parts of sagews-jupyter example fail on newly installed cocalc docker instance

[edgimar]

When trying to run this worksheet on a self-hosted cocalc instance (docker container built/pulled on 2021-04-15), various cells fail to run. For example:

# embed external web page
from IPython.core.display import HTML
HTML('<iframe src="https://en.m.wikipedia.org/" width="95%" height=350>')

results in the following:

Error in lines 1-1
Traceback (most recent call last):
  File "/usr/local/sage/local/lib/python3.8/site-packages/smc_sagews/sage_server.py", line 1230, in execute
    exec(
  File "", line 1, in <module>
  File "/usr/local/sage/local/lib/python3.8/site-packages/smc_sagews/sage_server.py", line 1324, in execute_with_code_decorators
    code = code_decorator(code)
  File "/usr/local/sage/local/lib/python3.8/site-packages/smc_sagews/sage_jupyter.py", line 360, in run_code
    display_mime(content['data'])
  File "/usr/local/sage/local/lib/python3.8/site-packages/smc_sagews/sage_jupyter.py", line 292, in display_mime
    show(msg_data['text/latex'])
KeyError: 'text/latex'

Either the example code is no longer valid, or is there a bug in sage/cocalc, it seems.

[haraldschilly]

yes, that's a bug in sage. in particular, it's that jupyter( ... ) mode, which somehow can't deal with a certain message type. I made a ticket.

[edgimar]

With all of the CI tools available now, I wonder if it would be possible to use the worksheets in this repository as tests that run for
new commits to the sage codebase. Is that possible currently?

[haraldschilly]

Well, Sage can't run CoCalc's Sage Worksheets. One would have to write code that ties up the part of CoCalc running the worksheet with sage. However, this is in any way a Sage specific issue, because it happens when you run the jupyter kernel for python.