I spoke to soon.
I found that I had mistakenly removed an import of transform.
That import was matrices.expressions.matmul.
I didn't expect matmul to provide the definition for the sympy
namespace, that's why I missed my mistake.
--
You received this message because you are subscribed to the Google Groups
"sympy" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sympy.
For more options, visit https://groups.google.com/groups/opt_out.