Dear Stéphane,

> On Oct 16, 2019, at 19:39, Téletchéa Stéphane 
> <stephane.teletc...@univ-nantes.fr> wrote:
> Did you 'by chance' transmit your presentation in PDF?

Yes, I exported my Keynote.app presentation to PDF.

However, I also sent the specific commands in email as plain text, as part of 
the process of trying to diagnose the problem.

> This may come from a weird bug in quote management from a PDF file when you 
> copy/paste double quotes,

The student sent me screen grabs. I can see that quotes are not the issue.

If they were, I would expect to see a "SyntaxError: invalid character in 
identifier" as Python doesn't recognize left-handed or right-handed double 
quotes in a way that doesn't cause an error. Instead, the MolFromSmiles() 
appears to be evaluated.

For what it's worth, I've long since disabled smart quotes in Keynote.app, and 
haven't had this problem with other students, which includes students working 
on Windows.

The only thing I can see that's different is that my previous students used a 
2018 release of RDKit, not 2019. And of course an older version of Jupyter.


                                Andrew
                                da...@dalkescientific.com




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