erdewit/nest_asyncio

Nest asyncio breaks JupyterLab (tornado)

SylvainCorlay opened this issue · 2 comments

SylvainCorlay commented 
[E 09:55:15.053 LabApp] Uncaught exception GET /nbconvert/webpdf/basics.ipynb?download=true (127.0.0.1)
    HTTPServerRequest(protocol='http', host='localhost:8888', method='GET', uri='/nbconvert/webpdf/basics.ipynb?download=true', version='HTTP/1.1', remote_ip='127.0.0.1')
    Traceback (most recent call last):
      File "/home/sylvain/miniconda3/lib/python3.7/site-packages/tornado/web.py", line 1703, in _execute
        result = await result
      File "/home/sylvain/miniconda3/lib/python3.7/site-packages/tornado/gen.py", line 748, in run
        yielded = self.gen.send(value)
      File "/home/sylvain/miniconda3/lib/python3.7/site-packages/notebook/nbconvert/handlers.py", line 152, in get
        self.finish(output)
      File "/home/sylvain/miniconda3/lib/python3.7/site-packages/tornado/web.py", line 1126, in finish
        self.write(chunk)
      File "/home/sylvain/miniconda3/lib/python3.7/site-packages/tornado/web.py", line 834, in write
        raise TypeError(message)
    TypeError: write() only accepts bytes, unicode, and dict objects
erdewit commented

It looks like you're exporting a notebook as PDF. This does work with v1.4.1.

SylvainCorlay commented

It looks like you're exporting a notebook as PDF. This does work with v1.4.1.

Yes, I am exporting a notebook using a new pdf exporter called webpdf (I am a maintainer of nbconvert).

I made a tag of nbconvert where I run the event loop in a thread for that purpose.

Thanks for tagging a release!

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