James Marshall

Sure @asmeurer : ``` >>> from sympy.parsing.latex import parse_latex >>> parse_latex('x') Traceback (most recent call last): File "", line 1, in File "/anaconda3/envs/mumot-env/lib/python3.7/site-packages/sympy/parsing/latex/__init__.py", line 31, in parse_latex __import__kwargs={'fromlist': ['X']}) File...

Sorry, was rushing this morning and out if the office all day - will look at it properly later

Here you go @asmeurer @oscarbenjamin : ``` >>> from sympy.parsing.latex import parse_latex >>> parse_latex('x') Traceback (most recent call last): File "", line 1, in File "//anaconda3/envs/mumot-env/lib/python3.6/site-packages/sympy/parsing/latex/__init__.py", line 31, in parse_latex...

Thanks @asmeurer - as I said on Gitter I can fix this, but I thought you wanted me to raise an issue so you could diagnose the exception handling error...

I would also suggest that, if this is an environment error, a slightly more intelligible error message could be given. Or preferably update sympy’s dependency on antlr?

@willfurnass would you mind having a crack at this? Seems a good idea - although currently we get a DOI for a specific release via FigShare I believe...

I don't see how that *could* ever be simplified to 0 with the assumptions SymPy has access to, so think it must be a bug... The following (fairly) minimal working...

Hmmm... checking a bit further, it's the simplification of the derivative of `pa` wrt `t` that returns 0 - presumably it treated the derivative as something it knew nothing about...

OK, my thinking is evolving on this - since the simplification is apparently happening inside a call to `solve` we need to figure out what we should actually be doing...

I would say run everything (including in subfolders) in: - [ ] docs - [ ] TestNotebooks - [ ] DemoNotebooks