Re-enabling SCIP inside Jupyter Notebooks (regression)

[mdealencar]

Commit https://github.com/coin-or/pulp/commit/0c2b9418136406c7c54054f4ccbf0ec90b9787c4 removed the changes made by commit https://github.com/coin-or/pulp/commit/a587e8e69d6629b3a55b2559a08179f019085253 that addressed the issues (now closed) #427 and #428. The result is that the current master branch is producing the same error as described in that issue:

File ~\programs\miniconda\envs\work\lib\site-packages\ipykernel\iostream.py:356, in OutStream.fileno(self)
    354 else:
    355     msg = "fileno"
--> 356     raise io.UnsupportedOperation(msg)

UnsupportedOperation: fileno

What operating system are you using?

• [x] Windows: ( version: ___ )
• [ ] Linux: ( distro: ___ )
• [ ] Mac OS: ( version: ___ )
• [ ] Other: ___

I'm using python version:

• [ ] 2.7
• [ ] 3.4
• [ ] 3.5
• [ ] 3.6
• [x] Other: 3.10

I installed PuLP via:

• [ ] pypi (python -m pip install pulp)
• [x] github (python -m pip install -U git+https://github.com/coin-or/pulp)
• [ ] Other: ___ (conda?)

Did you also

• [x] Tried out the latest github version: https://github.com/coin-or/pulp
• [x] Searched for an existing similar issue: https://github.com/coin-or/pulp/issues?utf8=%E2%9C%93&q=is%3Aissue%20

[pchtsp]

Thanks. And sorry to hear about the regression: it's hard to test for jupyter notebooks since we do not have unit tests for that.

1. Do you know if there's a way to add a test to be sure that a regression doesn't happen again?/ more broadly add a jupyter notebook test?
2. Would you be able to add a new PR that adds back the changes?