I am pymodpde in google corroboratory, with the latest version of sympy (v1.10.1).
In pymodpde.py, the sympy module is importing ok (line 14: from sympy import * ), however line 32 symbol.Symbol is not recognised.
I have found that rolling back to sympy version (v1.5.1), by running:
!pip install --user sympy==1.5.1
allows all references to "symbol.Symbol" in the pymodpde.py script to be recognised.
Looks like the pymodpde.py needs to be updated for the latest sympy version, or hard-code in a !pip install --user sympy==1.5.1 as an interpm fix.
thanks