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FS#62808 - [python-tornado] 6.0.2-1 breaks jupyter-nbconvert

Attached to Project: Community Packages
Opened by hexchain (hexchain) - Tuesday, 04 June 2019, 08:59 GMT
Last edited by Antonio Rojas (arojas) - Wednesday, 13 November 2019, 13:37 GMT
Task Type Bug Report
Category Packages
Status Closed
Assigned To Kyle Keen (keenerd)
Architecture All
Severity Medium
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 0
Private No



community/jupyter-nbconvert 5.4-1 does not work with community-testing/python-tornado 6.0.2-1:

[E 10:54:00.017 NotebookApp] Uncaught exception GET /notebooks/Projects/LDP/LDP-Copy1.ipynb (::1)
HTTPServerRequest(protocol='http', host='localhost:8889', method='GET', uri='/notebooks/Projects/LDP/LDP-Copy1.ipynb', version='HTTP/1.1', remote_ip='::1')
Traceback (most recent call last):
File "/usr/lib/python3.7/site-packages/tornado/", line 1697, in _execute
result = method(*self.path_args, **self.path_kwargs)
File "/usr/lib/python3.7/site-packages/tornado/", line 3174, in wrapper
return method(self, *args, **kwargs)
File "/usr/lib/python3.7/site-packages/notebook/notebook/", line 59, in get
File "/usr/lib/python3.7/site-packages/notebook/base/", line 519, in render_template
return template.render(**ns)
File "/usr/lib/python3.7/site-packages/jinja2/", line 76, in render
return original_render(self, *args, **kwargs)
File "/usr/lib/python3.7/site-packages/jinja2/", line 1008, in render
return self.environment.handle_exception(exc_info, True)
File "/usr/lib/python3.7/site-packages/jinja2/", line 780, in handle_exception
reraise(exc_type, exc_value, tb)
File "/usr/lib/python3.7/site-packages/jinja2/", line 37, in reraise
raise value.with_traceback(tb)
File "/usr/lib/python3.7/site-packages/notebook/templates/notebook.html", line 1, in top-level template code
{% extends "page.html" %}
File "/usr/lib/python3.7/site-packages/notebook/templates/page.html", line 154, in top-level template code
{% block header %}
File "/usr/lib/python3.7/site-packages/notebook/templates/notebook.html", line 120, in block "header"
{% for exporter in get_custom_frontend_exporters() %}
File "/usr/lib/python3.7/site-packages/notebook/notebook/", line 19, in get_custom_frontend_exporters
from nbconvert.exporters.base import get_export_names, get_exporter
File "/usr/lib/python3.7/site-packages/nbconvert/", line 7, in <module>
from . import postprocessors
File "/usr/lib/python3.7/site-packages/nbconvert/postprocessors/", line 5, in <module>
from .serve import ServePostProcessor
File "/usr/lib/python3.7/site-packages/nbconvert/postprocessors/", line 19, in <module>
class ProxyHandler(web.RequestHandler):
File "/usr/lib/python3.7/site-packages/nbconvert/postprocessors/", line 21, in ProxyHandler
AttributeError: module 'tornado.web' has no attribute 'asynchronous'

Steps to reproduce:

1. Open any .ipynb in Jupyter notebook.
This task depends upon

Closed by  Antonio Rojas (arojas)
Wednesday, 13 November 2019, 13:37 GMT
Reason for closing:  Fixed
Comment by Chih-Hsuan Yen (yan12125) - Tuesday, 04 June 2019, 09:19 GMT
As a record, upstream dev said that the issue is fixed in nbconvert 5.4.1:
Comment by Kyle Keen (keenerd) - Wednesday, 05 June 2019, 01:46 GMT
Updated nbconvert to 5.5.0. It works for me now. You?
Comment by hexchain (hexchain) - Monday, 11 November 2019, 20:42 GMT
Guess this can be closed, as jupyter-nbconvert is already 5.6.0 now.