jupyterlab_code_formatter\formatters.py", line 364, in importable
    package_location = subprocess.run(
                       ^^^^^^^^^^^^^^^
  File "~\AppData\Local\Programs\Python\Python311\Lib\subprocess.py", line 548, in run
    with Popen(*popenargs, **kwargs) as process:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "~\AppData\Local\Programs\Python\Python311\Lib\subprocess.py", line 1026, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "~\AppData\Local\Programs\Python\Python311\Lib\subprocess.py", line 1538, in _execute_child
    hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [WinError 2] The system cannot find the file specified

[W 2024-07-30 01:55:58.738 ServerApp] wrote error: 'Unhandled error'
Traceback (most recent call last):
File "\python\nse.venv\Lib\site-packages\tornado\web.py", line 1788, in _execute
result = method(*self.path_args, **self.path_kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "\python\nse.venv\Lib\site-packages\tornado\web.py", line 3301, in wrapper
return method(self, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "\python\nse.venv\Lib\site-packages\jupyterlab_code_formatter\handlers.py", line 18, in get
"formatters": {
^
File "\python\nse.venv\Lib\site-packages\jupyterlab_code_formatter\handlers.py", line 20, in
"enabled": formatter.cached_importable if use_cache else formatter.importable,
^^^^^^^^^^^^^^^^^^^^
File "\python\nse.venv\Lib\site-packages\jupyterlab_code_formatter\formatters.py", line 364, in importable
package_location = subprocess.run(
^^^^^^^^^^^^^^^
File "\AppData\Local\Programs\Python\Python311\Lib\subprocess.py", line 548, in run
with Popen(*popenargs, **kwargs) as process:
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "\AppData\Local\Programs\Python\Python311\Lib\subprocess.py", line 1026, in init
self._execute_child(args, executable, preexec_fn, close_fds,
File "\AppData\Local\Programs\Python\Python311\Lib\subprocess.py", line 1538, in _execute_child
hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [WinError 2] The system cannot find the file specified

[st-bender]

Hi there,
The same problem on Linux.
But the message is a bit more specific:

FileNotFoundError: [Errno 2] No such file or directory: 'Rscript'

HTH.

[ctcjab]

I am also seeing this: After customizing the jupyter-minimal-notebook base image to include this extension out-of-the-box, along with black, isort, and ruff, now the following gets logged by this extension every time the JupyterLab UI is loaded:

2024-08-07 13:43:42,934 - ServerApp - ERROR - Uncaught exception GET /jupyterlab_code_formatter/formatters?1723038222929 (192.168.65.1)
HTTPServerRequest(protocol='http', host='127.0.0.1:8888', method='GET', uri='/jupyterlab_code_formatter/formatters?1723038222929', version='HTTP/1.1', remote_ip='192.168.65.1')
Traceback (most recent call last):
  File "/opt/conda/lib/python3.11/site-packages/tornado/web.py", line 1788, in _execute
    result = method(*self.path_args, **self.path_kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/conda/lib/python3.11/site-packages/tornado/web.py", line 3301, in wrapper
    return method(self, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/conda/lib/python3.11/site-packages/jupyterlab_code_formatter/handlers.py", line 18, in get
    "formatters": {
                  ^
  File "/opt/conda/lib/python3.11/site-packages/jupyterlab_code_formatter/handlers.py", line 20, in <dictcomp>
    "enabled": formatter.cached_importable if use_cache else formatter.importable,
                                                             ^^^^^^^^^^^^^^^^^^^^
  File "/opt/conda/lib/python3.11/site-packages/jupyterlab_code_formatter/formatters.py", line 364, in importable
    package_location = subprocess.run(
                       ^^^^^^^^^^^^^^^
  File "/opt/conda/lib/python3.11/subprocess.py", line 548, in run
    with Popen(*popenargs, **kwargs) as process:
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/conda/lib/python3.11/subprocess.py", line 1026, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "/opt/conda/lib/python3.11/subprocess.py", line 1955, in _execute_child
    raise child_exception_type(errno_num, err_msg, err_filename)
FileNotFoundError: [Errno 2] No such file or directory: 'Rscript'
[W 2024-08-07 13:43:42.937 ServerApp] wrote error: 'Unhandled error'

I have no need for R so I don't want to install Rscript just to avoid this log spam. Hopefully it's easy enough to change this code to catch and handle this exception gracefully.

[ctcjab]

Thanks for the quick fix! And thanks for maintaining this extension. ❤️

[ctcjab]

I'll look out for the next release so I can test it when it's out, and post back here if I see anything unexpected.

[krassowski]

@ctcjab and others, can you confirm that this is fixed after installing the latest release v3.0.1? It is already on PyPI, will be on conda-forge soon.

[ctcjab]

Confirmed, thanks!