ImportError: cannot import name polytools
I'm using SageMath 8.2 Notebook to solve a symbolic equation.
But I'm getting "ImportError: cannot import name polytools".
Thank you.
EDIT: Shutting down the notebook and re-opening fixed it.
How could we guess the problem ? Could you please provide all the code that lead to the error ?
polytools.py
is a file in the SymPy package, for what that's worth, and the only import statement I can find is inlocal/lib/python2.7/site-packages/sympy/polys/__init__.py
:from . import polytools
.Please provide code that results in this error.